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SN74ALVC164245
SCAS416Q – MARCH 1994 – REVISED SEPTEMBER 2016
SN74ALVC164245 16-Bit 2.5-V to 3.3-V or 3.3-V to 5-V Level-Shifting Transceiver With 3State Outputs
1 Features
3 Description
•
This 16-bit (dual-octal) noninverting bus transceiver
contains two separate supply rails. B port has VCCB,
which is set to operate at 3.3 V and 5 V. A port has
VCCA, which is set to operate at 2.5 V and 3.3 V. This
allows for translation from a 2.5-V to a 3.3-V
environment, and vice versa, or from a 3.3-V to a 5-V
environment, and vice versa.
1
•
•
•
•
Member of the Texas Instruments Widebus™
Family
Maximum tpd of 5.8 ns at 3.3 V
±24-mA Output Drive at 3.3 V
Control Inputs VIH/VIL Levels Are Referenced to
VCCA Voltage
Latch-Up Performance Exceeds 250 mA Per
JESD 17
The SN74ALVC164245 is designed for asynchronous
communication between data buses. The control
circuitry (1DIR, 2DIR, 1OE, and 2OE) is powered by
VCCA.
2 Applications
•
•
•
•
•
To ensure the high-impedance state during power up
or power down, the output-enable (OE) input should
be tied to VCC through a pullup resistor; the minimum
value of the resistor is determined by the currentsinking capability of the driver.
Electronic Points of Sale
Printers and Other Peripherals
Motor Drives
Wireless and Telecom Infrastructures
Wearable Health and Fitness Devices
The logic levels of the direction-control (DIR) input
and the output-enable (OE) input activate either the
B-port outputs or the A-port outputs or place both
output ports into the high-impedance mode. The
device transmits data from the A bus to the B bus
when the B-port outputs are activated, and from the B
bus to the A bus when the A-port outputs are
activated. The input circuitry on both A and B ports
always is active and must have a logic HIGH or LOW
level applied to prevent excess ICC and ICCZ.
Device Information(1)
PART NUMBER
SN74ALVC164245
PACKAGE
BODY SIZE (NOM)
TSSOP (48)
12.50 mm × 6.10 mm
SSOP (48)
15.88 mm × 7.49 mm
BGA MICROSTAR
JUNIOR (56)
7.00 mm × 4.50 mm
BGA MICROSTAR
JUNIOR (54)
8.00 mm × 5.50 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Logic Diagram (Positive Logic)
1DIR
1
2DIR
48
1A1
25
1OE
47
2A1
2
To Seven Other Channels
24
2OE
36
13
1B1
2B1
To Seven Other Channels
Copyright © 2016, Texas Instruments Incorporated
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.
SN74ALVC164245
SCAS416Q – MARCH 1994 – REVISED SEPTEMBER 2016
www.ti.com
Table of Contents
1
2
3
4
5
6
Features ..................................................................
Applications ...........................................................
Description .............................................................
Revision History.....................................................
Pin Configuration and Functions .........................
Specifications.........................................................
1
1
1
2
3
7
6.1 Absolute Maximum Ratings ..................................... 7
6.2 ESD Ratings.............................................................. 7
6.3 Recommended Operating Conditions: VCCB at 3.3
V................................................................................. 7
6.4 Recommended Operating Conditions: VCCA at 2.5 V
................................................................................... 8
6.5 Thermal Information .................................................. 8
6.6 Electrical Characteristics: VCCA = 2.7 V to 3.6 V ...... 9
6.7 Electrical Characteristics: VCCA = 2.3 V to 2.7 V .... 10
6.8 Switching Characteristics ........................................ 10
6.9 Operating Characteristics........................................ 10
6.10 Typical Characteristics .......................................... 11
7
Parameter Measurement Information ................ 12
7.1
7.2
7.3
7.4
VCCA = 2.5 V ± 0.2 V to VCCB = 3.3 V ± 0.3 V ........ 12
VCCB = 3.3 V ± 0.3 V to VCCA = 2.5 V ± 0.2 V ........ 13
VCCA = 3.3 V ± 0.3 V to VCCB = 5 V ± 0.5 V ........... 14
VCCB = 5 V ± 0.5 V to VCCA = 2.7 V and 3.3 V ± 0.3
V............................................................................... 15
8
Detailed Description ............................................ 16
8.1
8.2
8.3
8.4
9
Overview .................................................................
Functional Block Diagram .......................................
Feature Description.................................................
Device Functional Modes........................................
16
16
16
16
Application and Implementation ........................ 17
9.1 Application Information............................................ 17
9.2 Typical Application ................................................. 17
10 Power Supply Recommendations ..................... 19
11 Layout................................................................... 19
11.1 Layout Guidelines ................................................. 19
11.2 Layout Example .................................................... 19
12 Device and Documentation Support ................. 20
12.1
12.2
12.3
12.4
12.5
12.6
Documentation Support ........................................
Receiving Notification of Documentation Updates
Community Resource............................................
Trademarks ...........................................................
Electrostatic Discharge Caution ............................
Glossary ................................................................
20
20
20
20
20
20
13 Mechanical, Packaging, and Orderable
Information ........................................................... 20
4 Revision History
Changes from Revision P (November 2005) to Revision Q
Page
•
Added ESD Ratings table, Feature Description section, Device Functional Modes, Application and Implementation
section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and
Mechanical, Packaging, and Orderable Information section .................................................................................................. 1
•
Deleted Ordering Information table; see POA at the end of the data sheet........................................................................... 1
•
Changed values in the Thermal Information table to align with JEDEC standards................................................................ 8
2
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SCAS416Q – MARCH 1994 – REVISED SEPTEMBER 2016
5 Pin Configuration and Functions
DGG and DL Packages
48-Pin TSSOP and BGA MICROSTAR JUINIOR
Top View
1DIR
1B1
1B2
GND
1B3
1B4
(3.3 V, 5 V) VCCB
1B5
1B6
GND
1B7
1B8
2B1
2B2
GND
2B3
2B4
(3.3 V, 5 V) VCCB
2B5
2B6
GND
2B7
2B8
2DIR
1
48
2
47
3
46
4
45
5
44
6
43
7
42
8
41
9
40
10
39
11
38
12
37
13
36
14
35
15
34
16
33
17
32
18
31
19
30
20
29
21
28
22
27
23
26
24
25
1OE
1A1
1A2
GND
1A3
1A4
VCCA (2.5 V, 3.3 V)
1A5
1A6
GND
1A7
1A8
2A1
2A2
GND
2A3
2A4
VCCA (2.5 V, 3.3 V)
2A5
2A6
GND
2A7
2A8
2OE
Pin Functions
PIN
NO.
NAME
I/O
DESCRIPTION
1
1DIR
—
Direction Pin 1
2
1B1
I/O
1B1 input or output
3
1B2
I/O
1B2 input or output
4
GND
—
Ground pin
5
1B3
I/O
1B3 input or output
6
1B4
I/O
1B4 input or output
7
VCCB
(3.3 V, 5 V)
—
Power pin
8
1B5
I/O
1B5 input or output
9
1B6
I/O
1B6 input or output
10
GND
—
Ground pin
11
1B7
I/O
1B7 input or output
12
1B8
I/O
1B8 input or output
13
2B1
I/O
2B1 input or output
14
2B2
I/O
2B2 input or output
15
GND
—
Ground pin
16
2B3
I/O
2B3 input or output
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Pin Functions (continued)
PIN
NO.
NAME
I/O
DESCRIPTION
17
2B4
I/O
2B4 input or output
18
VCCB
(3.3 V, 5 V)
—
Power pin
19
2B5
I/O
2B5 input or output
20
2B6
I/O
2B6 input or output
21
GND
—
Ground pin
22
2B7
I/O
2B7 input or output
23
2B8
I/O
2B8 input or output
24
2DIR
—
Direction pin 2
25
2OE
I
26
2A8
I/O
2A8 input or output
27
2A7
I/O
2A7 input or output
28
GND
—
Ground pin
29
2A6
I/O
2A6 input or output
30
2A5
I/O
2A5 input or output
31
VCCA
(2.5 V, 3.3 V)
—
Power pin
32
2A4
I/O
2A4 input or output
33
2A3
I/O
2A3 input or output
34
GND
—
Ground pin
35
2A2
I/O
2A2 input or output
36
2A1
I/O
2A1 input or output
37
1A8
I/O
1A8 input or output
38
1A7
I/O
1A7 input or output
39
GND
—
Ground pin
40
1A6
I/O
1A6 input or output
41
1A5
I/O
1A5 input or output
42
VCCA
(2.5 V, 3.3 V)
—
Power pin
43
1A4
I/O
1A4 input or output
44
1A3
I/O
1A3 input or output
45
GND
—
Ground pin
46
1A2
I/O
1A2 input or output
47
1A1
I/O
1A1 input or output
48
1OE
I
4
Output Enable 2
Output Enable 1
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SCAS416Q – MARCH 1994 – REVISED SEPTEMBER 2016
1 2 3 4 5 6
A
B
C
D
E
F
G
H
J
K
Table 1. Pin Assignments (1)
(56-Ball GQL or ZQL Package)
(1)
1
2
3
4
5
6
A
1DIR
NC
NC
NC
NC
1OE
B
1B2
1B1
GND
GND
1A1
1A2
C
1B4
1B3
VCCB
VCCA
1A3
1A4
D
1B6
1B5
GND
GND
1A5
1A6
E
1B8
1B7
—
—
1A7
1A8
F
2B1
2B2
—
—
2A2
2A1
G
2B3
2B4
GND
GND
2A4
2A3
H
2B5
2B6
VCCB
VCCA
2A6
2A5
J
2B7
2B8
GND
GND
2A8
2A7
K
2DIR
NC
NC
NC
NC
2OE
NC – No internal connection
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1
2
3
4
5
6
A
B
C
D
E
F
G
H
J
Table 2. Pin Assignments (1)
(54-Ball GRD or ZRD Package)
(1)
6
1
2
3
4
5
6
A
1B1
NC
1DIR
1OE
NC
1A1
B
1B3
1B2
NC
NC
1A2
1A3
C
1B5
1B4
VCCB
VCCA
1A4
1A5
D
1B7
1B6
GND
GND
1A6
1A7
E
2B1
1B8
GND
GND
1A8
2A1
F
2B3
2B2
GND
GND
2A2
2A3
G
2B5
2B4
VCCB
VCCA
2A4
2A5
H
2B7
2B6
NC
NC
2A6
2A7
J
2B8
NC
2DIR
2OE
NC
2A8
NC – No internal connection
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SCAS416Q – MARCH 1994 – REVISED SEPTEMBER 2016
6 Specifications
6.1 Absolute Maximum Ratings
over operating free-air temperature range for VCCB at 5 V and VCCA at 3.3 V (unless otherwise noted) (1)
VCC
Supply voltage
VI
Input voltage
MIN
MAX
VCCA
–0.5
4.6
VCCB
–0.5
6
Except I/O ports (2)
–0.5
6
I/O port A (3)
–0.5
VCCA + 0.5
(2)
–0.5
VCCB + 0.5
I/O port B
UNIT
V
V
IIK
Input clamp current
VI < 0
–50
mA
IOK
Output clamp current
VO < 0
–50
mA
IO
Continuous output current
±50
mA
Continuous current through each VCC or GND
±100
mA
150
°C
Tstg
(1)
(2)
(3)
Storage temperature
–65
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.
This value is limited to 6 V maximum.
This value is limited to 4.6 V maximum.
6.2 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)
V
±1000
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.
6.3 Recommended Operating Conditions: VCCB at 3.3 V
for VCCB at 3.3 V and 5 V (1)
MIN
MAX
5.5
VCCB
Supply voltage
3
VIH
High-level input voltage
2
UNIT
V
V
VCCB = 3 V to 3.6 V
0.7
VCCB = 4.5 V to 5.5 V
0.8
VIL
Low-level input voltage
VIB
Input voltage
0
VCCB
VOB
Output voltage
0
VCCB
V
IOH
High-level output current
–24
mA
IOL
Low-level output current
24
mA
Δt/Δv
Input transition rise or fall rate
10
ns/V
TA
Operating free-air temperature
85
°C
(1)
–40
V
V
All unused inputs of the device must be held at VCC or GND to ensure proper device operation. see the TI application report,
Implications of Slow or Floating CMOS Inputs (SCBA004).
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6.4 Recommended Operating Conditions: VCCA at 2.5 V
for VCCA at 2.5 V and 3.3 V (1)
VCCA
Supply voltage
VCCA = 2.3 V to 2.7 V
MIN
MAX
2.3
3.6
1.7
UNIT
V
VIH
High-level input voltage
VIL
Low-level input voltage
VIA
Input voltage
0
VCCA
V
VOA
Output voltage
0
VCCA
V
IOH
High-level output current
IOL
Low-level output current
Δt/Δv
Input transition rise or fall rate
TA
Operating free-air temperature
(1)
VCCA = 3 V to 3.6 V
V
2
VCCA = 2.3 V to 2.7 V
0.7
VCCA = 3 V to 3.6 V
0.8
VCCA = 2.3 V
–18
VCCA = 3 V
–24
VCCA = 2.3 V
18
VCCA = 3 V
24
–40
V
mA
mA
10
ns/V
85
°C
All unused inputs of the device must be held at VCC or GND to ensure proper device operation. See the TI application report,
Implications of Slow or Floating CMOS Inputs, (SCBA004).
6.5 Thermal Information
SN74ALVC164245
THERMAL METRIC (1)
DGG
(TSSOP)
DL
(SSOP)
ZQL
(BGA MICROSTAR
JUNIOR)
ZRD
(BGA MICROSTAR
JUNIOR)
48 PINS
48 PINS
56 PINS
54 PINS
UNIT
RθJA
Junction-to-ambient thermal resistance
60.7
63.6
54.5
50.7
°C/W
RθJC(top)
Junction-to-case (top) thermal
resistance
14.3
30.1
19.1
17.9
°C/W
RθJB
Junction-to-board thermal resistance
27.7
36.2
21.7
20.2
°C/W
ψJT
Junction-to-top characterization
parameter
0.5
8.1
0.5
0.5
°C/W
ψJB
Junction-to-board characterization
parameter
27.6
35.6
21.7
19.9
°C/W
(1)
8
For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application
report.
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6.6 Electrical Characteristics: VCCA = 2.7 V to 3.6 V
over recommended operating free-air temperature range for VCCA = 2.7 V to 3.6 V and VCCB = 4.5 V to 5.5 V (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
IOH = –100 µA
B to A
IOH = –12 mA
2.2
2.4
3V
2
IOH = –24 mA
A to B
Control
inputs
II
IOZ
(2)
MAX
4.5 V
4.3
5.5 V
5.3
4.5 V
3.7
5.5 V
4.7
2.7 V to 3.6 V
0.2
IOL = 12 mA
2.7 V
0.4
IOL = 24 mA
3V
0.55
IOL = 100 µA
4.5 V to 5.5 V
0.2
IOL = 24 mA
4.5 V to 5.5 V
0.55
VI = VCCA/VCCB or GND
A or B port VO = VCCA/VCCB or GND
VI = VCCA/VCCB or GND, IO = 0
ΔICC (3)
One input at VCCA/VCCB – 0.6 V,
Other inputs at VCCA/VCCB or GND
Ci
Control
inputs
Cio
A or B port VO = VCCA/VCCB or GND
VI = VCCA/VCCB or GND
UNIT
V
IOL = 100 µA
ICC
(1)
(2)
(3)
TYP (1)
VCC –
0.2
3V
A to B
VOL
MIN
2.7 V
IOH = –100 µA
B to A
VCCB
2.7 V to 3.6 V
IOH = –24 mA
VOH
VCCA
V
3.6 V
5.5 V
±5
µA
3.6 V
5.5 V
±10
µA
3.6 V
5.5 V
40
µA
3 V to 3.6 V
4.5 V to 5.5 V
750
µA
3.3 V
5V
6.5
pF
3.3 V
3.3 V
8.5
pF
Typical values are measured at VCCA = 3.3 V and VCCB = 5 V, TA = 25°C.
For I/O ports, the parameter IOZ includes the input leakage current.
This is the supply current increase for each input that is at one of the specified TTL voltage levels, rather than at 0 or the associated
VCC.
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6.7 Electrical Characteristics: VCCA = 2.3 V to 2.7 V
over recommended operating free-air temperature range for VCCA = 2.3 V to 2.7 V and VCCB = 3 V to 3.6 V (unless otherwise
noted)
PARAMETER
TEST CONDITIONS
VCCA
VCCB
2.3 V to 2.7 V
3 V to 3.6 V
VCCA – 0.2
IOH = –8 mA
2.3 V
3 V to 3.6 V
1.7
IOH = –12 mA
2.7 V
3 V to 3.6 V
1.8
IOH = –100 µA
2.3 V to 2.7 V
3 V to 3.6 V
VCCB – 0.2
IOH = –18 mA
2.3 V to 2.7 V
3V
IOL = 100 µA
2.3 V to 2.7 V
3 V to 3.6 V
0.2
IOL = 12 mA
2.3 V
3 V to 3.6 V
0.6
IOL = 100 µA
2.3 V to 2.7 V
3 V to 3.6 V
0.2
IOL = 18 mA
2.3 V
3V
0.55
IOH = –100 µA
B to A
VOH
A to B
B to A
VOL
A to B
MIN
MAX
UNIT
V
2.2
V
II
Control
inputs
VI = VCCA/VCCB or GND
2.3 V to 2.7 V
3 V to 3.6 V
±5
µA
IOZ (1)
A or B port
VO = VCCA/VCCB or GND
2.3 V to 2.7 V
3 V to 3.6 V
±10
µA
VI = VCCA/VCCB or GND, IO = 0
2.3 V to 2.7 V
3 V to 3.6 V
20
µA
One input at VCCA/VCCB – 0.6 V,
Other inputs at VCCA/VCCB or GND
2.3 V to 2.7 V
3 V to 3.6 V
750
µA
ICC
ΔICC
(1)
(2)
(2)
For I/O ports, the parameter IOZ includes the input leakage current.
This is the increase in supply current for each input that is at one of the specified TTL voltage levels, rather than at 0 or the associated
VCC.
6.8 Switching Characteristics
over recommended operating free-air temperature range (unless otherwise noted) (see Figure 2 through Figure 5)
VCCB = 3.3 V
± 0.3 V
VCCB = 5 V ± 0.5 V
FROM
(INPUT)
TO
(OUTPUT)
MAX
MIN
MAX
A
B
7.6
5.9
1
5.8
B
A
7.6
6.7
1.2
5.8
ten
OE
B
11.5
9.3
1
8.9
ns
tdis
OE
B
10.5
9.2
2.1
9.5
ns
ten
OE
A
12.3
10.2
2
9.1
ns
tdis
OE
A
9.3
9
2.9
8.6
ns
PARAMETER
VCCA = 2.5 V
± 0.2 V
MIN
tpd
VCCA = 3.3 V
± 0.3 V
VCCA = 2.7 V
MAX
MIN
UNIT
ns
6.9 Operating Characteristics
TA = 25°C
PARAMETER
TEST CONDITIONS
Outputs enabled (B)
Cpd
Power dissipation capacitance
Outputs disabled (B)
Outputs enabled (A)
Outputs disabled (A)
10
CL = 50 pF, f = 10 MHz
CL = 50 pF, f = 10 MHz
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VCCB = 3.3 V
VCCB = 5 V
VCCA = 2.5 V
VCCA = 3.3 V
TYP
TYP
55
56
27
6
118
56
58
6
UNIT
pF
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6.10 Typical Characteristics
2.85
2.7
VOH (V)
2.55
2.4
2.25
2.1
1.95
-24
-20
-16
-12
IOH (mA)
-8
-4
0
D001
Figure 1. VOH vs IOH
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7 Parameter Measurement Information
7.1 VCCA = 2.5 V ± 0.2 V to VCCB = 3.3 V ± 0.3 V
VCCB = 6 V
500 W
From Output
Under Test
S1
Open
GND
CL = 30 pF
(see Note A)
TEST
S1
tpd
tPLZ/tPZL
tPHZ/tPZH
Open
VCCB = 6 V
GND
500 W
LOAD CIRCUIT
VCCA
Output
Control
(low-level
enabling)
VCCA/2
0V
tPZL
VCCA
Input
VCCA/2
VCCA/2
0V
tPLH
tPHL
VOHB
Output
1.5 V
1.5 V
VOLB
tPLZ
VCCB
Output
Waveform 1
S1 at 6 V
(see Note B)
Output
Waveform 2
S1 at GND
(see Note B)
VCCA/2
1.5 V
VOL + 0.3 V
VOLB
tPZH
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
tPHZ
1.5 V
VOH − 0.3 V
VOHB
0V
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES
NOTES: A. CL includes probe and jig capacitance.
B. Waveform 1 is for an output with internal conditions such that the output is low, except when disabled by the output control.
Waveform 2 is for an output with internal conditions such that the output is high, except when disabled by the output control.
C. All input pulses are supplied by generators having the following characteristics: PRR≤10 MHz, ZO = 50 W, t r ≤2 ns, t f ≤2 ns.
D. The outputs are measured one at a time, with one transition per measurement.
E. tPLZ and tPHZ are the same as t dis.
F. t PZL and tPZH are the same as t en.
G. tPLH and tPHL are the same as t pd.
Figure 2. Load Circuit and Voltage Waveforms
12
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7.2 VCCB = 3.3 V ± 0.3 V to VCCA = 2.5 V ± 0.2 V
2 × VCCA
S1
500 W
From Output
Under Test
Open
GND
CL = 30 pF
(see Note A)
500 W
TEST
S1
tpd
tPLZ/tPZL
tPHZ/tPZH
Open
2 × VCCA
GND
LOAD CIRCUIT
Output
Control
(low-level
enabling)
2.7 V
1.5 V
0V
tPLZ
tPZL
2.7 V
1.5 V
Input
1.5 V
0V
tPLH
VCCA/2
VCCA
VCCA/2
VCCA/2
VOLA
Output
Waveform 2
S1 at GND
(see Note B)
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
VOL + 0.15 V
VOLA
tPHZ
tPZH
VOHA
Output
Output
Waveform 1
S1 at 2 × VCCA
(see Note B)
tPHL
1.5 V
VCCA/2
VOHA
VOH − 0.15 V
0V
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES
NOTES: A. CL includes probe and jig capacitance.
B. Waveform 1 is for an output with internal conditions such that the output is low, except when disabled by the output control.
Waveform 2 is for an output with internal conditions such that the output is high, except when disabled by the output control.
C. All input pulses are supplied by generators having the following characteristics: PRR≤10 MHz, ZO = 50 W, tr ≤2 ns, t f ≤2 ns.
D. The outputs are measured one at a time, with one transition per measurement.
E. tPLZ and tPHZ are the same as tdis.
F. t PZL and tPZH are the same as ten.
G. tPLH and tPHL are the same as tpd.
Figure 3. Load Circuit and Voltage Waveforms
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7.3 VCCA = 3.3 V ± 0.3 V to VCCB = 5 V ± 0.5 V
2 ´ VCCB
S1
500 Ω
From Output
Under Test
Open
GND
CL = 50 pF
(see Note A)
TEST
S1
tpd
tPLZ/tPZL
tPHZ/tPZH
Open
2 ´ VCCB
GND
500 Ω
2.7 V
Output
Control
(low-level
enabling)
LOAD CIRCUIT
1.5 V
0V
tPLZ
tPZL
2.7 V
Input
1.5 V
1.5 V
0V
tPLH
50% VCCB
≈VCCB
50% VCCB
50% VCCB
VOL
20% VCCB
VOL
tPHZ
tPZH
VOH
Output
Output
Waveform 1
S1 at 2 ´ VCCB
(see Note B)
tPHL
1.5 V
Output
Waveform 2
S1 at GND
(see Note B)
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
50% VCCB
80% VCCB
VOH
0V
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES
NOTES: A. CL includes probe and jig capacitance.
B. Waveform 1 is for an output with internal conditions such that the output is low, except when disabled by the output control.
Waveform 2 is for an output with internal conditions such that the output is high, except when disabled by the output control.
C. All input pulses are supplied by generators having the following characteristics: PRR≤ 10 MHz, ZO = 50 Ω, tr ≤ 2.5 ns, t f ≤ 2.5 ns.
D. The outputs are measured one at a time, with one transition per measurement.
E. tPLZ and tPHZ are the same as tdis.
F. t PZL and tPZH are the same as ten.
G. tPLH and tPHL are the same as tpd.
Figure 4. Load Circuit and Voltage Waveforms
14
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7.4 VCCB = 5 V ± 0.5 V to VCCA = 2.7 V and 3.3 V ± 0.3 V
S1
500 Ω
From Output
Under Test
VCCA = 6 V
TEST
S1
Open
tpd
tPLZ/tPZL
tPHZ/tPZH
Open
VCCA = 6 V
GND
GND
CL = 50 pF
(see Note A)
500 Ω
3V
Output
Control
(low-level
enabling)
LOAD CIRCUIT
1.5 V
0V
tPLZ
tPZL
3V
Input
1.5 V
1.5 V
0V
tPLH
1.5 V
≈3 V
1.5 V
1.5 V
VOLA
tPHZ
Output
Waveform 2
S1 at GND
(see Note B)
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
VOL + 0.3 V
VOLA
tPZH
VOHA
Output
Output
Waveform 1
S1 at 6 V
(see Note B)
tPHL
1.5 V
1.5 V
VOH − 0.3 V
VOHA
0V
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES
NOTES: A. CL includes probe and jig capacitance.
B. Waveform 1 is for an output with internal conditions such that the output is low, except when disabled by the output control.
Waveform 2 is for an output with internal conditions such that the output is high, except when disabled by the output control.
C. All input pulses are supplied by generators having the following characteristics: PRR≤ 10 MHz, ZO = 50 Ω, tr ≤ 2.5 ns, tf ≤ 2.5 ns.
D. The outputs are measured one at a time, with one transition per measurement.
E. tPLZ and tPHZ are the same as tdis.
F. t PZL and tPZH are the same as ten.
G. tPLH and tPHL are the same as tpd.
Figure 5. Load Circuit and Voltage Waveforms
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8 Detailed Description
8.1 Overview
The SN74ALVC16245 device is designed for asynchronous communication between data buses. The controlfunction implementation minimizes external timing requirements.
This device can be used as two 8-bit transceivers or one 16-bit transceiver. It allows data transmission from the
A bus to the B bus or from the B bus to the A bus, depending on the logic level at the direction-control (DIR)
input. The output-enable (OE) input can be used to disable the device so that the buses are effectively isolated.
To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup
resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
Inputs can be driven from either 3.3-V or 5-V devices. This feature allows the use of this device as a translator in
a mixed 3.3-V and 5-V system environment.
8.2 Functional Block Diagram
1DIR
1
2DIR
48
1A1
25
1OE
47
2A1
2
24
2OE
36
13
1B1
2B1
To Seven Other Channels
To Seven Other Channels
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Figure 6. Logic Diagram (Positive Logic)
8.3 Feature Description
The SN74ALVC164245 can output 24 mA drive at 3.3V VCC. This device allows down voltage translations and
accepts input voltages to VCC + 0.5V. This device is useful for high-speed applications because of the low tpd.
8.4 Device Functional Modes
Table 3 lists the functions of the device.
Table 3. Function Table (1)
(Each 8-Bit Section)
CONTROL INPUTS
OE
(1)
16
OUTPUT CIRCUITS
B PORT
OPERATION
DIR
A PORT
L
L
Enabled
Hi-Z
B data to A bus
L
H
Hi-Z
Enabled
A data to B bus
H
X
Hi-Z
Hi-Z
Isolation
Input circuits of the data I/Os always are active.
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9 Application 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 SN74ALVC16245 device is a 16-bit bidirectional transceiver. This device can be used as two 8-bit
transceivers or one 16-bit transceiver. It allows data transmission from the A bus to the B bus or from the B bus
to the A bus, depending on the logic level at the direction-control (DIR) input. The output-enable (OE) input can
be used to disable the device so that the buses are effectively isolated. This allows it to be used in multi-power
systems and for down translation as well.
9.2 Typical Application
Regulated 3.6 V
OE
VCC
DIR
A1
uC or
System Logic
A8
B1
B8
uC
System Logic
LEDs
GND
Figure 7. Typical Application Schematic
9.2.1 Design Requirements
This device uses CMOS technology and has balanced output drive. Take care to avoid bus contention because it
can drive currents that would exceed maximum limits. The high drive also creates fast edges into light loads;
therefore, routing and load conditions must be considered to prevent ringing.
9.2.2 Detailed Design Procedure
1. Recommended Input Conditions
– Rise time and fall time specs: See (Δt/ΔV) in Recommended Operating Conditions: VCCB at 3.3 V.
– Specified high and low levels: See (VIH and VIL) in Recommended Operating Conditions: VCCB at 3.3 V.
2. Recommend Output Conditions
– Load currents should not exceed 50 mA per output and 100 mA total for the part.
– Outputs should not be pulled above VCC.
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Typical Application (continued)
9.2.3 Application Curve
0.55
0.5
VOL (V)
0.45
0.4
0.35
0.3
0.25
0.2
1 PA
5mA
10 mA
15 mA
20 mA
IOL
24 mA
D001
Figure 8. VOH vs IOH
18
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10 Power Supply Recommendations
TI level-translation devices offer an opportunity for successful mixed-voltage signal design. A proper power-up
sequence must always be followed to avoid excessive supply current, bus contention, oscillations, or other
anomalies caused by improperly biased device pins. Take these precautions to guard against such power-up
problems:
1. Connect ground before any supply voltage is applied.
2. Power up the control side of the device (VCCA for all four of these devices).
3. Tie OE to VCCA with a pullup resistor so that it ramps with VCCA.
4. Depending on the direction of the data path, DIR can be high or low. If DIR high is needed (A data to B bus),
ramp it with VCCA. Otherwise, keep DIR low.
For more information, see the TI application report, Texas Instruments Voltage-Level-Translation Devices
(SCEA021).
11 Layout
11.1 Layout Guidelines
When using multiple bit logic devices, inputs should not float. In many cases, functions or parts of functions of
digital logic devices are unused. Some examples are when only two inputs of a triple-input AND gate are used,
or when only 3 of the 4-buffer gates are used. Such input pins should not be left unconnected because the
undefined voltages at the outside connections result in undefined operational states.
Specified in the Figure 9 are rules that must be observed under all circumstances. All unused inputs of digital
logic devices must be connected to a high or low bias to prevent them from floating. The logic level that should
be applied to any particular unused input depends on the function of the device. Generally they will be tied to
GND or VCC, whichever makes more sense or is more convenient. It is acceptable to float outputs unless the part
is a transceiver. If the transceiver has an output enable pin, it will disable the outputs section of the part when
asserted. This will not disable the input section of the I/Os so they also cannot float when disabled.
11.2 Layout Example
Vcc
Unused Input
Input
Output
Unused Input
Output
Input
Figure 9. Layout Diagram
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12 Device and Documentation Support
12.1 Documentation Support
12.1.1 Related Documentation
For related documentation see the following:
• Texas Instruments Voltage-Level-Translation Devices (SCEA021)
• Implications of Slow or Floating CMOS Inputs (SCBA004)
12.2 Receiving Notification of Documentation Updates
To receive notification of documentation updates, navigate to the device product folder on ti.com. In the upper
right corner, click on Alert me to register and receive a weekly digest of any product information that has
changed. For change details, review the revision history included in any revised document.
12.3 Community Resource
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.
12.4 Trademarks
Widebus, E2E are trademarks of Texas Instruments.
All other trademarks are the property of their respective owners.
12.5 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.
12.6 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.
20
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PACKAGE OPTION ADDENDUM
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15-Jan-2021
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)
(3)
Device Marking
(4/5)
(6)
74ALVC164245DGGRE4
ACTIVE
TSSOP
DGG
48
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
ALVC164245
74ALVC164245DGGRG4
ACTIVE
TSSOP
DGG
48
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
ALVC164245
74ALVC164245DGGTE4
ACTIVE
TSSOP
DGG
48
250
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
ALVC164245
74ALVC164245DGGTG4
ACTIVE
TSSOP
DGG
48
250
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
ALVC164245
74ALVC164245DLG4
ACTIVE
SSOP
DL
48
25
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
ALVC164245
74ALVC164245DLRG4
ACTIVE
SSOP
DL
48
1000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
ALVC164245
SN74ALVC164245DGG
ACTIVE
TSSOP
DGG
48
40
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
SN74ALVC164245DGGR
ACTIVE
TSSOP
DGG
48
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
ALVC164245
SN74ALVC164245DGGT
ACTIVE
TSSOP
DGG
48
250
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
ALVC164245
SN74ALVC164245DL
ACTIVE
SSOP
DL
48
25
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
ALVC164245
SN74ALVC164245DLR
ACTIVE
SSOP
DL
48
1000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
ALVC164245
ALVC164245
(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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