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TUSB8041
SLLSEE4E – JUNE 2014 – REVISED JUNE 2016
TUSB8041 Four-Port USB 3.0 Hub
1 Features
•
•
1
•
•
•
•
•
•
•
Four Port USB 3.0 Hub
USB 2.0 Hub Features
– Multi Transaction Translator (MTT) Hub: Four
Transaction Translators
– Four Asynchronous Endpoint Buffers Per
Transaction Translator
Supports Battery Charging
– CDP Mode (Upstream Port Connected)
– DCP Mode (Upstream Port Unconnected)
– DCP Mode Complies with Chinese
Telecommunications Industry Standard YD/T
1591-2009
– D+/D- Divider Mode
Supports Operation as a USB 3.0 or USB 2.0
Compound Device
Per Port or Ganged Power Switching and OverCurrent Notification Inputs
OTP ROM, Serial EEPROM or I2C/SMBus Slave
Interface for Custom Configurations:
– VID and PID
– Port Customizations
– Manufacturer and Product Strings (not by OTP
ROM)
– Serial Number (not by OTP ROM)
Application Feature Selection Using Pin Selection
or EEPROM/ or I2C/SMBus Slave Interface
Provides 128-Bit Universally Unique Identifier
(UUID)
Supports On-Board and In-System OTP/EEPROM
Programming Via the USB 2.0 Upstream Port
•
•
Single Clock Input, 24-MHz Crystal or Oscillator
No Special Driver Requirements; Works
Seamlessly on any Operating System with USB
Stack Support
64-Pin QFN Package (RGC)
•
2 Applications
•
•
•
•
Computer Systems
Docking Stations
Monitors
Set-Top Boxes
3 Description
The TUSB8041 is a four-port USB 3.0 hub. It
provides simultaneous SuperSpeed USB and highspeed/full-speed connections on the upstream port
and provides SuperSpeed USB, high-speed, fullspeed, or low-speed connections on the downstream
ports. When the upstream port is connected to an
electrical environment that only supports high-speed
or full-speed/low-speed connections, SuperSpeed
USB connectivity is disabled on the downstream
ports. When the upstream port is connected to an
electrical environment that only supports fullspeed/low-speed connections, SuperSpeed USB and
high-speed connectivity are disabled on the
downstream ports.
Device Information(1)
PART NUMBER
PACKAGE
TUSB8041
VQFN (64)
TUSB8041I
BODY SIZE (NOM)
9.00 mm × 9.00 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Diagram
USB 3.0
HDD
USB 2.0
Webcam
USB 2.0
Hub
Personal
Computer
USB 2.0
HDD
USB 1.1
Mouse
TUSB8041
USB 3.0
HDD
USB 2.0
USB 3.0
HDD
USB 3.0
Hub
USB 1.1
Keyboard
USB 2.0
Printer
USB 1.x Connection
USB 2.0 Connection
USB 3.0 Hub
USB 2.0 Device
USB 3.0 Connection
USB 3.0 Device
USB 1.x Device
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.
TUSB8041
SLLSEE4E – JUNE 2014 – REVISED JUNE 2016
www.ti.com
Table of Contents
1
2
3
4
5
6
7
Features ..................................................................
Applications ...........................................................
Description .............................................................
Revision History.....................................................
Description (Continued) ........................................
Pin Configuration and Functions .........................
Specifications.........................................................
7.1
7.2
7.3
7.4
7.5
7.6
7.7
8
1
1
1
2
3
4
9
Absolute Maximum Ratings ..................................... 9
ESD Ratings.............................................................. 9
Recommended Operating Conditions....................... 9
Thermal Information ................................................ 10
Electrical Characteristics, 3.3-V I/O ........................ 10
Timing Requirements, Power-Up............................ 11
Hub Input Supply Current ....................................... 11
Detailed Description ............................................ 12
8.1 Overview ................................................................. 12
8.2 Functional Block Diagram ....................................... 12
8.3 Feature Description................................................. 12
8.4 Device Functional Modes........................................ 15
8.5 Register Maps ......................................................... 17
9
Applications and Implementation ...................... 29
9.1 Application Information............................................ 29
9.2 Typical Application .................................................. 29
10 Power Supply Recommendations ..................... 37
10.1 TUSB8041 Power Supply ..................................... 37
10.2 Downstream Port Power ....................................... 37
10.3 Ground .................................................................. 37
11 Layout................................................................... 38
11.1 Layout Guidelines ................................................. 38
11.2 Layout Examples................................................... 39
12 Device and Documentation Support ................. 41
12.1
12.2
12.3
12.4
Community Resources..........................................
Trademarks ...........................................................
Electrostatic Discharge Caution ............................
Glossary ................................................................
41
41
41
41
13 Mechanical, Packaging, and Orderable
Information ........................................................... 41
4 Revision History
Changes from Revision D (January 2016) to Revision E
Page
•
Added SMBUS Programming current to the Hub Input Supply Current table ..................................................................... 11
•
Added Note to the SMBus Slave Operation section ............................................................................................................ 16
Changes from Revision C (July 2015) to Revision D
Page
•
Changed Active High. (PWRCTL_POL = 0) To: Active High. (PWRCTL_POL = 1) in Table 48 ........................................ 30
•
Changed text in the Clock, Reset, and Misc section From: "The PWRCTL_POL is pulled down which results in
active low" To: "The PWRCTL_POL is left unconnected which results in active high"........................................................ 34
•
Deleted R17 from pin 41 of Figure 11 ................................................................................................................................. 34
Changes from Revision A (July 2014) to Revision B
Page
•
Added Note ""Power switching must be supported for battery charging applications"" to pin FULLPWRMGMTz /
SMBA1/SS_UP in the Pin Functions table ............................................................................................................................. 7
•
Added Note "Individual power control must be enabled for battery charging applications" to pin GANGED / SMBA2 /
HS_UP in the Pin Functions table .......................................................................................................................................... 8
•
Changed the Handling Ratings table to the ESD Ratings table ............................................................................................. 9
•
Changed the Timing Requirements, Power-Up table: Deleted text from the td1 description: "There is no timing
relationship between VDD33 and VDD": Added Note 2 to the MIN value ........................................................................... 11
•
Added Note: "An active reset is required.." To the Timing Requirements, Power-Up table................................................. 11
•
Changed text in the Clock, Reset, and Misc section From: "The PWRCTL_POL is pulled down which results in
active high power enable" To: "The PWRCTL_POL is pulled down which results in active low power enable" ................. 34
2
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TUSB8041
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SLLSEE4E – JUNE 2014 – REVISED JUNE 2016
Changes from Original (June 2014) to Revision A
Page
•
Changed the device status From: Preview To: Production ................................................................................................... 1
•
Changed Feature From: Supports USB Battery Charging Specification Revision 1.2 To: Supports Battery Charging......... 1
•
Changed Feature From: Supports D+/D- Divider Mode To: D+/D- Divider Mode.................................................................. 1
•
Changed Description paragraph: "The TUSB8041 downstream ports provide...".................................................................. 3
•
Changed the Battery Charging Features section ................................................................................................................. 13
•
Changed Note 3 of Table 1 ................................................................................................................................................. 13
•
Changed Note 1 of Table 1 ................................................................................................................................................. 13
5 Description (Continued)
The TUSB8041 supports per port or ganged power switching and over-current protection, and supports battery
charging applications.
An individually port power controlled hub switches power on or off to each downstream port as requested by the
USB host. Also when an individually port power controlled hub senses an over-current event, only power to the
affected downstream port will be switched off.
A ganged hub switches on power to all its downstream ports when power is required to be on for any port. The
power to the downstream ports is not switched off unless all ports are in a state that allows power to be removed.
Also when a ganged hub senses an over-current event, power to all downstream ports will be switched off.
The TUSB8041 downstream ports provide support for battery charging applications by providing Battery
Charging Downstream Port (CDP) handshaking support. It also supports a Dedicated Charging Port (DCP) mode
when the upstream port is not connected. The DCP mode supports USB devices which support with the USB
Battery Charging and Chinese Telecommunications Industry Standard YD/T 1591-2009. In addition, an automatic
mode provides transparent support for BC devices and devices supporting Divider Mode charging solutions when
the upstream port unconnected.
The TUSB8041 provides pin strap configuration for some features including battery charging support, and also
provides customization though OTP ROM, I2C EEPROM or via an I2C/SMBus slave interface for PID, VID, and
custom port and phy configurations. Custom string support is also available when using an I2C EEPROM or the
I2C/SMBus slave interface.
The device is available in a 64-pin RGC package and is offered in a commercial version (TUSB8041) for
operation over the temperature range of 0°C to 70°C, and in an industrial version (TUSB8041I) for operation over
the temperature range of -40°C to 85°C.
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SLLSEE4E – JUNE 2014 – REVISED JUNE 2016
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6 Pin Configuration and Functions
USB_VBUS
OVERCUR2z
OVERCUR1z
AUTOENz/HS_SUSPEND
OVERCUR3z
OVERCUR4z
GANGED/SMBA2/HS_UP
PWRCTL_POL
FULLPWRMGMTz/SMBA1/SS_UP
SMBUSz/SS_SUSPEND
SCL/SMBCLK
SDA/SMBDAT
PWRCTL1/BATEN1
PWRCTL2/BATEN2
VDD33
PWRCTL3/BATEN3
RGC Package
64 Pin
(Top View)
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
TEST 49
32 PWRCTL4/BATEN4
GRSTz 50
31 VDD
VDD 51
30 USB_SSRXM_DN4
VDD33 52
29 USB_SSRXP_DN4
USB_DP_UP 53
28 VDD
USB_DM_UP 54
27 USB_SSTXM_DN4
USB_SSTXP_UP 55
26 USB_SSTXP_DN4
USB_SSTXM_UP 56
25 USB_DM_DN4
VSS
24 USB_DP_DN4
VDD 57
4
USB_SSRXP_UP 58
23 USB_SSRXM_DN3
USB_SSRXM_UP 59
22 USB_SSRXP_DN3
NC 60
21 VDD
XO 61
20 USB_SSTXM_DN3
XI 62
19 USB_SSTXP_DN3
5
6
7
8
9
10
11
12
VDD
USB_SSRXP_DN1
USB_SSRXM_DN1
VDD
USB_DP_DN2
USB_DM_DN2
USB_SSTXP_DN2
USB_SSTXM_DN2
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13
14
15
16
VDD33
4
USB_SSRXM_DN2
3
USB_SSRXP_DN2
2
VDD
1
USB_SSTXM_DN1
17 USB_DP_DN3
USB_SSTXP_DN1
USB_R1 64
USB_DM_DN1
18 USB_DM_DN3
USB_DP_DN1
VDD33 63
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TUSB8041
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SLLSEE4E – JUNE 2014 – REVISED JUNE 2016
Pin Functions
PIN
NAME
NO.
I/O
DESCRIPTION
Clock and Reset Signals
GRSTz
50
I
PU
Global power reset. This reset brings all of the TUSB8041 internal registers to their default
states. When GRSTz is asserted, the device is completely nonfunctional.
XI
62
I
Crystal input. This pin is the crystal input for the internal oscillator. The input may alternately
be driven by the output of an external oscillator. When using a crystal a 1-MΩ feedback
resistor is required between XI and XO.
XO
61
O
Crystal output. This pin is the crystal output for the internal oscillator. If XI is driven by an
external oscillator this pin may be left unconnected. When using a crystal a 1-MΩ feedback
resistor is required between XI and XO.
USB_SSTXP_UP
55
O
USB SuperSpeed transmitter differential pair (positive)
USB_SSTXM_UP
56
O
USB SuperSpeed transmitter differential pair (negative)
USB_SSRXP_UP
58
I
USB SuperSpeed receiver differential pair (positive)
USB_SSRXM_UP
59
I
USB SuperSpeed receiver differential pair (negative)
USB_DP_UP
53
I/O
USB High-speed differential transceiver (positive)
USB_DM_UP
54
I/O
USB High-speed differential transceiver (negative)
USB Upstream Signals
USB_R1
64
USB_VBUS
48
I
Precision resistor reference. A 9.53-kΩ ±1% resistor should be connected between USB_R1
and GND.
I
USB upstream port power monitor. The VBUS detection requires a voltage divider. The signal
USB_VBUS must be connected to VBUS through a 90.9-KΩ ±1% resistor, and to ground
through a 10-kΩ ±1% resistor from the signal to ground.
USB Downstream Signals
USB_SSTXP_DN1
3
O
USB SuperSpeed transmitter differential pair (positive)
USB_SSTXM_DN1
4
O
USB SuperSpeed transmitter differential pair (negative)
USB_SSRXP_DN1
6
I
USB SuperSpeed receiver differential pair (positive)
USB_SSRXM_DN1
7
I
USB SuperSpeed receiver differential pair (negative)
USB_DP_DN1
1
I/O
USB High-speed differential transceiver (positive)
USB_DM_DN1
2
I/O
USB High-speed differential transceiver (negative)
USB Port 1 Power On Control for Downstream Power/Battery Charging Enable. The pin is
used for control of the downstream power switch for Port 1.
PWRCTL1/BATEN1
36
In addition, the value of the pin is sampled at the de-assertion of reset to determine the value
I/O, PD of the battery charging support for Port 1 as indicated in the Battery Charging Support
register:
0 = Battery charging not supported
1 = Battery charging supported
USB Port 1 Over-Current Detection. This pin is used to connect the over current output of the
downstream port power switch for Port 1.
0 = An over current event has occurred
OVERCUR1z
46
I, PU
1 = An over current event has not occurred
This pin can be left unconnected if power management is not implemented. If power
management is enabled, the external circuitry needed should be determined by the power
switch.
USB_SSTXP_DN2
11
O
USB SuperSpeed transmitter differential pair (positive)
USB_SSTXM_DN2
12
O
USB SuperSpeed transmitter differential pair (negative)
USB_SSRXP_DN2
14
I
USB SuperSpeed receiver differential pair (positive)
USB_SSRXM_DN2
15
I
USB SuperSpeed receiver differential pair (negative)
USB_DP_DN2
9
I/O
USB High-speed differential transceiver (positive)
USB_DM_DN2
10
I/O
USB High-speed differential transceiver (negative)
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Pin Functions (continued)
PIN
NAME
NO.
I/O
DESCRIPTION
USB Port 2 Power On Control for Downstream Power/Battery Charging Enable. The pin is
used for control of the downstream power switch for Port 2.
PWRCTL2/BATEN2
35
In addition, the value of the pin is sampled at the de-assertion of reset to determine the value
I/O, PD of the battery charging support for Port 2 as indicated in the Battery Charging Support
register:
0 = Battery charging not supported
1 = Battery charging supported
USB Port 2 Over-Current Detection. This pin is used to connect the over current output of the
downstream port power switch for Port 2.
OVERCUR2z
47
I, PU
0 = An over current event has occurred
1 = An over current event has not occurred
This pin be left unconnected if power management is not implemented. If power management
is enabled, the external circuitry needed should be determined by the power switch.
USB_SSTXP_DN3
19
O
USB SuperSpeed transmitter differential pair (positive)
USB_SSTXM_DN3
20
O
USB SuperSpeed transmitter differential pair (negative)
USB_SSRXP_DN3
22
I
USB SuperSpeed receiver differential pair (positive)
USB_SSRXM_DN3
23
I
USB SuperSpeed receiver differential pair (negative)
USB_DP_DN3
17
I/O
USB High-speed differential transceiver (positive)
USB_DM_DN3
18
I/O
USB High-speed differential transceiver (negative)
USB Port 3 Power On Control for Downstream Power/Battery Charging Enable. The pin is
used for control of the downstream power switch for Port 3.
PWRCTL3/BATEN3
33
In addition, the value of the pin is sampled at the de-assertion of reset to determine the value
I/O, PD of the battery charging support for Port 3 as indicated in the Battery Charging Support
register:
0 = Battery charging not supported
1 = Battery charging supported
USB Port 3 Over-Current Detection. This pin is used to connect the over current output of the
downstream port power switch for Port 3.
0 = An over current event has occurred
OVERCUR3z
44
I, PU
1 = An over current event has not occurred
This pin can be left unconnected if power management is not implemented. If power
management is enabled, the external circuitry needed should be determined by the power
switch.
USB_SSTXP_DN4
26
O
USB SuperSpeed transmitter differential pair (positive)
USB_SSTXM_DN4
27
O
USB SuperSpeed transmitter differential pair (negative)
USB_SSRXP_DN4
29
I
USB SuperSpeed receiver differential pair (positive)
USB_SSRXM_DN4
30
I
USB SuperSpeed receiver differential pair (negative)
USB_DP_DN4
24
I/O
USB High-speed differential transceiver (positive)
USB_DM_DN4
25
I/O
USB High-speed differential transceiver (negative)
USB Port 4 Power On Control for Downstream Power/Battery Charging Enable. The pin is
used for control of the downstream power switch for Port 4.
PWRCTL4/BATEN4
32
In addition, the value of the pin is sampled at the de-assertion of reset to determine the value
I/O, PD of the battery charging support for Port 4 as indicated in the Battery Charging Support
register:
0 = Battery charging not supported
1 = Battery charging supported
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Pin Functions (continued)
PIN
NAME
NO.
I/O
DESCRIPTION
USB Port 4 Over-Current Detection. This pin is used to connect the over current output of the
downstream port power switch for Port 4.
0 = An over current event has occurred
OVERCUR4z
43
I, PU
1 = An over current event has not occurred
This pin can be left unconnected if power management is not implemented. If power
management is enabled, the external circuitry needed should be determined by the power
switch.
I2C/SMBUS Signals
I2C clock/SMBus clock. Function of pin depends on the setting of the SMBUSz input.
SCL/SMBCLK
38
When SMBUSz = 1, this pin acts as the serial clock interface for an I2C EEPROM.
I/O, PD
When SMBUSz = 0, this pin acts as the serial clock interface for an SMBus host.
Can be left unconnected if external interface not implemented.
I2C data/SMBus data. Function of pin depends on the setting of the SMBUSz input.
SDA/SMBDAT
37
When SMBUSz = 1, this pin acts as the serial data interface for an I2C EEPROM.
I/O, PD
When SMBUSz = 0, this pin acts as the serial data interface for an SMBus host.
Can be left unconnected if external interface not implemented.
I2C/SMBus mode select/SuperSpeed USB Suspend Status. The value of the pin is sampled
at the de-assertion of reset set I2C or SMBus mode as follows:
1 = I2C Mode Selected
SMBUSz/SS_SUSPEND
39
0 = SMBus Mode Selected
I/O, PU
Can be left unconnected if external interface not implemented.
After reset, this signal indicates the SuperSpeed USB Suspend status of the upstream port if
enabled through the Additional Feature Configuration register. When enabled a value of 1
indicates the connection is suspended.
Test and Miscellaneous Signals
Full power management enable/SMBus address bit 1/SuperSpeed USB Connection Status
Upstream port.
The value of the pin is sampled at the de-assertion of reset to set the power switch control
follows:
0 = Power switching and over current inputs supported
1 = Power switching and over current inputs not supported
FULLPWRMGMTz/
SMBA1/SS_UP
40
Full power management is the ability to control power to the downstream ports of the
I/O, PD TUSB8041 using PWRCTL[4:1]/BATEN[4:1].
When SMBus mode is enabled using SMBUSz, this pin sets the value of the SMBus slave
address bit 1.
Can be left unconnected if full power management and SMBus are not implemented.
After reset, this signal indicates the SuperSpeed USB connection status of the upstream port
if enabled through the Additional Feature Configuration register. When enabled a value of 1
indicates the upstream port is connected to a SuperSpeed USB capable port.
Note: Power switching must be supported for battery charging applications.
Power Control Polarity.
PWRCTL_POL
41
The value of the pin is sampled at the de-assertion of reset to set the polarity of
I/O, PU PWRCTL[4:1].
0 = PWRCTL polarity is active low
1 = PWRCTL polarity is active high
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Pin Functions (continued)
PIN
NAME
NO.
I/O
DESCRIPTION
Ganged operation enable/SMBus Address bit 2/HS Connection Status Upstream Port.
The value of the pin is sampled at the de-assertion of reset to set the power switch and over
current detection mode as follows:
0 = Individual power control supported when power switching is enabled
1 = Power control gangs supported when power switching is enabled
GANGED/SMBA2/
HS_UP
42
I/O, PD
When SMBus mode is enabled using SMBUSz, this pin sets the value of the SMBus slave
address bit 2.
After reset, this signal indicates the High-speed USB connection status of the upstream port if
enabled through the Additional Feature Configuration register. When enabled a value of 1
indicates the upstream port is connected to a High-speed USB capable port.
Note: Individual power control must be enabled for battery charging applications.
Automatic Charge Mode Enable/HS Suspend Status.
The value of the pin is sampled at the de-assertion of reset to determine if automatic mode is
enabled as follows:
AUTOENz/
HS_SUSPEND
45
I/O, PU
0 = Automatic Mode is enabled on ports that are enabled for battery charging when the
hub is unconnected. Please note that CDP is not supported on Port 1 when operating in
Automatic mode.
1 = Automatic Mode is disabled
This value is also used to set the autoEnz bit in the Battery Charging Support Register.
After reset, this signal indicates the High-speed USB Suspend status of the upstream port if
enabled through the Additional Feature Configuration register. When enabled a value of 1
indicates the connection is suspended.
TEST
49
I, PD
This pin is reserved for factory test.
VDD
5, 8,
13, 21,
28, 31,
51, 57
PWR
1.1-V power rail
VDD33
16, 34,
52, 63
PWR
3.3-V power rail
VSS
THERM
AL PAD
PWR
Ground. Thermal pad must be connected to ground.
NC
60
—
Power and Ground Signals
8
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No connect, leave floating
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TUSB8041
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7 Specifications
7.1 Absolute Maximum Ratings (1)
over operating free-air temperature range (unless otherwise noted)
Supply Voltage Range
Voltage Range
MIN
MAX
UNIT
VDD Steady-state supply voltage
–0.3
1.4
V
VDD33 Steady-state supply voltage
–0.3
3.8
V
USB_SSRXP_UP, USB_SSRXN_UP, USB_SSRXP_DN[4:1],
USB_SSRXN_DP[4:1] and USB_VBUS terminals
-0.3
1.4
V
XI terminals
-0.3
2.45
V
All other terminals
-0.3
3.8
V
–65
150
°C
Storage temperature, Tstg
(1)
Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings
only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended
Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
7.2 ESD Ratings
VALUE
Human body model (HBM), per ANSI/ESDA/JEDEC JS-001
V(ESD)
(1)
(2)
Electrostatic discharge
(1)
UNIT
±2000
Charged device model (CDM), per JEDEC specification JESD22C101 (2)
±500
V
JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.
JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process.
7.3 Recommended Operating Conditions
over operating free-air temperature range (unless otherwise noted)
MIN
NOM
MAX
UNIT
1.1V supply voltage
0.99
1.1
1.26
V
3.3V supply voltage
3
3.3
3.6
V
USB_VBUS
Voltage at USB_VBUS PAD
0
1.155
V
TA
Operating free-air temperature
TUSB8041
0
70
°C
TUSB8041I
–40
85
°C
TJ
Operating junction temperature
–40
105
°C
(1)
VDD33
VDD
(1)
A 1.05-V, 1.1-V, or 1.2-V supply may be used as long as minimum and maximum supply conditions are met.
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7.4 Thermal Information
TUSB8041
THERMAL METRIC (1)
RGC
UNIT
64 PINS
RθJA
Junction-to-ambient thermal resistance (2)
26
(3)
RθJCtop
Junction-to-case (top) thermal resistance
RθJB
Junction-to-board thermal resistance (4)
5.3
ψJT
Junction-to-top characterization parameter (5)
0.2
ψJB
Junction-to-board characterization parameter (6)
5.2
RθJCbot
Junction-to-case (bottom) thermal resistance (7)
1.0
(1)
(2)
(3)
(4)
(5)
(6)
(7)
11.5
°C/W
For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application
report (SPRA953).
The junction-to-ambient thermal resistance under natural convection is obtained in a simulation on a JEDEC-standard, high-K board, as
specified in JESD51-7, in an environment described in JESD51-2a.
The junction-to-case (top) thermal resistance is obtained by simulating a cold plate test on the package top. No specific JEDECstandard test exists, but a close description can be found in the ANSI SEMI standard G30-88.
The junction-to-board thermal resistance is obtained by simulating in an environment with a ring cold plate fixture to control the PCB
temperature, as described in JESD51-8.
The junction-to-top characterization parameter, ψJT, estimates the junction temperature of a device in a real system and is extracted
from the simulation data for obtaining RθJA, using a procedure described in JESD51-2a (sections 6 and 7).
The junction-to-board characterization parameter, ψJB, estimates the junction temperature of a device in a real system and is extracted
from the simulation data for obtaining RθJA, using a procedure described in JESD51-2a (sections 6 and 7).
The junction-to-case (bottom) thermal resistance is obtained by simulating a cold plate test on the exposed (power) pad. No specific
JEDEC standard test exists, but a close description can be found in the ANSI SEMI standard G30-88.
Spacer
7.5 Electrical Characteristics, 3.3-V I/O
over operating free-air temperature range (unless otherwise noted)
PARAMETER
VIH
High-level input voltage
OPERATION
(1)
VIL
Low-level input voltage (1)
VI
Input voltage
TEST CONDITIONS
VDD33
VDD33
JTAG pins only
(2)
MIN
MAX
UNIT
2
VDD33
V
0
0.8
0
0.55
0
VDD33
0
VDD33
V
0
25
ns
0.13 x VDD33
V
V
V
VO
Output voltage
tt
Input transition time (trise and tfall)
Vhys
Input hysteresis (3)
VOH
High-level output voltage
VDD33
IOH = -4 mA
VOL
Low-level output voltage
VDD33
IOL = 4 mA
0.4
V
IOZ
High-impedance, output current (2)
VDD33
VI = 0 to VDD33
±20
µA
IOZP
High-impedance, output current with
internal pullup or pulldown
resistor (4)
VDD33
VI = 0 to VDD33
±250
µA
II
Input current (5)
VDD33
VI = 0 to VDD33
±15
µA
(1)
(2)
(3)
(4)
(5)
10
2.4
V
Applies to external inputs and bidirectional buffers.
Applies to external outputs and bidirectional buffers.
Applies to GRSTz.
Applies to pins with internal pullups/pulldowns.
Applies to external input buffers.
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7.6 Timing Requirements, Power-Up
PARAMETER
DESCRIPTION
MIN
td1
VDD33 stable before VDD stable (1)
td2
VDD and VDD33 stable before de-assertion of GRSTz
tsu_io
Setup for MISC inputs (3) sampled at the de-assertion of GRSTz
(3)
MAX
UNIT
ms
3
ms
0.1
µs
thd_io
Hold for MISC inputs
tVDD33_RAMP
VDD33 supply ramp requirements
0.2
100
ms
tVDD_RAMP
VDD supply ramp requirements
0.2
100
ms
(1)
(2)
(3)
sampled at the de-assertion of GRSTz
TYP
(2)
See
0.1
µs
An active reset is required if the VDD33 supply is stable before the VDD11 supply. This active Reset shall meet the 3ms power-up delay
counting from both power supplies being stable to the de-assertion of GRSTz.
There is no power-on relationship between VDD33 and VDD unless GRSTz is only connected to a capacitor to GND. Then VDD must
be stable minimum of 10 μs before the VDD33.
MISC pins sampled at de-assertion of GRSTz: FULLPWRMGMTz, GANGED, PWRCTL_POL, SMBUSz, BATEN[4:1], and AUTOENz.
td2
GRSTz
VDD33
td1
VDD
tsu_io
thd_io
MISC_IO
Figure 2. Power-Up Timing Requirements
7.7 Hub Input Supply Current
Typical values measured at TA = 25°C
VDD33
VDD
3.3 V
1.1 V
Power On (after Reset)
2.3
28
mA
Upstream Disconnect
2.3
28
mA
Suspend
2.5
33
mA
3.0 host / 1 SS Device and Hub in U1 / U2
49
225
mA
3.0 host / 1 SS Device and Hub in U0
49
366
mA
3.0 host / 2 SS Devices and Hub in U1 / U2
49
305
mA
3.0 host / 2 SS Devices and Hub in U0
49
508
mA
3.0 host / 3 SS Devices and Hub in U1 / U2
49
380
mA
3.0 host / 3 SS Devices and Hub in U0
49
661
mA
3.0 host / 4 SS Devices and Hub in U1 / U2
49
455
mA
3.0 host / 4 SS Devices and Hub in U0
49
778
mA
3.0 host / 1 SS Device in U0 and 1 HS Device
85
395
mA
3.0 host / 2 SS Devices in U0 and 2 HS Devices
99
554
mA
2.0 host / HS Device
45
63
mA
2.0 host / 4 HS Devices
76
86
mA
SMBUS Programming current
79
225
mA
PARAMETER
UNIT
LOW POWER MODES
ACTIVE MODES (US state / DS State)
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8 Detailed Description
8.1 Overview
The TUSB8041 is a four-port USB 3.0 compliant hub. It provides simultaneous SuperSpeed USB and highspeed/full-speed connections on the upstream port and provides SuperSpeed USB, high-speed, full-speed, or
low-speed connections on the downstream ports. When the upstream port is connected to an electrical
environment that only supports high-speed or full-speed/low-speed connections, SuperSpeed USB connectivity is
disabled on the downstream ports. When the upstream port is connected to an electrical environment that only
supports full-speed/low-speed connections, SuperSpeed USB and high-speed connectivity are disabled on the
downstream ports.
8.2 Functional Block Diagram
Power
Distribution
VBUS
Detect
USB 2.0 Hub
XI
SuperSpeed Hub
Oscilator
USB_SSTXM_DN4
USB_SSTXP_DN4
USB_SSRXM_DN4
USB_SSRXP_DN4
USB_SSTXM_DN3
USB_SSTXP_DN3
USB_SSRXM_DN3
USB_SSRXP_DN3
USB_SSTXM_DN2
USB_SSTXP_DN2
USB_SSRXM_DN2
USB_SSRXP_DN2
USB_SSTXM_DN1
USB_SSTXP_DN1
USB DM DN4
_ _
USB_DP_DN4
USB_ DM_ DN3
USB_DP_DN3
USB_DP_DN2
USB_DM_DN2
USB_DP_DN1
USB_DM_DN1
Clock
and
Reset
Distribution
USB_SSRXM_DN1
USB_SSRXP_DN1
XO
GRSTz
USB_SSTXM_UP
USB_SSTXP_UP
USB_SSRXM_UP
USB_SSRXP_UP
VDD
VSS
USB_VBUS
USB_DM_UP
USB_DP_UP
USB_R1
VDD33
TEST
GANGED/SMBA2/HS_UP
FULLPWRMGMTz/SMBA1/SS_UP
PWRCTL_POL
SMBUSz/SS_SUSPEND
AUTOENz/HS_SUSPEND
SCL/SMBCLK
SDA/SMBDAT
OVERCUR1z
PWRCTL1/BATEN1
OVERCUR2z
PWRCTL2/BATEN2
GPIO
I 2C
SMBUS
Control
Registers
OTP
ROM
OVERCUR3z
PWRCTL3/BATEN3
OVERCUR4z
PWRCTL4/BATEN4
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8.3 Feature Description
8.3.1 Battery Charging Features
The TUSB8041 provides support for USB Battery Charging. Battery charging support may be enabled on a per
port basis through the REG_6h(batEn[3:0]).
Battery charging support includes both Charging Downstream Port (CDP) and Dedicated Charging Port (DCP)
modes. The DCP mode is compliant with the Chinese Telecommunications Industry Standard YD/T 1591-2009.
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Feature Description (continued)
In addition, to standard DCP mode, the TUSB8041 provides a mode (AUTOMODE) which automatically provides
support for DCP devices and devices that support custom charging indication. When in AUTOMODE, the port will
automatically switch between a divider mode and the DCP mode depending on the portable device connected.
The divided mode places a fixed DC voltage on the ports DP and DM signals which allows some devices to
identify the capabilities of the charger. The default divider mode indicates support for up to 5W. The divider mode
can be configured to report a high-current setting (up to 10 W) through REG_Ah (HiCurAcpModeEn).
The battery charging mode for each port is dependent on the state of Reg_6h(batEn[n]), the status of the VBUS
input, and the state of REG_Ah(autoModeEnz) upstream port as identified in Table 1.
Table 1. TUSB8041 Battery Charging Modes
batEn[n]
VBUS
autoModeEnz
0
Don’t Care
Don’t Care
1
4V
(1)
(2)
(3)
(4)
BC Mode Port x
(x = n + 1)
Don’t Care
0
Automode (1)
1
(3) (4)
DCP
(2)
CDP (3)
Don’t Care
Auto-mode automatically selects divider-mode or DCP mode.
Divider mode can be configured for high-current mode through register or OTP settings.
USB Device is USB Battery Charging Specification Revision 1.2 Compliant
USB Device is Chinese Telecommunications Industry Standard YD/T 1591-2009
8.3.2
USB Power Management
The TUSB8041 can be configured for power switched applications using either per-port or ganged power-enable
controls and over-current status inputs.
Power switch support is enabled by REG_5h (fullPwrMgmtz) and the per-port or ganged mode is configured by
REG_5h(ganged).
The TUSB8041 supports both active high and active low power-enable controls. The PWRCTL[4:1] polarity is
configured by REG_Ah(pwrctlPol).
8.3.3 One Time Programmable (OTP) Configuration
The TUSB8041 allows device configuration through one time programmable non-volatile memory (OTP). The
programming of the OTP is supported using vendor-defined USB device requests. For details using the OTP
features please contact your TI representative.
The table below provides a list features which may be configured using the OTP.
Table 2. OTP Configurable Features
CONFIGURATION REGISTER
OFFSET
BIT FIELD
DESCRIPTION
REG_01h
[7:0]
Vendor ID LSB
REG_02h
[7:0]
Vendor ID MSB
REG_03h
[7:0]
Product ID LSB
REG_04h
[7:0]
Product ID MSB
REG_07h
[0]
Port removable configuration for downstream ports 1. OTP
configuration is inverse of rmbl[3:0], i.e. 1 = not removable, 0 =
removable.
REG_07h
[1]
Port removable configuration for downstream ports 2. OTP
configuration is inverse of rmbl[3:0], i.e. 1 = not removable, 0 =
removable.
REG_07h
[2]
Port removable configuration for downstream ports 3. OTP
configuration is inverse of rmbl[3:0], i.e. 1 = not removable, 0 =
removable.
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Table 2. OTP Configurable Features (continued)
CONFIGURATION REGISTER
OFFSET
BIT FIELD
DESCRIPTION
REG_07h
[3]
Port removable configuration for downstream ports 4. OTP
configuration is inverse of rmbl[3:0], i.e. 1 = not removable, 0 =
removable.
REG_0Ah
[3]
Enable Device Attach Detection..
REG_0Ah
[4]
High-current divider mode enable.
REG_0Bh
[0]
USB 2.0 port polarity configuration for downstream ports 1.
REG_0Bh
[1]
USB 2.0 port polarity configuration for downstream ports 2.
REG_0Bh
[2]
USB 2.0 port polarity configuration for downstream ports 3.
REG_0Bh
[3]
USB 2.0 port polarity configuration for downstream ports 4.
REG_F0h
[3:1]
USB power switch power-on delay.
8.3.4 Clock Generation
The TUSB8041 accepts a crystal input to drive an internal oscillator or an external clock source. If a clock is
provided to XI instead of a crystal, XO is left open. Otherwise, if a crystal is used, the connection needs to follow
the guidelines below. Since XI and XO are coupled to other leads and supplies on the PCB, it is important to
keep them as short as possible and away from any switching leads. It is also recommended to minimize the
capacitance between XI and XO. This can be accomplished by shielding C1 and C2 with the clean ground lines.
R1
1M
Y1
XI
24 MHz
TUSB8041
CLOCK
XO
CL1
CL2
Figure 3. TUSB8041 Clock
8.3.5 Crystal Requirements
The crystal must be fundamental mode with load capacitance of 12 pF - 24 pF and frequency stability rating of
±100 PPM or better. To ensure proper startup oscillation condition, a maximum crystal equivalent series
resistance (ESR) of 50 Ω is recommended. A parallel load capacitor should be used if a crystal source is used.
The exact load capacitance value used depends on the crystal vendor. Refer to application note Selection and
Specification for Crystals for Texas Instruments USB2.0 devices (SLLA122) for details on how to determine the
load capacitance value.
8.3.6 Input Clock Requirements
When using an external clock source such as an oscillator, the reference clock should have a ±100 PPM or
better frequency stability and have less than 50-ps absolute peak to peak jitter or less than 25-ps peak to peak
jitter after applying the USB 3.0 jitter transfer function. XI should be tied to the 1.8-V clock source and XO should
be left floating.
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8.3.7 Power-Up and Reset
The TUSB8041 does not have specific power sequencing requirements with respect to the core power (VDD) or
I/O and analog power (VDD33). The core power (VDD) or I/O power (VDD33) may be powered up for an
indefinite period of time while the other is not powered up if all of these constraints are met:
• All maximum ratings and recommended operating conditions are observed.
• All warnings about exposure to maximum rated and recommended conditions are observed, particularly
junction temperature. These apply to power transitions as well as normal operation.
• Bus contention while VDD33 is powered up must be limited to 100 hours over the projected life-time of the
device.
• Bus contention while VDD33 is powered down may violate the absolute maximum ratings.
A supply bus is powered up when the voltage is within the recommended operating range. It is powered down
when it is below that range, either stable or in transition.
A minimum reset duration of 3 ms is required. This is defined as the time when the power supplies are in the
recommended operating range to the de-assertion of GRSTz. This can be generated using programmable-delay
supervisory device or using an RC circuit.
8.4 Device Functional Modes
8.4.1 External Configuration Interface
The TUSB8041 supports a serial interface for configuration register access. The device may be configured by an
attached I2C EEPROM or accessed as a slave by an SMBus capable host controller. The external interface is
enabled when both the SCL/SMBCLK and SDA/SMBDAT pins are pulled up to 3.3 V at the de-assertion of reset.
The mode, I2C master or SMBus slave, is determined by the state of SMBUSz/SS_SUSPEND pin at reset.
8.4.2 I2C EEPROM Operation
The TUSB8041 supports a single-master, standard mode (100 kbit/s) connection to a dedicated I2C EEPROM
when the I2C interface mode is enabled. In I2C mode, the TUSB8041 reads the contents of the EEPROM at bus
address 1010000b using 7-bit addressing starting at address 0.
If the value of the EEPROM contents at byte 00h equals 55h, the TUSB8041 loads the configuration registers
according to the EEPROM map. If the first byte is not 55h, the TUSB8041 exits the I2C mode and continues
execution with the default values in the configuration registers. The hub will not connect on the upstream port
until the configuration is completed. If the hub detected an un-programmed EEPROM (value other than 55h), the
hub will enter Programming Mode and a Programming Endpoint within the hub will be enabled.
Note, the bytes located above offset Ah are optional. The requirement for data in those addresses is dependent
on the options configured in the Device Configuration, and Device Configuration 2 registers.
For details on I2C operation refer to the UM10204 I2C-bus Specification and User Manual.
8.4.3 SMBus Slave Operation
When the SMBus interface mode is enabled, the TUSB8041 supports read block and write block protocols as a
slave-only SMBus device.
The TUSB8041 slave address is 1000 1xyz, where:
• x is the state of GANGED/SMBA2/HS_UP pin at reset,
• y is the state of FULLPWRMGMTz/SMBA1/SS_UP pin at reset, and
• z is the read/write bit; 1 = read access, 0 = write access.
If the TUSB8041 is addressed by a host using an unsupported protocol it will not respond. The TUSB8041 will
wait indefinitely for configuration by the SMBus host and will not connect on the upstream port until the SMBus
host indicates configuration is complete by clearing the CFG_ACTIVE bit.
For details on SMBus requirements refer to the System Management Bus Specification.
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Device Functional Modes (continued)
NOTE
During the SMBUS configuration the hub may draw an extra current, this extra current
consumption will end as soon as the CFG_ACTIVE bit is cleared. For more information,
see Hub Input Supply Current Section in this datasheet.
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8.5 Register Maps
8.5.1 Configuration Registers
The internal configuration registers are accessed on byte boundaries. The configuration register values are
loaded with defaults but can be over-written when the TUSB8041 is in I2C or SMBus mode.
Table 3. TUSB8041 Register Map
BYTE
ADDRESS
CONTENTS
00h
ROM Signature Register
No
01h
Vendor ID LSB
Yes
02h
Vendor ID MSB
Yes
03h
Product ID LSB
Yes
04h
Product ID MSB
Yes
05h
Device Configuration Register
Yes
06h
Battery Charging Support Register
Yes
07h
Device Removable Configuration Register
Yes
08h
Port Used Configuration Register
Yes
09h
Reserved
Yes, program to 00h
0Ah
Device Configuration Register 2
Yes
0Bh
USB 2.0 Port Polarity Control Register
Yes
0Ch-0Fh
Reserved
No
EEPROM CONFIGURABLE
10h-1Fh
UUID Byte [15:0]
No
20h-21h
LangID Byte [1:0]
Yes, if customStrings is set
22h
Serial Number String Length
Yes, if customSerNum is set
23h
Manufacturer String Length
Yes, if customStrings is set
Yes, if customStrings is set
24h
Product String Length
25h-2Fh
Reserved
No
30h-4Fh
Serial Number String Byte [31:0]
Yes, if customSerNum is set
50h-8Fh
Manufacturer String Byte [63:0]
Yes, if customStrings is set
90h-CFh
Product String Byte [63:0]
Yes, if customStrings is set
D0-DFh
Reserved
No
F0h
Additional Feature Configuration Register
Yes
F1-F7h
Reserved
No
F8h
Device Status and Command Register
No
F9-FFh
Reserved
No
8.5.2 ROM Signature Register
Table 4. Register Offset 0h
Bit No.
7
6
5
4
3
2
1
0
Reset State
0
0
0
0
0
0
0
0
Table 5. Bit Descriptions – ROM Signature Register
Bit
7:0
Field Name
romSignature
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Access
Description
RW
ROM Signature Register. This register is used by the TUSB8041 in I2C
mode to validate the attached EEPROM has been programmed. The first
byte of the EEPROM is compared to the mask 55h and if not a match,
the TUSB8041 aborts the EEPROM load and executes with the register
defaults.
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8.5.3 Vendor ID LSB Register
Table 6. Register Offset 1h
Bit No.
7
6
5
4
3
2
1
0
Reset State
0
1
0
1
0
0
0
1
Table 7. Bit Descriptions – Vendor ID LSB Register
Bit
7:0
Field Name
vendorIdLsb
Access
Description
RO/RW
Vendor ID LSB. Least significant byte of the unique vendor ID assigned
by the USB-IF; the default value of this register is 51h representing the
LSB of the TI Vendor ID 0451h. The value may be over-written to
indicate a customer Vendor ID.
This field is read/write unless the OTP ROM VID and OTP ROM PID
values are non-zero. If both values are non-zero the value when reading
this register shall reflect the OTP ROM value.
8.5.4 Vendor ID MSB Register
Table 8. Register Offset 2h
Bit No.
7
6
5
4
3
2
1
0
Reset State
0
0
0
0
0
1
0
0
Table 9. Bit Descriptions – Vendor ID MSB Register
Bit
7:0
Field Name
vendorIdMsb
Access
Description
RO/RW
Vendor ID MSB. Most significant byte of the unique vendor ID assigned
by the USB-IF; the default value of this register is 04h representing the
MSB of the TI Vendor ID 0451h. The value may be over-written to
indicate a customer Vendor ID.
This field is read/write unless the OTP ROM VID and OTP ROM PID
values are non-zero. If both values are non-zero the value when reading
this register shall reflect the OTP ROM value.
8.5.5 Product ID LSB Register
Table 10. Register Offset 3h
Bit No.
7
6
5
4
3
2
1
0
Reset State
0
1
0
0
0
0
0
0
Table 11. Bit Descriptions – Product ID LSB Register
Bit
7:0
18
Field Name
productIdLsb
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Access
Description
RO/RW
Product ID LSB. Least significant byte of the product ID assigned by
Texas Instruments and reported in the SuperSpeed Device descriptor.
the default value of this register is 40h representing the LSB of the
SuperSpeed product ID assigned by Texas Instruments The value
reported in the USB 2.0 Device descriptor is the value of this register bit
wise XORed with 00000010b. The value may be over-written to indicate
a customer product ID.
This field is read/write unless the OTP ROM VID and OTP ROM PID
values are non-zero. If both values are non-zero the value when reading
this register will reflect the OTP ROM value.
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8.5.6 Product ID MSB Register
Table 12. Register Offset 4h
Bit No.
7
6
5
4
3
2
1
0
Reset State
1
0
0
0
0
0
0
1
Table 13. Bit Descriptions – Product ID MSB Register
Bit
7:0
Field Name
productIdMsb
Access
Description
RO/RW
Product ID MSB. Most significant byte of the product ID assigned by
Texas Instruments; the default value of this register is 81h representing
the MSB of the product ID assigned by Texas Instruments. The value
may be over-written to indicate a customer product ID.
This field is read/write unless the OTP ROM VID and OTP ROM PID
values are non-zero. If both values are non-zero, the value when reading
this register will reflect the OTP ROM value.
8.5.7 Device Configuration Register
Table 14. Register Offset 5h
Bit No.
7
6
5
4
3
2
1
0
Reset State
0
0
0
1
X
X
0
0
Table 15. Bit Descriptions – Device Configuration Register
Bit
Field Name
Access
Description
Custom strings enable. This bit controls the ability to write to the
Manufacturer String Length, Manufacturer String, Product String Length,
Product String, and Language ID registers
7
customStrings
RW
0 = The Manufacturer String Length, Manufacturer String, Product
String Length, Product String, and Language ID registers are read
only
1 = The Manufacturer String Length, Manufacturer String, Product
String Length, Product String, and Language ID registers may be
loaded by EEPROM or written by SMBus
The default value of this bit is 0.
Custom serial number enable. This bit controls the ability to write to the
serial number registers.
6
customSernum
RW
0 = The Serial Number String Length and Serial Number String
registers are read only
1 = Serial Number String Length and Serial Number String registers
may be loaded by EEPROM or written by SMBus
The default value of this bit is 0.
U1 U2 Disable. This bit controls the U1/U2 support.
0 = U1/U2 support is enabled
5
u1u2Disable
RW
1 = U1/U2 support is disabled, the TUSB8041 will not initiate or
accept any U1 or U2 requests on any port, upstream or downstream,
unless it receives or sends a Force_LinkPM_Accept LMP. After
receiving or sending an FLPMA LMP, it will continue to enable U1
and U2 according to USB 3.0 protocol until it gets a power-on reset
or is disconnected on its upstream port.
When the TUSB8041 is in I2C mode, the TUSB8041 loads this bit from
the contents of the EEPROM.
When the TUSB8041 is in SMBUS mode, the value may be over-written
by an SMBus host.
4
RSVD
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RO
Reserved. This bit is reserved and returns 1 when read.
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Table 15. Bit Descriptions – Device Configuration Register (continued)
Ganged. This bit is loaded at the de-assertion of reset with the value of
the GANGED/SMBA2/HS_UP pin.
0 = When fullPwrMgmtz = 0, each port is individually power switched
and enabled by the PWRCTL[4:1]/BATEN[4:1] pins
3
ganged
1 = When fullPwrMgmtz = 0, the power switch control for all ports is
ganged and enabled by the PWRCTL[4:1]/BATEN1 pin
RW
When the TUSB8041 is in I2C mode, the TUSB8041 loads this bit from
the contents of the EEPROM.
When the TUSB8041 is in SMBUS mode, the value may be over-written
by an SMBus host.
Full Power Management. This bit is loaded at the de-assertion of reset
with the value of the FULLPWRMGMTz/SMBA1/SS_UP pin.
0 = Port power switching status reporting is enabled
2
fullPwrMgmtz
RW
1 = Port power switching status reporting is disabled
When the TUSB8041 is in I2C mode, the TUSB8041 loads this bit from
the contents of the EEPROM.
When the TUSB8041 is in SMBUS mode, the value may be over-written
by an SMBus host.
1
RSVD
RW
Reserved. This field is reserved and should not be altered from the
default.
0
RSVD
RO
Reserved. This field is reserved and returns 0 when read.
8.5.8 Battery Charging Support Register
Table 16. Register Offset 6h
Bit No.
7
6
5
4
3
2
1
0
Reset State
0
0
0
0
X
X
X
X
Table 17. Bit Descriptions – Battery Charging Support Register
Bit
Field Name
Access
7:4
RSVD
RO
Description
Reserved. Read only, returns 0 when read.
Battery Charger Support. The bits in this field indicate whether the
downstream port implements the charging port features.
0 = The port is not enabled for battery charging support features
1 = The port is enabled for battery charging support features
3:0
batEn[3:0]
RW
Each bit corresponds directly to a downstream port, i.e. batEn0
corresponds to downstream port 1, and batEN1 corresponds to
downstream port 2.
The default value for these bits are loaded at the de-assertion of reset
with the value of PWRCTL/BATEN[3:0].
When in I2C/SMBus mode the bits in this field may be over-written by
EEPROM contents or by an SMBus host.
20
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8.5.9 Device Removable Configuration Register
Table 18. Register Offset 7h
Bit No.
7
6
5
4
3
2
1
0
Reset State
0
0
0
0
X
X
X
X
Table 19. Bit Descriptions – Device Removable Configuration Register
Bit
Field Name
Access
Description
Custom Removable. This bit controls the ability to write to the port
removable bits.
7
customRmbl
0 = rmbl[3:0] are read only and the values are loaded from the OTP
ROM
RW
1 = rmbl[3:0] are read/write and can be loaded by EEPROM or
written by SMBus
This bit may be written simultaneously with rmbl[3:0].
6:4
RSVD
RO
Reserved. Read only, returns 0 when read.
Removable. The bits in this field indicate whether a device attached to
downstream ports 4 through 1 are removable or permanently attached.
0 = The device attached to the port is not removable
1 = The device attached to the port is removable
3:0
rmbl[3:0]
RW
Each bit corresponds directly to a downstream port n + 1, i.e. rmbl0
corresponds to downstream port 1, rmbl1 corresponds to downstream
port 2, etc.
This field is read only unless the customRmbl bit is set to 1. Otherwise
the value of this filed reflects the inverted values of the OTP ROM
non_rmb[3:0] field.
8.5.10 Port Used Configuration Register
Table 20. Register Offset 8h
Bit No.
7
6
5
4
3
2
1
0
Reset State
0
0
0
0
1
1
1
1
Table 21. Bit Descriptions – Port Used Configuration Register
Bit
Field Name
Access
7:4
RSVD
RO
Description
Reserved. Read only.
Used. The bits in this field indicate whether a port is enabled.
0 = The port is disabled
3:0
used[3:0]
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RW
1 = The port is enabled
Each bit corresponds directly to a downstream port, i.e. used0
corresponds to downstream port 1, used1 corresponds to downstream
port 2, etc. All combinations are supported with the exception of both
ports 1 and 3 marked as disabled.
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8.5.11 Device Configuration Register 2
Table 22. Register Offset Ah
Bit No.
7
6
5
4
3
2
1
0
Reset State
0
0
X
0
0
0
X
0
Table 23. Bit Descriptions – Device Configuration Register 2
Bit
7
Field Name
Reserved
Access
RO
Description
Reserved. Read-only, returns 0 when read.
Custom Battery Charging Feature Enable. This bit controls the ability to
write to the battery charging feature configuration controls.
6
customBCfeatures
RW
0 = The HiCurAcpModeEn and cpdEN bits are read only and the
values are loaded from the OTP ROM.
1 = The HiCurAcpModeEn and cpdEN, bits are read/write and can
be loaded by EEPROM or written by SMBus. from this register.
This bit may be written simultaneously with HiCurAcpModeEn and
cpdEN.
Power enable polarity. This bit is loaded at the de-assertion of reset with
the value of the PWRCTL_POL pin.
0 = PWRCTL polarity is active low
5
pwrctlPol
RW
1 = PWRCTL polarity is active high
When the TUSB8041 is in I2C mode, the TUSB8041 loads this bit from
the contents of the EEPROM.
When the TUSB8041 is in SMBUS mode, the value may be over-written
by an SMBus host.
High-current ACP mode enable. This bit enables the high-current tablet
charging mode when the automatic battery charging mode is enabled for
downstream ports.
4
HiCurAcpModeEn
RO/RW
0 = High current divider mode disabled
1 = High current divider mode enabled
This bit is read only unless the customBCfeatures bit is set to 1. If
customBCfeatures is 0, the value of this bit reflects the value of the OTP
ROM HiCurAcpModeEn bit.
Enable Device Attach Detection. This bit enables device attach detection
(aka, cell phone detect) when autoMode is enabled.
0 = Device Attach detect is disabled in automode.
3
cpdEN
RORW
1 = Device Attach detect is enabled in automode..
This bit is read only unless the customBCfeatures bit is set to 1. If
customBCfeatures is 0 the value of this bit reflects the value of the OTP
ROM cpdEN bit.
DSPORT ECR Enable. This bit enables full implementation of the
DSPORT ECR (April 2013).
2
dsportEcr_en
RW
0 = The DSPORT ECR (April 2013) is enabled with exception of the
following: Changes related to when CCS bit is set upon entering U0,
and Changes related to avoiding or reporting compliance mode entry
1 = The full DSPORT ECR (April 2013) is enabled.
The default value of this bit is 0. The value returned from this register will
be the OR of this bit and the OTP ROM dsport_ecr_en bit.
22
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Table 23. Bit Descriptions – Device Configuration Register 2 (continued)
Automatic Mode Enable. This bit is loaded at the de-assertion of reset
with the value of the AUTOENz/HS_SUSPEND pin.
The automatic mode only applies to downstream ports with battery
charging enabled when the upstream port is not connected. Under these
conditions:
1
autoModeEnz
0 = Automatic mode battery charging features are enabled.
RW
1 = Automatic mode is disabled; only Battery Charging DCP and
CDP mode is supported.
NOTE: When the upstream port is connected, Battery Charging CDP
mode will be supported on all ports that enabled for battery charging
support regardless of the value of this bit with the exception of Port 1.
CDP on Port 1 is not supported when Automatic Mode is enabled.
0
RSVD
RO
Reserved. Read only, returns 0 when read.
8.5.12 USB 2.0 Port Polarity Control Register
Table 24. Register Offset Bh
Bit No.
7
6
5
4
3
2
1
0
Reset State
0
0
0
0
0
0
0
0
Table 25. Bit Descriptions – USB 2.0 Port Polarity Control Register
Bit
Field Name
Access
Description
Custom USB 2.0 Polarity. This bit controls the ability to write the
p[4:0]_usb2pol bits.
7
customPolarity
RW
0 = The p[4:0]_usb2pol bits are read only and the values are loaded
from the OTP ROM.
1 = The p[4:0]_usb2pol bits are read/write and can be loaded by
EEPROM or written by SMBus. from this register
This bit may be written simultaneously with the p[4:0]_usb2pol bits
6:5
RSVD
RO
Reserved. Read only, returns 0 when read.
Downstream Port 4 DM/DP Polarity. This controls the polarity of the port.
0 = USB 2.0 port polarity is as documented by the pin out
4
p4_usb2pol
RO/RW
1 = USB 2.0 port polarity is swapped from that documented in the
pin out, i.e. DM becomes DP, and DP becomes DM.
This bit is read only unless the customPolarity bit is set to 1. If
customPolarity is 0 the value of this bit reflects the value of the OTP
ROM p4_usb2pol bit.
Downstream Port 3 DM/DP Polarity. This controls the polarity of the port.
0 = USB 2.0 port polarity is as documented by the pin out
3
p3_usb2pol
RO/RW
1 = USB 2.0 port polarity is swapped from that documented in the
pin out, i.e. DM becomes DP, and DP becomes DM.
This bit is read only unless the customPolarity bit is set to 1. If
customPolarity is 0 the value of this bit reflects the value of the OTP
ROM p3_usb2pol bit.
Downstream Port 2 DM/DP Polarity. This controls the polarity of the port.
0 = USB 2.0 port polarity is as documented by the pin out
2
p2_usb2pol
RO/RW
1 = USB 2.0 port polarity is swapped from that documented in the
pin out, i.e. DM becomes DP, and DP becomes DM.
This bit is read only unless the customPolarity bit is set to 1. If
customPolarity is 0 the value of this bit reflects the value of the OTP
ROM p2_usb2pol bit.
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Table 25. Bit Descriptions – USB 2.0 Port Polarity Control Register (continued)
Downstream Port 1 DM/DP Polarity. This controls the polarity of the port.
0 = USB 2.0 port polarity is as documented by the pin out
1
p1_usb2pol
1 = USB 2.0 port polarity is swapped from that documented in the
pin out, i.e. DM becomes DP, and DP becomes DM.
RORW
This bit is read only unless the customPolarity bit is set to 1. If
customPolarity is 0 the value of this bit reflects the value of the OTP
ROM p1_usb2pol bit.
Upstream Port DM/DP Polarity. This controls the polarity of the port.
0 = USB 2.0 port polarity is as documented by the pin out
0
p0_usb2pol
1 = USB 2.0 port polarity is swapped from that documented in the
pin out, i.e. DM becomes DP, and DP becomes DM.
RO/RW
This bit is read only unless the customPolarity bit is set to 1. If
customPolarity is 0 the value of this bit reflects the value of the OTP
ROM p0_usb2pol bit.
8.5.13 UUID Registers
Table 26. Register Offset 10h-1Fh
Bit No.
7
6
5
4
3
2
1
0
Reset State
X
X
X
X
X
X
X
X
Table 27. Bit Descriptions – UUID Byte N Register
Bit
7:0
Field Name
Access
uuidByte[n]
RO
Description
UUID byte N. The UUID returned in the Container ID descriptor. The
value of this register is provided by the device and is meets the UUID
requirements of Internet Engineering Task Force (IETF) RFC 4122 A
UUID URN Namespace.
8.5.14 Language ID LSB Register
Table 28. Register Offset 20h
Bit No.
7
6
5
4
3
2
1
0
Reset State
0
0
0
0
1
0
0
1
Table 29. Bit Descriptions – Language ID LSB Register
Bit
7:0
24
Field Name
langIdLsb
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Access
RO/RW
Description
Language ID least significant byte. This register contains the value
returned in the LSB of the LANGID code in string index 0. The
TUSB8041 only supports one language ID. The default value of this
register is 09h representing the LSB of the LangID 0409h indicating
English United States.
When customStrings is 1, this field may be over-written by the contents
of an attached EEPROM or by an SMBus host.
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8.5.15 Language ID MSB Register
Table 30. Register Offset 21h
Bit No.
7
6
5
4
3
2
1
0
Reset State
0
0
0
0
0
1
0
0
Table 31. Bit Descriptions – Language ID MSB Register
Bit
7:0
Field Name
Access
langIdMsb
RO/RW
Description
Language ID most significant byte. This register contains the value
returned in the MSB of the LANGID code in string index 0. The
TUSB8041 only supports one language ID. The default value of this
register is 04h representing the MSB of the LangID 0409h indicating
English United States.
When customStrings is 1, this field may be over-written by the contents
of an attached EEPROM or by an SMBus host.
8.5.16 Serial Number String Length Register
Table 32. Register Offset 22h
Bit No.
7
6
5
4
3
2
1
0
Reset State
0
0
0
1
1
0
0
0
Table 33. Bit Descriptions – Serial Number String Length Register
Bit
Field Name
Access
7:6
RSVD
RO
5:0
serNumStringLen
RO/RW
Description
Reserved. Read only, returns 0 when read.
Serial number string length. The string length in bytes for the serial
number string. The default value is 18h indicating that a 24 byte serial
number string is supported. The maximum string length is 32 bytes.
When customSernum is 1, this field may be over-written by the contents
of an attached EEPROM or by an SMBus host.
When the field is non-zero, a serial number string of serNumbStringLen
bytes is returned at string index 1 from the data contained in the Serial
Number String registers.
8.5.17 Manufacturer String Length Register
Table 34. Register Offset 23h
Bit No.
7
6
5
4
3
2
1
0
Reset State
0
0
0
0
0
0
0
0
Table 35. Bit Descriptions – Manufacturer String Length Register
Bit
Field Name
Access
7
RSVD
RO
6:0
mfgStringLen
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RO/RW
Description
Reserved. Read only, returns 0 when read.
Manufacturer string length. The string length in bytes for the
manufacturer string. The default value is 0, indicating that a manufacturer
string is not provided. The maximum string length is 64 bytes.
When customStrings is 1, this field may be over-written by the contents
of an attached EEPROM or by an SMBus host.
When the field is non-zero, a manufacturer string of mfgStringLen bytes
is returned at string index 3 from the data contained in the Manufacturer
String registers.
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8.5.18 Product String Length Register
Table 36. Register Offset 24h
Bit No.
7
6
5
4
3
2
1
0
Reset State
0
0
0
0
0
0
0
0
Table 37. Bit Descriptions – Product String Length Register
Bit
Field Name
Access
7
RSVD
RO
6:0
prodStringLen
RO/RW
Description
Reserved. Read only, returns 0 when read.
Product string length. The string length in bytes for the product string.
The default value is 0, indicating that a product string is not provided.
The maximum string length is 64 bytes.
When customStrings is 1, this field may be over-written by the contents
of an attached EEPROM or by an SMBus host.
When the field is non-zero, a product string of prodStringLen bytes is
returned at string index 3 from the data contained in the Product String
registers.
8.5.19 Serial Number String Registers
Table 38. Register Offset 30h-4Fh
Bit No.
7
6
5
4
3
2
1
0
Reset State
X
X
x
x
x
x
x
x
Table 39. Bit Descriptions – Serial Number Registers
Bit
7:0
Field Name
Access
serialNumber[n]
RO/RW
Description
Serial Number byte N. The serial number returned in the Serial Number
string descriptor at string index 1. The default value of these registers is
assigned by TI. When customSernum is 1, these registers may be overwritten by EEPROM contents or by an SMBus host.
8.5.20 Manufacturer String Registers
Table 40. Register Offset 50h-8Fh
Bit No.
7
6
5
4
3
2
1
0
Reset State
0
0
0
0
0
0
0
0
Table 41. Bit Descriptions – Manufacturer String Registers
Bit
7:0
26
Field Name
mfgStringByte[n]
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Access
RW
Description
Manufacturer string byte N. These registers provide the string values
returned for string index 3 when mfgStringLen is greater than 0. The
number of bytes returned in the string is equal to mfgStringLen.
The programmed data should be in UNICODE UTF-16LE encodings as
defined by The Unicode Standard, Worldwide Character Encoding,
Version 5.0.
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8.5.21 Product String Registers
Table 42. Register Offset 90h-CFh
Bit No.
7
6
5
4
3
2
1
0
Reset State
0
0
0
0
0
0
0
0
Table 43. Bit Descriptions – Product String Byte N Register
Bit
7:0
Field Name
prodStringByte[n]
Access
Description
RO/RW
Product string byte N. These registers provide the string values returned
for string index 2 when prodStringLen is greater than 0. The number of
bytes returned in the string is equal to prodStringLen.
The programmed data should be in UNICODE UTF-16LE encodings as
defined by The Unicode Standard, Worldwide Character Encoding,
Version 5.0.
8.5.22 Additional Feature Configuration Register
Table 44. Register Offset F0h
Bit No.
7
6
5
4
3
2
1
0
Reset State
0
0
0
0
0
0
0
0
Table 45. Bit Descriptions – Additional Feature Configuration Register
Bit
Field Name
Access
7:5
RSVD
RO
4
stsOutputEn
RO/RW
Description
Reserved. Read only, returns 0 when read.
Status output enable. This bit enables the HS, HS_SUSPEND, SS, and
SS_SUSPEND outputs..
0 = HS, HS_SUSPEND, SS, and SS_SUSPEND outputs are
disabled and tri-stated.
1 = HS, HS_SUSPEND, SS, and SS_SUSPEND outputs are
enabled.
This field may be over-written by EEPROM contents or by an SMBus
Host.
3:1
pwronTime
RW
Power On Delay Time. When OTP ROM pwronTime field is all zero , this
field sets the delay time from the removal disable of PWRCTL to the
enable of PWRCTL when transitioning battery charging modes. For
example, when disabling the power on a transition from a custom
charging mode to Dedicated Charging Port Mode. The nominal timing is
defined as follows:
TPWRON_EN = (pwronTime + 1) x 200 ms
(1)
This field may be over-written by EEPROM contents or by an SMBus
host.
USB3 Spread Spectrum Disable. This bit allows firmware to disable the
spread spectrum function of the USB3 phy PLL.
0
usb3spreadDis
RW
0 = Spread spectrum function is enabled
1= Spread spectrum function is disabled
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8.5.23 Device Status and Command Register
Table 46. Register Offset F8h
Bit No.
7
6
5
4
3
2
1
0
Reset State
0
0
0
0
0
0
0
0
Table 47. Bit Descriptions – Device Status and Command Register
Bit
Field Name
Access
7:2
RSVD
RO
1
smbusRst
RSU
SMBus interface reset. This bit loads the registers back to their GRSTz
values.
This bit is set by writing a 1 and is cleared by hardware on completion of
the reset. A write of 0 has no effect.
RCU
Configuration active. This bit indicates that configuration of the
TUSB8041 is currently active. The bit is set by hardware when the
device enters the I2C or SMBus mode. The TUSB8041 shall not connect
on the upstream port while this bit is 1.
When in the SMBus mode, this bit must be cleared by the SMBus host in
order to exit the configuration mode and allow the upstream port to
connect.
The bit is cleared by a writing 1. A write of 0 has no effect.
0
28
cfgActive
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Description
Reserved. Read only, returns 0 when read.
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9 Applications and Implementation
NOTE
Information in the following applications sections is not part of the TI component
specification, and TI does not warrant its accuracy or completeness. TI’s customers are
responsible for determining suitability of components for their purposes. Customers should
validate and test their design implementation to confirm system functionality.
9.1 Application Information
The TUSB8041 is a four-port USB 3.0 compliant hub. It provides simultaneous SuperSpeed USB and highspeed/full-speed connections on the upstream port and provides SuperSpeed USB, high-speed, full-speed, or
low speed connections on the downstream port. The TUSB8041 can be used in any application that needs
additional USB compliant ports. For example, a specific notebook may only have two downstream USB ports. By
using the TUSB8041, the notebook can increase the downstream port count to five.
9.2 Typical Application
9.2.1 Discrete USB Hub Product
A common application for the TUSB8041 is as a self powered standalone USB hub product. The product is
powered by an external 5V DC Power adapter. In this application, using a USB cable TUSB8041’s upstream port
is plugged into a USB Host controller. The downstream ports of the TUSB8041 are exposed to users for
connecting USB hard drives, cameras, flash drives, and so forth.
USB
Type B
Connector
DC
PWR
US Port
TUSB8041
USB
PWR
SWITCH
USB
PWR
SWITCH
DS Port 1
USB Type A
Connector
DS Port 2
DS Port 3
DS Port 4
USB Type A
Connector
USB Type A
Connector
USB Type A
Connector
Figure 4. Discrete USB Hub Product
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Typical Application (continued)
9.2.1.1 Design Requirements
Table 48. Design Parameters
DESIGN PARAMETER
EXAMPLE VALUE
VDD Supply
1.1V
VDD33 Supply
3.3V
Upstream Port USB Support (SS, HS, FS)
SS, HS, FS
Downstream Port 1 USB Support (SS, HS, FS, LS)
SS, HS, FS, LS
Downstream Port 2 USB Support (SS, HS, FS, LS)
SS, HS, FS, LS
Downstream Port 3 USB Support (SS, HS, FS, LS)
SS, HS, FS, LS
Downstream Port 4 USB Support (SS, HS, FS, LS)
SS, HS, FS, LS
Number of Removable Downstream Ports
4
Number of Non-Removable Downstream Ports
0
Full Power Management of Downstream Ports
Yes. (FULLPWRMGMTZ = 0)
Individual Control of Downstream Port Power Switch
Yes. (GANGED = 0)
Power Switch Enable Polarity
Active High. (PWRCTL_POL = 1)
Battery Charge Support for Downstream Port 1
Yes
Battery Charge Support for Downstream Port 2
Yes
Battery Charge Support for Downstream Port 3
Yes
Battery Charge Support for Downstream Port 4
Yes
I2C EEPROM Support
No.
24MHz Clock Source
Crystal
9.2.1.2 Detailed Design Procedure
9.2.1.2.1 Upstream Port Implementation
The upstream of the TUSB8041 is connected to a USB3 Type B connector. This particular example has
GANGED pin and FULLPWRMGMTZ pin pulled low which results in individual power support each downstream
port. The VBUS signal from the USB3 Type B connector is feed through a voltage divider. The purpose of the
voltage divider is to make sure the level meets USB_VBUS input requirements
R1
90.9K
0402
1%
C1
10uF
R2
10K 1%
0402
1%
U1A
J1
48
VBUS
DM
DP
GND
SSTXN
SSTXP
GND
SSRXN
SSRXP
SHIELD0
SHIELD1
1
2
3
4
5
6
7
8
9
10
11
VBUS
USB_DM_UP
USB_DP_UP
CAP_UP_TXM
CAP_UP_TXP
C2
0.1uF 0201
USB_SSTXM_UP
C3
0.1uF 0201
USB_SSTXP_UP
USB_SSRXM_UP
USB_SSRXP_UP
54
53
56
55
59
58
USB_VBUS
GANGED/SMBA2/HS_UP
USB_DM_UP
USB_DP_UP
FULLPWRMGMTZ/SMBA1/SS_UP
USB_SSTXM_UP
USB_SSTXP_UP
USB_SSRXM_UP
USB_SSRXP_UP
42
40
R3
4.7K
0402
5%
R4
4.7K
0402
5%
TUSB8041
USB3_TYPEB_CONNECTOR
C4
0.1uF
C5
0.001uF
R5
1M
0402
5%
Figure 5. Upstream Port Implementation
30
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9.2.1.2.2 Downstream Port 1 Implementation
The downstream port 1 of the TUSB8041 is connected to a USB3 Type A connector. With BATEN1 pin pulled
up, Battery Charge support is enabled for Port 1. If Battery Charge support is not needed, then pull-up resistor on
BATEN1 should be uninstalled.
BOARD_3P3V
FB1
R6
4.7K
0402
5%
POPULATE
FOR BC SUPPORT
DN1_VBUS
DN1_VBUS
VBUS_DS1
220 @ 100MHZ
C6
0.1uF
J2
U1B
USB_DM_DN1
USB_DP_DN1
USB_SSRXM_DN1
USB_SSRXP_DN1
USB_SSTXM_DN1
USB_SSTXP_DN1
PWRCTL1/BATEN1
OVERCUR1
2
1
USB_DM_DN1
USB_DP_DN1
7
6
USB_SSRXM_DN1
USB_SSRXP_DN1
4
3
USB_SSTXM_DN1
C7
0.1uF 0201
C8
CAP_DN_TXM1
CAP_DN_TXP1
USB_SSTXP_DN1
36
0.1uF 0201
PWRCTRL1_BATEN1
46
1
2
3
4
5
6
7
8
9
10
11
VBUS
DM
DP
GND
SSRXN
SSRXP
GND
SSTXN
SSTXP
SHIELD0
SHIELD1
USB3_TYPEA_CONNECTOR
OVERCUR1Z
R7
1M
0402
5%
TUSB8041
C9
0.001uF
C10
0.1uF
Figure 6. Downstream Port 1 Implementation
9.2.1.2.3 Downstream Port 2 Implementation
The downstream port 2 of the TUSB8041 is connected to a USB3 Type A connector. With BATEN2 pin pulled
up, Battery Charge support is enabled for Port 2. If Battery Charge support is not needed, then pull-up resistor on
BATEN2 should be uninstalled.
BOARD_3P3V
FB2
POPULATE
FOR BC SUPPORT
R8
4.7K
0402
5%
DN2_VBUS
DN2_VBUS
VBUS_DS2
220 @ 100MHZ
C11
0.1uF
J3
U1C
USB_DM_DN2
USB_DP_DN2
USB_SSRXM_DN2
USB_SSRXP_DN2
USB_SSTXM_DN2
USB_SSTXP_DN2
PWRCTL2/BATEN2
OVERCUR2
10
9
USB_DM_DN2
USB_DP_DN2
15
14
USB_SSRXM_DN2
USB_SSRXP_DN2
12
11
USB_SSTXM_DN2
USB_SSTXP_DN2
35
C13
C12
0.1uF 0201
0.1uF 0201
CAP_DN2_TXM
CAP_DN2_TXP
PWRCTRL2_BATEN2
47
OVERCUR2Z
TUSB8041
R9
1M
0402
5%
C15
0.001uF
1
2
3
4
5
6
7
8
9
10
11
VBUS
DM
DP
GND
SSRXN
SSRXP
GND
SSTXN
SSTXP
SHIELD0
SHIELD1
USB3_TYPEA_CONNECTOR
C14
0.1uF
Figure 7. Downstream Port 2 Implementation
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9.2.1.2.4 Downstream Port 3 Implementation
The downstream port3 of the TUSB8041 is connected to a USB3 Type A connector. With BATEN3 pin pulled up,
Battery Charge support is enabled for Port 3. If Battery Charge support is not needed, then pull-up resistor on
BATEN3 should be uninstalled.
BOARD_3P3V
FB3
POPULATE
FOR BC SUPPORT
R10
4.7K
0402
5%
VBUS_DS3
DN3_VBUS
220 @ 100MHZ
C16
0.1uF
J4
U1D
USB_DM_DN3
USB_DP_DN3
USB_SSRXM_DN3
USB_SSRXP_DN3
USB_SSTXM_DN3
USB_SSTXP_DN3
PWRCTL3/BATEN3
OVERCUR3
18
17
USB_DM_DN3
USB_DP_DN3
23
22
USB_SSRXM_DN3
USB_SSRXP_DN3
20
19
USB_SSTXM_DN3
USB_SSTXP_DN3
C18
33
C17
0.1uF 0201
0.1uF 0201
CAP_DN3_TXM
CAP_DN3_TXP
PWRCTRL3_BATEN3
44
R11
1M
0402
5%
OVERCUR3Z
TUSB8041
C19
0.001uF
1
2
3
4
5
6
7
8
9
10
11
VBUS
DM
DP
GND
SSRXN
SSRXP
GND
SSTXN
SSTXP
SHIELD0
SHIELD1
USB3_TYPEA_CONNECTOR
C20
0.1uF
Figure 8. Downstream Port 3 Implementation
9.2.1.2.5 Downstream Port 4 Implementation
The downstream port 4 of the TUSB8041 is connected to a USB3 Type A connector. With BATEN4 pin pulled
up, Battery Charge support is enabled for Port 4. If Battery Charge support is not needed, then pull-up resistor on
BATEN4 should be uninstalled.
BOARD_3P3V
FB4
POPULATE
FOR BC SUPPORT
R12
4.7K
0402
5%
VBUS_DS4
DN4_VBUS
220 @ 100MHZ
C21
0.1uF
J5
U1E
USB_DM_DN4
USB_DP_DN4
USB_SSRXM_DN4
USB_SSRXP_DN4
USB_SSTXM_DN4
USB_SSTXP_DN4
PWRCTL4/BATEN4
OVERCUR4
25
24
USB_DM_DN4
USB_DP_DN4
30
29
USB_SSRXM_DN4
USB_SSRXP_DN4
27
26
USB_SSTXM_DN4
USB_SSTXP_DN4
32
C23
C22
0.1uF 0201
0.1uF 0201
CAP_DN4_TXM
CAP_DN4_TXP
PWRCTRL4_BATEN4
43
OVERCUR4Z
TUSB8041
R13
1M
0402
5%
C25
0.001uF
1
2
3
4
5
6
7
8
9
10
11
VBUS
DM
DP
GND
SSRXN
SSRXP
GND
SSTXN
SSTXP
SHIELD0
SHIELD1
USB3_TYPEA_CONNECTOR
C24
0.1uF
Figure 9. Downstream Port 4 Implementation
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9.2.1.2.6 VBUS Power Switch Implementation
This particular example uses the Texas Instruments TPS2561 Dual Channel Precision Adjustable CurrentLimited power switch. For details on this power switch or other power switches available from Texas Instruments,
refer to the Texas Instruments website.
BOARD_3P3V
BOARD_3P3V
BOARD_5V
R19
10K
0402
5%
C42
0.1uF
U2
2
3
PWRCTRL1_BATEN1
PWRCTRL2_BATEN2
R20
10K
0402
5%
PWRCTRL1_BATEN1
PWRCTRL2_BATEN2
4
5
1
11
IN
IN
OUT1
FAULT1Z
EN1
OUT2
EN2
FAULT2Z
GND
PAD
ILIM
9
DN1_VBUS
DN1_VBUS
10
8
OVERCUR1Z
DN2_VBUS
DN2_VBUS
6
7
OVERCUR2Z
ILIM1
C43
C45
0.1uF
TPS2561
+
R21
25.5K
0402
5%
0.1uF
C44
150uF
+
C46
150uF
Limiting DS Port VBUS current to 2.2A per port.
BOARD_3P3V
BOARD_3P3V
BOARD_5V
R22
10K
0402
5%
C47
0.1uF
U3
2
3
PWRCTRL3_BATEN3
PWRCTRL4_BATEN4
R23
10K
0402
5%
4
5
1
11
IN
IN
OUT1
FAULT1Z
EN1
OUT2
EN2
FAULT2Z
GND
PAD
TPS2561
ILIM
9
DN3_VBUS
DN3_VBUS
10
8
OVERCUR3Z
DN4_VBUS
DN4_VBUS
6
7
OVERCUR4Z
ILIM2
C48
0.1uF
R24
25.5K
0402
5%
C50
+
C49
150uF
0.1uF
+
C51
150uF
Limiting DS Port VBUS current to 2.2A per port.
Figure 10. VBUS Power Switch Implementation
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9.2.1.2.7 Clock, Reset, and Misc
The PWRCTL_POL is left unconnected which results in active high power enable (PWRCTL1, PWRCTL2,
PWRCTL3, and PWRCTL4) for a USB VBUS power switch. The 1 µF capacitor on the GRSTN pin can only be
used if the VDD11 supply is stable before the VDD33 supply. The depending on the supply ramp of the two
supplies the capacitor may have to be adjusted.
U1F
C39
50
GRSTN
1uF
38
37
SCL/SMBCLK
SDA/SMBDAT
39
SMBUSZ/SS_SUSPEND
62
R14
XI
45
AUTOENZ/HS_SUSPEND
41
PWRCTL_POL
1M
61
XO
49
TEST
Y1
64
USB_R1
R15
9.53K
0402
1%
TUSB8041
24MHz
C40
C41
18pF
18pF
R16
4.7K
R18
4.7K
0402
5%
Figure 11. Clock, Reset, and Misc
9.2.1.2.8 TUSB8041 Power Implementation
BOARD_1P1V
VDD11
C26
C27
C28
C29
C30
C31
C32
0.1uF
0.1uF
0.1uF
0.1uF
0.1uF
0.1uF
0.1uF
C33
10uF
220 @ 100MHZ
NC
VDD33
VDD33
VDD33
VDD33
16
34
52
63
VDD33
BOARD_3P3V
FB6
65
60
TPAD
VDD
VDD
VDD
VDD
VDD
VDD
VDD
VDD
U1G
5
13
21
28
31
51
57
8
FB5
C34
C35
C36
C37
0.1uF
0.1uF
0.1uF
0.1uF
C38
10uF
220 @ 100MHZ
TUSB8041
Figure 12. TUSB8041 Power Implementation
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9.2.1.3 Application Curves
Figure 13. Upstream Port
Figure 14. Downstream Port 1
Figure 15. Downstream Port 2
Figure 16. Downstream Port 3
Figure 17. Downstream Port 4
Figure 18. High-Speed Upstream Port
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Figure 19. High-Speed Downstream Port 1
Figure 20. High-Speed Downstream Port 2
Figure 21. High-Speed Downstream Port 3
Figure 22. High-Speed Downstream Port 4
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10 Power Supply Recommendations
10.1 TUSB8041 Power Supply
VDD should be implemented as a single power plane, as should VDD33.
• The VDD pins of the TUSB8041 supply 1.1 V (nominal) power to the core of the TUSB8041. This power rail
can be isolated from all other power rails by a ferrite bead to reduce noise.
• The DC resistance of the ferrite bead on the core power rail can affect the voltage provided to the device due
to the high current draw on the power rail. The output of the core voltage regulator may need to be adjusted
to account for this or a ferrite bead with low DC resistance (less than 0.05 Ω) can be selected.
• The VDD33 pins of the TUSB8041 supply 3.3 V power rail to the I/O of the TUSB8041. This power rail can be
isolated from all other power rails by a ferrite bead to reduce noise.
• All power rails require a 10 µF capacitor or 1 µF capacitors for stability and noise immunity. These bulk
capacitors can be placed anywhere on the power rail. The smaller decoupling capacitors should be placed as
close to the TUSB8041 power pins as possible with an optimal grouping of two of differing values per pin.
10.2 Downstream Port Power
•
•
•
The downstream port power, VBUS, must be supplied by a source capable of supplying 5V and up to 900 mA
per port. Downstream port power switches can be controlled by the TUSB8041 signals. It is also possible to
leave the downstream port power always enabled.
A large bulk low-ESR capacitor of 22 µF or larger is required on each downstream port’s VBUS to limit in-rush
current.
The ferrite beads on the VBUS pins of the downstream USB port connections are recommended for both
ESD and EMI reasons. A 0.1µF capacitor on the USB connector side of the ferrite provides a low impedance
path to ground for fast rise time ESD current that might have coupled onto the VBUS trace from the cable.
10.3 Ground
It is recommended that only one board ground plane be used in the design. This provides the best image plane
for signal traces running above the plane. The thermal pad of the TUSB8041 and any of the voltage regulators
should be connected to this plane with vias. An earth or chassis ground is implemented only near the USB port
connectors on a different plane for EMI and ESD purposes.
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11 Layout
11.1 Layout Guidelines
11.1.1 Placement
1. 9.53K ±1% resistor connected to pin USB_R1 should be placed as close as possible to the TUSB8041.
2. A 0.1 µF capacitor should be placed as close as possible on each VDD and VDD33 power pin.
3. The 100 nF capacitors on the SSTXP and SSTXM nets should be placed close to the USB connector (Type
A, Type B, and so forth).
4. The ESD and EMI protection devices (if used) should also be placed as possible to the USB connector.
5. If a crystal is used, it must be placed as close as possible to the TUSB8041’s XI and XO pins.
6. Place voltage regulators as far away as possible from the TUSB8041, the crystal, and the differential pairs.
7. In general, the large bulk capacitors associated with each power rail should be placed as close as possible to
the voltage regulators.
11.1.2 Package Specific
1. The TUSB8041 package has a 0.5-mm pin pitch.
2. The TUSB8041 package has a 6.0-mm x 6.0-mm thermal pad. This thermal pad must be connected to
ground through a system of vias.
3. All vias under device, except for those connected to thermal pad, should be solder masked to avoid any
potential issues with thermal pad layouts.
11.1.3 Differential Pairs
This section describes the layout recommendations for all the TUSB8041 differential pairs: USB_DP_XX,
USB_DM_XX, USB_SSTXP_XX, USB_SSTXM_XX, USB_SSRXP_XX, and USB_SSRXM_XX.
1. Must be designed with a differential impedance of 90 Ω ±10%.
2. In order to minimize cross talk, it is recommended to keep high speed signals away from each other. Each
pair should be separated by at least 5 times the signal trace width. Separating with ground as depicted in the
layout example will also help minimize cross talk.
3. Route all differential pairs on the same layer adjacent to a solid ground plane.
4. Do not route differential pairs over any plane split.
5. Adding test points will cause impedance discontinuity and will therefore negative impact signal performance.
If test points are used, they should be placed in series and symmetrically. They must not be placed in a
manner that causes stub on the differential pair.
6. Avoid 90 degree turns in trace. The use of bends in differential traces should be kept to a minimum. When
bends are used, the number of left and right bends should be as equal as possible and the angle of the bend
should be ≥ 135 degrees. This will minimize any length mismatch causes by the bends and therefore
minimize the impact bends have on EMI.
7. Minimize the trace lengths of the differential pair traces. The maximum recommended trace length for SS
differential pair signals and USB 2.0 differential pair signals is eight inches. Longer trace lengths require very
careful routing to assure proper signal integrity.
8. Match the etch lengths of the differential pair traces (i.e. DP and DM or SSRXP and SSRXM or SSTXP and
SSTXM). There should be less than 5 mils difference between a SS differential pair signal and its
complement. The USB 2.0 differential pairs should not exceed 50 mils relative trace length difference.
9. The etch lengths of the differential pair groups do not need to match (i.e. the length of the SSRX pair to that
of the SSTX pair), but all trace lengths should be minimized.
10. Minimize the use of vias in the differential pair paths as much as possible. If this is not practical, make sure
that the same via type and placement are used for both signals in a pair. Any vias used should be placed as
close as possible to the TUSB8041 device.
11. To ease routing, the polarity of the SS differential pairs can be swapped. This means that SSTXP can be
routed to SSTXM or SSRXM can be routed to SSRXP.
12. To ease routing of the USB2 DP and DM pair, the polarity of these pins can be swapped. If this is done, the
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Layout Guidelines (continued)
appropriate Px_usb2pol register, where x = 0, 1, 2, 3, or 4, must be set.
13. Do not place power fuses across the differential pair traces.
11.2 Layout Examples
11.2.1 Upstream Port
Figure 23. Example Routing of Upstream Port
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Layout Examples (continued)
11.2.2 Downstream Port
Figure 24. Example Routing of Downstream Port
The remaining three downstream ports routing can be similar to the example provided.
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12 Device and Documentation Support
12.1 Community Resources
The following links connect to TI community resources. Linked contents are provided "AS IS" by the respective
contributors. They do not constitute TI specifications and do not necessarily reflect TI's views; see TI's Terms of
Use.
TI E2E™ Online Community TI's Engineer-to-Engineer (E2E) Community. Created to foster collaboration
among engineers. At e2e.ti.com, you can ask questions, share knowledge, explore ideas and help
solve problems with fellow engineers.
Design Support TI's Design Support Quickly find helpful E2E forums along with design support tools and
contact information for technical support.
12.2 Trademarks
E2E is a trademark of Texas Instruments.
All other trademarks are the property of their respective owners.
12.3 Electrostatic Discharge Caution
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
12.4 Glossary
SLYZ022 — TI Glossary.
This glossary lists and explains terms, acronyms, and definitions.
13 Mechanical, Packaging, and Orderable Information
The following pages include mechanical packaging and orderable information. This information is the most
current data available for the designated devices. This data is subject to change without notice and revision of
this document. For browser-based versions of this data sheet, refer to the left-hand navigation.
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PACKAGE OUTLINE
RGC0064G
VQFN - 1 mm max height
SCALE 1.500
PLASTIC QUAD FLATPACK - NO LEAD
9.1
8.9
A
B
PIN 1 INDEX AREA
9.1
8.9
(0.1) TYP
LEADFRAME PROFILE
OPTION
SCALE 8.000
1 MAX
C
SEATING PLANE
0.05
0.00
0.08
2X 7.5
(0.2) TYP
6 0.05
17
60X 0.5
32
16
33
SEE DETAIL
2X
7.5
EXPOSED
THERMAL PAD
1
PIN 1 ID
(OPTIONAL)
48
64
49
0.5
64X
0.3
64X
0.30
0.18
0.1
0.05
C A
B
4222053/B 06/2015
NOTES:
1. All linear dimensions are in millimeters. Any dimensions in parenthesis are for reference only. Dimensioning and tolerancing
per ASME Y14.5M.
2. This drawing is subject to change without notice.
3. The package thermal pad must be soldered to the printed circuit board for thermal and mechanical performance.
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EXAMPLE BOARD LAYOUT
RGC0064G
VQFN - 1 mm max height
PLASTIC QUAD FLATPACK - NO LEAD
( 6)
SYMM
49
64
64X (0.6)
1
48
64X (0.24)
8X (1.01)
60X (0.5)
18X (1.16)
(8.8)
SYMM
(0.58)
TYP
( 0.2) TYP
VIA
(0.58) TYP
16
33
32
8X (1.01)
17
18X (1.16)
(R0.05)
ALL PAD CORNERS
(8.8)
LAND PATTERN EXAMPLE
SCALE:10X
0.07 MIN
ALL SIDES
0.07 MAX
ALL AROUND
SOLDER MASK
OPENING
METAL
SOLDER MASK
OPENING
METAL UNDER
SOLDER MASK
NON SOLDER MASK
DEFINED
(PREFERRED)
SOLDER MASK
DEFINED
SOLDER MASK DETAILS
4222053/B 06/2015
NOTES: (continued)
4. This package is designed to be soldered to a thermal pad on the board. For more information, see Texas Instruments literature
number SLUA271 (www.ti.com/lit/slua271).
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EXAMPLE STENCIL DESIGN
RGC0064G
VQFN - 1 mm max height
PLASTIC QUAD FLATPACK - NO LEAD
25X ( 0.96)
(1.16) TYP
49
64
(R0.05) TYP
64X (0.6)
1
48
64X (0.24)
60X (0.5)
(1.16)
TYP
SYMM
(8.8)
(R0.05) TYP
16
METAL
TYP
17
33
32
SYMM
(8.8)
SOLDER PASTE EXAMPLE
BASED ON 0.125 mm THICK STENCIL
EXPOSED PAD
64% PRINTED SOLDER COVERAGE BY AREA
SCALE:12X
4222053/B 06/2015
NOTES: (continued)
5. Laser cutting apertures with trapezoidal walls and rounded corners may offer better paste release. IPC-7525 may have alternate
design recommendations.
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PACKAGE OPTION ADDENDUM
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10-Dec-2020
PACKAGING INFORMATION
Orderable Device
Status
(1)
Package Type Package Pins Package
Drawing
Qty
Eco Plan
(2)
Lead finish/
Ball material
MSL Peak Temp
Op Temp (°C)
Device Marking
(3)
(4/5)
(6)
TUSB8041IRGCR
ACTIVE
VQFN
RGC
64
2000
RoHS & Green
NIPDAU
Level-3-260C-168 HR
-40 to 85
TUSB8041I
TUSB8041IRGCT
ACTIVE
VQFN
RGC
64
250
RoHS & Green
NIPDAU
Level-3-260C-168 HR
-40 to 85
TUSB8041I
TUSB8041RGCR
ACTIVE
VQFN
RGC
64
2500
RoHS & Green
NIPDAU
Level-3-260C-168 HR
0 to 70
TUSB8041
TUSB8041RGCT
ACTIVE
VQFN
RGC
64
250
RoHS & Green
NIPDAU
Level-3-260C-168 HR
0 to 70
TUSB8041
(1)
The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2)
RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance
do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may
reference these types of products as "Pb-Free".
RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption.
Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of
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