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SCAS461F − FEBRUARY 1995 − REVISED OCTOBER 2003
SN54AC245 . . . J OR W PACKAGE
SN74AC245 . . . DB, DW, N, NS, OR PW PACKAGE
(TOP VIEW)
D
D
D
2-V to 6-V V
Operation
CC
Inputs Accept Voltages to 6 V
Max t of 7 ns at 5 V
pd
DIR
A1
A2
A3
A4
A5
A6
A7
V
CC
19 OE
1
2
3
4
5
6
7
8
9
10
20
description/ordering information
18
17
16
15
14
13
12
11
B1
B2
B3
B4
B5
B6
B7
B8
The ’AC245 octal bus transceivers are designed
for asynchronous two-way communication
between data buses. The control-function
implementation minimizes external timing
requirements.
When the output-enable (OE) is low, the device
passes noninverted 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.
A high on OE disables the device so that the buses
are effectively isolated.
A8
GND
SN54AC245 . . . FK PACKAGE
(TOP VIEW)
To ensure the high-impedance state during power
up or power down, OE should be tied to V
CC
through a pullup resistor; the minimum value of
the resistor is determined by the current-sinking
capability of the driver.
3
2
1
20 19
18
B1
B2
B3
A3
A4
A5
A6
A7
4
5
6
7
8
17
16
15 B4
14 B5
9 10 11 12 13
ORDERING INFORMATION
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
†
PACKAGE
T
A
PDIP − N
Tube
SN74AC245N
SN74AC245N
Tube
SN74AC245DW
SN74AC245DWR
SN74AC245NSR
SN74AC245DBR
SN74AC245PW
SN74AC245PWR
SNJ54AC245J
SOIC − DW
AC245
Tape and reel
Tape and reel
Tape and reel
Tube
SOP − NS
AC245
AC245
−40°C to 85°C
SSOP − DB
TSSOP − PW
AC245
Tape and reel
Tube
CDIP − J
CFP − W
LCCC − FK
SNJ54AC245J
SNJ54AC245W
SNJ54AC245FK
Tube
SNJ54AC245W
SNJ54AC245FK
−55°C to 125°C
Tube
†
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are
available at www.ti.com/sc/package.
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.
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Copyright 2003, Texas Instruments Incorporated
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