74AC11640
OCTAL BUS TRANSCEIVER
WITH 3–STATE OUTPUTS
SCAS052A – JULY 1987 – REVISED APRIL 1993
Copyright  1993, Texas Instruments Incorporated

1POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
• Bidirectional Bus Transceivers in
High-Density 24-Pin Packages
• Flow-Through Architecture Optimizes PCB
Layout
• Center-Pin V
CC
and GND Configurations
Minimize High-Speed Switching Noise
• EPIC  (Enhanced-Performance Implanted
CMOS) 1-m m Process
• 500-mA Typical Latch-Up Immunity at
125°C
• Package Options Include Plastic
Small-Outline Packages and Standard
Plastic 300-mil DIPs

description
These octal bus transceivers are designed for asynchronous communication between data buses. These
devices transmit data from the A bus to the B bus or from the B bus to the A bus depending upon the 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.
The 74AC11640 is characterized for operation from –40°C to 85°C.
FUNCTION TABLE
INPUTS
OPERATION
OE DIR
L L B data to A bus
L HA data to B bus
H X Isolation
DW OR NT PACKAGE
(TOP VIEW)
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
A1
A2
A3
A4
GND
GND
GND
GND
A5
A6
A7
A8
DIR
B1
B2
B3
B4
V
CC
V
CC
B5
B6
B7
B8
OE
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.