SN54ACT245, SN74ACT245
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCAS452D – SEPTEMBER 1994 – REVISED JANUARY 2000
SN54ACT245 . . . J OR W PACKAGE
SN74ACT245 . . . DB, DW, N, OR PW PACKAGE
(TOP VIEW)
Inputs Are TTL-Voltage Compatible
EPIC (Enhanced-Performance Implanted
CMOS) 1- m Process
DIR
A1
A2
A3
A4
A5
A6
A7
A8
V
CC
19 OE
1
2
3
4
5
6
7
8
9
20
Package Options Include Plastic
Small-Outline (DW) Shrink Small-Outline
(DB), and Thin Shrink Small-Outline (PW)
Packages, Ceramic Chip Carriers (FK) and
Flatpacks (W), and Standard Plastic (N) and
Ceramic (J) DIPs
18 B1
17
B2
16 B3
15 B4
14 B5
13 B6
12 B7
11 B8
description
These octal bus transceivers are designed for
asynchronous two-way communication between
data buses. The control-function implementation
minimizes external timing requirements.
GND 10
SN54ACT245 . . . FK PACKAGE
(TOP VIEW)
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.
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
The SN54ACT245 is characterized for operation
over the full military temperature range of –55°C
to 125°C. The SN74ACT245 is characterized for
operation from –40°C to 85°C.
9 10 11 12 13
FUNCTION TABLE
(each transceiver)
INPUTS
OPERATION
OE
L
DIR
L
B data to A bus
A data to B bus
Isolation
L
H
H
X
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.
Copyright 2000, 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
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