74ACT11643 Datasheet, PDF (1/5 Pages) Texas Instruments – OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS

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• Bidirectional Bus Transceivers in
High-Density 24-Pin Packages
• Inputs Are TTL-Voltage Compatible
• Flow-Through Architecture to Optimize
PCB Layout
• Center-Pin V_CC and GND Configurations to
Minimize High-Speed Switching Noise
• EPICt (Enhanced-Performance Implanted
CMOS) 1-mm Process
• 500-mA Typical Latch-Up Immunity
at 125°C
• Package Options Include Plastic Small-
Outline Packages, Ceramic Chip Carriers,
and Standard Plastic and Ceramic 300-mil
DIPs
description
These octal bus transceivers are designed for
asynchronous two-way 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 enable input G is used to disable
the device so the buses are effectively isolated.
The 54ACT11640 is characterized for operation
over the full military temperature range of − 55°C
to 125°C. The 74ACT11640 is characterized for
operation from − 40°C to 85°C.
54ACT11640, 74ACT11640
OCTAL BUS TRANSCEIVERS
WITH 3ĆSTATE OUTPUTS
SCAS027A − D2957, JULY 1987 − REVISED APRIL 1993
54ACT11640 . . . JT PACKAGE
74ACT11640 . . . DW OR NT PACKAGE
(TOP VIEW)
A1 1
A2 2
A3 3
A4 4
GND 5
GND 6
GND 7
GND 8
A5 9
A6 10
A7 11
A8 ¹²
24 DIR
23 B1
22 B2
21 B3
20 B4
19 V_CC
18 V_CC
17 B5
16 B6
15 B7
14 B8
13 _G
54ACT11640 . . . FK PACKAGE
(TOP VIEW)
4 3 2 1 28 27 26
B2 5
25 B7
B1 6
24 B8
DIR 7
23 G
NC 8
22 NC
A1 9
21 A8
A2 10
20 A7
A3 11
19 A6
12 13 14 15 16 17 18
NC − No internal connection
FUNCTION TABLE
CONTROL
INPUTS
G
DIR
OPERATION
L
L
B data to A bus
L
H
A data to B bus
H
X
Isolation
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.
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Copyright  1993, Texas Instruments Incorporated
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