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USB1T20 — Universal Serial Bus Transceiver
Features
Description
Complies with Universal Serial Bus Specification
2.0 for FS/LS Applications
Utilizes Digital Inputs and Outputs to Transmit and
Receive USB Cable Data
Supports 12Mbit/s Full Speed (FS) and 1.5Mbit/s
Low Speed (LS) Serial Data Transmission
Supports Single-ended and Differential Data
Interface as Function of MODE
USB1T20 is a generic USB 2.0 compliant transceiver.
Using a single voltage supply, the USB1T20 provides an
ideal USB interface solution for any electronic device
able to supply 3.0 V to 3.6 V. It is designed to allow
5.0 V or 3.3 V programmable and standard logic to
interface with the physical layer of the Universal Serial
Bus (USB). It is capable of transmitting and receiving
serial data at both full speed (12Mbit/s) and low speed
(1.5Mbit/s) data rates.
Single 3.3 V Supply
ESD Performance: Human Body Model
- 9.5 kV on D-, D+ Pins Only
- 4.0 kV on All Other Pins
Packaged in industry-standard TSSOP package. The
USB1T20 is ideal for mobile electronics and other
space-constrained applications.
Ordering Information
Part Number
USB1T20MTCX
Operating
Temperature Range
Packing
Method
Package
14-Lead, Thin-Shrink Small-Outline Package (TSSOP)
JEDEC MO-153, 4.4mm Wide
-40° to +85°C
D-
/OE
SPEED
VMO/FSE0
D+
VPO
RCV
Tape and Reel
+
-
VP
VM
Figure 1. Logic Diagram
© 2004 Fairchild Semiconductor Corporation
USB1T20 • Rev. 1.0.3
www.fairchildsemi.com
USB1T20 — Universal Serial Bus Transceiver
May 2013
MODE
1
14
VCC
/OE
2
13
VMO/FSEO
RCV
3
12
VPO
VP
4
11
D+
VM
5
10
D-
SUSPND
6
9
SPEED
GND
7
8
NC
Figure 2. Pin Configuration (Top View)
Pin Definitions
Pin #
Name
I/O
Description
1
MODE
I
Mode. When left unconnected, a weak pull-up transistor pulls mode pin to VCC and, in
this GND, the VMO/FSEO pin takes the function of FSEO (force SEO).
2
/OE
I
Output Enable. Active LOW; enables the transceiver to transmit data on the bus.
When not active, the transceiver is in receive mode.
3
RCV
O
Receive Data. CMOS-Level output for USB differential input.
USB1T20 — Universal Serial Bus Transceiver
Pin Configuration
Gated version of D- and D+. Outputs are logic “0” and logic “1.” Used to detect single
ended zero (/SEO), error conditions, and interconnected speed. (Input to SIE).
4, 5
VP,VM
O
6
SUSPND
I
7
GND
8
NC
9
SPEED
I
10, 11
D-, D+
AI/O
VP
VM
RESULT
0
0
/SEO
0
1
Low Speed
1
0
Full Speed
0
1
Error
Suspend. Enables a low-power state while the USB bus is inactive. While the suspend
pin is active, it drives the RCV pin to a logic “0” state. Both D+ and D- are
3-state.
Ground reference.
No connect.
Edge Rate Control. Logic “1” operates at edge rates for full speed. Logic “0” operates
edge rates for low speed.
Data+, Data-. Differential data bus conforming to the Universal Serial Bus standard.
Inputs to differential driver. (Outputs from SIE.)
Mode
0
12, 13
VPO,VMO/FSEO
I
1
14
VCC
© 2004 Fairchild Semiconductor Corporation
USB1T20 • Rev. 1.0.3
VPO
VMO/FSEO
RESULT
0
0
Logic “0”
0
1
/SEO
1
0
Logic “1”
1
1
/SEO
0
0
/SEO
0
1
Logic “0”
1
0
Logic “1”
1
1
Illegal Code
3.0 to 3.6 power supply.
www.fairchildsemi.com
2
Input
I/O
VMO/FSEO /OE SUSPND
Outputs
Mode
VPO
D+
D-
RCV
VP
VM
Result
0
0
0
0
0
0
1
0
0
1
Logic “0”
0
0
1
0
0
0
0
Undefined
State
0
0
/SEO
0
1
0
0
0
1
0
1
1
0
Logic “1”
0
1
1
0
0
0
0
Undefined
State
0
0
/SEO
1
0
0
0
0
0
0
Undefined
State
0
0
/SEO
1
0
1
0
0
0
1
0
0
1
Logic “0”
1
1
0
0
0
1
0
1
1
0
Logic “1”
1
1
1
0
0
1
1
Undefined
State
Undefined
State
Undefined
State
Illegal
Code
Don’t
Care
Don’t
Care
Don’t
Care
1
0
3State
3State
Undefined
State
Undefined
State
Undefined
State
D+/DHi-Z
Don’t
Care
Don’t
Care
Don’t
Care
1
1
3State
3State
Undefined
State
Undefined
State
Undefined
State
D+/DHi-Z
© 2004 Fairchild Semiconductor Corporation
USB1T20 • Rev. 1.0.3
USB1T20 — Universal Serial Bus Transceiver
Functional Truth Table
www.fairchildsemi.com
3
Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be
operable above the recommended operating conditions and stressing the parts to these levels is not recommended.
In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability.
The absolute maximum ratings are stress ratings only.
Symbol
VCC
IIK
Parameter
DC Supply Voltage
Min.
Max.
Unit
-0.5
7.0
V
-50
mA
DC Input Diode Current, VIN < 0 V
(1)
VIN
Input Voltage
-0.5
5.5
V
VI/O
Input / Output Voltage
-0.5
VCC + 0.5
V
IOK
Output Diode Current, VO > VCC or VO < 0 V
±50
mA
VCC + 0.5
V
VO
IO
ICC / IGND
TSTG
(1)
Output Voltage
Output Source or Sink Current
(VO = 0 to VCC)
-0.5
VP, VM, RCV Pins
±15
D+/D- Pins
±50
VCC / GND Current
Storage Temperature Range
-60
mA
±100
mA
+150
°C
Note:
1. The input and output negative voltage ratings may be exceeded if the input and output diode current ratings are
observed.
USB1T20 — Universal Serial Bus Transceiver
Absolute Maximum Ratings
Recommended Operating Conditions
The Recommended Operating Conditions table defines the conditions for actual device operation. Recommended
operating conditions are specified to ensure optimal performance to the datasheet specifications. Fairchild does not
recommend exceeding them or designing to Absolute Maximum Ratings.
Symbol
Parameter
Min.
Max.
Unit
VCC
Supply Voltage
3.0
3.6
V
VIN
Input Voltage
0
5.5
V
Input Range for AI/0
0
VCC
V
VAI/O
VO
Output Voltage
TA
Operating Ambient Temperature, Free Air
© 2004 Fairchild Semiconductor Corporation
USB1T20 • Rev. 1.0.3
0
VCC
V
-40
+85
°C
www.fairchildsemi.com
4
Over the recommended range of supply voltage and operating free air temperature unless otherwise noted. VCC =
3.0 V to 3.6 V.
Symbol
Parameter
Conditions
TA = -40 to +85°C
Min.
Typ.
Max.
Units
Input Levels
VIL
Low-Level Input Voltage
VIH
High-Level Input Voltage
0.8
V
2
V
Output Levels
VOL
Low-Level Output Voltage
VOH
High-Level Output Voltage
IOL = 4 mA
0.4
IOL = 20 µA
0.1
IOH = 4 mA
2.4
IOH = 20 µA
VCC-0.1
V
V
Leakage Current
Input Leakage Current
VCC = 3.0 to 3.6 V
±5
µA
ICCFS
IIN
Supply Current, Full Speed
VCC = 3.0 to 3.6 V
5
mA
ICCLS
Supply Current, Low Speed
VCC = 3.0 to 3.6 V
5
mA
ICCQ
Quiescent Supply Current
VCC = 3.0 to 3.6 V,
VIN = VCC or GND
5
mA
ICCS
Supply Current in Suspend
VCC = 3.0 to 3.6 V,
Mode = VCC
10
µA
USB1T20 — Universal Serial Bus Transceiver
DC Electrical Characteristics Digital Pins
DC Electrical Characteristics D+/D- Pins
Over the recommended range of supply voltage and operating free air temperature unless otherwise noted. VCC =
3.0V to 3.6V.
Symbol
Parameter
Conditions
TA=-40 to +85°C
Min.
Typ.
Max.
Units
Input Levels
VDI
Differential Input Sensitivity
(D+) – (D-)
0.2
VCM
Differential Common-Mode Range
Includes VDI Range
0.8
2.5
V
VSE
Single-Ended Receiver Threshold
0.8
2.0
V
0.3
V
2.8
3.6
V
1.3
2.0
V
V
Output Levels
VOL
Static Output Low-Voltage
RL of 1.5 kto 3.6 V
VOH
Static Output High-Voltage
RL of 1.5 kto GND
VCR
Differential Crossover
Leakage Current
IOZ
High-Z State Data Line Leakage
Current
0 V