SN54ACT245, SN74ACT245
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCAS452E – SEPTEMBER 1994 – REVISED OCTOBER 2002
4.5-V to 5.5-V V
Operation
Max t of 8 ns at 5 V
pd
CC
Inputs Accept Voltages to 5.5 V
Inputs Are TTL-Voltage Compatible
SN54ACT245 . . . J OR W PACKAGE
SN74ACT245 . . . DB, DW, N, NS, OR PW PACKAGE
(TOP VIEW)
SN54ACT245 . . . FK PACKAGE
(TOP VIEW)
DIR
A1
A2
A3
A4
A5
A6
A7
A8
V
CC
1
2
3
4
5
6
7
8
9
20
19 OE
18 B1
17 B2
16 B3
15 B4
14 B5
13 B6
12 B7
11 B8
3
2
1
20 19
18
4
5
6
7
8
B1
B2
B3
B4
B5
A3
A4
A5
A6
A7
17
16
15
14
9 10 11 12 13
GND 10
description/ordering information
These 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 upon the logic level at the direction-control (DIR) input. A high on OE disables
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 V through a pullup
CC
resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
ORDERING INFORMATION
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
†
PACKAGE
T
A
PDIP – N
Tube
SN74ACT245N
SN74ACT245N
Tube
SN74ACT245DW
SN74ACT245DWR
SN74ACT245NSR
SN74ACT245DBR
SN74ACT245PWR
SNJ54ACT245J
SNJ54ACT245W
SNJ54ACT245K
SOIC – DW
ACT245
Tape and reel
Tape and reel
Tape and reel
Tape and reel
Tube
–40°C to 85°C
SOP – NS
SSOP – DB
TSSOP – PW
CDIP – J
ACT245
AD245
AD245
SNJ54ACT245J
SNJ54ACT245W
SNJ54ACT245FK
–55°C to 125°C
CFP – W
Tube
LCCC – FK
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.
Copyright 2002, Texas Instruments Incorporated
On products compliant to MIL-PRF-38535, all parameters are tested
unless otherwise noted. On all other products, production
processing does not necessarily include testing of all parameters.
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.
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
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