Texas Instruments SN74LVC4245ADBR, SN74LVC4245ADW, SN74LVC4245ADWR, SN74LVC4245APWR Datasheet
OPERATION
SN74LVC4245A
OCTAL BUS TRANSCEIVER AND 3.3-V TO 5-V SHIFTER
WITH 3-STATE OUTPUTS
SCAS375D – MARCH 1994 – REVISED JUNE 1998
D
EPIC
(Enhanced-Performance Implanted
CMOS) Submicron Process
D
3.3-V to 5-V Bidirectional Level Shifter
D
Latch-Up Performance Exceeds 250 mA Per
JESD 17
D
Package Options Include Plastic
Small-Outline (DW), Shrink Small-Outline
(DB), and Thin Shrink Small-Outline (PW)
Packages
description
This 8-bit (octal) noninverting bus transceiver
contains two separate supply rails; B port has
V
, which is set at 3.3 V , and A port has V
CCB
CCA
,
DB, DW, OR PW PACKAGE
(TOP VIEW)
(5 V) V
CCA
DIR
A1
A2
A3
A4
A5
A6
A7
A8
GND
GND
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
V
CCB
V
CCB
OE
B1
B2
B3
B4
B5
B6
B7
B8
GND
(3.3 V)
(3.3 V)
which is set at 5 V . This allows for translation from
a 3.3-V to a 5-V environment, and vice versa.
The SN74L VC4245A is designed for asynchronous communication between data buses. The device transmits
data 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 the buses are
effectively isolated.
The SN74LVC4245A pinout allows the designer to switch to a normal all-3.3-V or all-5-V 20-pin ’245 device
without board re-layout. The designer uses the data paths for pins 2–1 1 and 14–23 of the SN74LVC4245A to
align with the conventional ’245 pinout.
The SN74LVC4245A is characterized for operation from –40°C to 85°C.
FUNCTION TABLE
INPUTS
OE DIR
L L B data to A bus
L H A data to B bus
H X Isolation
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
EPIC is a trademark of Texas Instruments Incorporated.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
Copyright 1998, Texas Instruments Incorporated
1
SN74LVC4245A
OCTAL BUS TRANSCEIVER AND 3.3-V TO 5-V SHIFTER
WITH 3-STATE OUTPUTS
SCAS375D – MARCH 1994 – REVISED JUNE 1998
logic diagram (positive logic)
2
DIR
3
A1
To Seven Other Channels
22
21
OE
B1
absolute maximum ratings over operating free-air temperature range for V
otherwise noted)
Supply voltage range, V
Input voltage range, VI: A port (see Note 1) –0.5 V to V
†
–0.5 V to 6.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CCA
= 5 V (unless
CCA
CCA
+ 0.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Control inputs –0.5 V to 6 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output voltage range, V
: A port (see Note 1) –0.5 V to V
O
CCA
+ 0.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input clamp current, IIK (VI < 0) –50 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output clamp current, IOK (VO < 0) –50 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous output current, IO ±50 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous current through each V
Package thermal impedance, θ
JA
or GND ±100 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CCA
(see Note 2): DB package 104°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DW package 81°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PW package 120°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range, T
†
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTES: 1. This value is limited to 6 V maximum.
2. The package thermal impedance is calculated in accordance with JESD 51.
–65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
stg
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
IOHHigh-level output current
mA
IOLLow-level output current
mA
SN74LVC4245A
OCTAL BUS TRANSCEIVER AND 3.3-V TO 5-V SHIFTER
WITH 3-STATE OUTPUTS
SCAS375D – MARCH 1994 – REVISED JUNE 1998
absolute maximum ratings over operating free-air temperature range for V
otherwise noted)
Supply voltage range, V
Input voltage range, VI: B port (see Note 3) –0.5 V to V
Output voltage range, VO: B port (see Note 3) –0.5 V to V
Input clamp current, I
†
–0.5 V to 4.6 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CCB
(VI < 0) –50 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
IK
= 3.3 V (unless
CCB
CCB
CCB
+ 0.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
+ 0.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output clamp current, IOK (VO < 0) –50 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous output current, IO ±50 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous current through V
Package thermal impedance, θ
or GND ±100 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CCB
(see Note 2): DB package 104°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
JA
DW package 81°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PW package 120°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range, T
†
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTES: 2. The package thermal impedance is calculated in accordance with JESD 51.
3. This value is limited to 4.6 V maximum.
recommended operating conditions for V
V
V
V
V
V
I
OH
I
OL
T
NOTE 4: All unused inputs of the device must be held at the associated VCC or GND to ensure proper device operation. Refer to the TI application
Supply voltage 4.5 5.5 V
CCA
High-level input voltage 2 V
IH
Low-level input voltage 0.8 V
IL
Input voltage 0 V
I
Output voltage 0 V
O
High-level output current –24 mA
Low-level output current 24 mA
Operating free-air temperature –40 85 °C
A
report,
Implications of Slow or Floating CMOS Inputs
–65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
stg
= 5 V (see Note 4)
CCA
, literature number SCBA004.
MIN MAX UNIT
CCA
CCA
V
V
recommended operating conditions for V
V
CCB
V
IH
V
IL
V
I
V
O
T
A
NOTE 4: All unused inputs of the device must be held at the associated VCC or GND to ensure proper device operation. Refer to the TI application
= 3.3 V (see Note 4)
CCB
MIN MAX UNIT
Supply voltage 2.7 3.6 V
High-level input voltage V
Low-level input voltage V
Input voltage 0 V
Output voltage 0 V
p
p
Operating free-air temperature –40 85 °C
report,
Implications of Slow or Floating CMOS Inputs
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
, literature number SCBA004.
= 2.7 V to 3.6 V 2 V
CCB
= 2.7 V to 3.6 V 0.8 V
CCB
V
= 2.7 V –12
CCB
V
= 3 V –24
CCB
V
= 2.7 V 12
CCB
V
= 3 V 24
CCB
CCB
CCB
V
V
3
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