54AC16640, 74AC16640
16-BIT BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCAS240A – JULY 1990 – REVISED APRIL 1996
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POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
Members of the Texas Instruments
Widebus
Family
Flow-Through Architecture Optimizes
PCB Layout
Distributed V
CC
and GND Pin Configuration
Minimizes High-Speed Switching Noise
EPIC
(Enhanced-Performance Implanted
CMOS) 1-µm Process
500-mA Typical Latch-Up Immunity at
125°C
Package Options Include Plastic 300-mil
Shrink Small-Outline (DL) Packages Using
25-mil Center-to-Center Pin Spacings and
380-mil Fine-Pitch Ceramic Flat (WD)
Packages Using 25-mil Center-to-Center
Pin Spacings
description
The ’AC16640 are inverting 16-bit transceivers
designed for asynchronous communication
between data buses.
These devices can be used as two 8-bit
transceivers or one 16-bit transceiver . They allow
data transmission 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 (1DIR and 2DIR)
inputs. The output-enable (1OE
and 2OE) inputs
can be used to disable the device so that the
buses are effectively isolated.
The 74AC16640 is packaged in TI’s shrink small-outline package, which provides twice the I/O pin count and
functionality of standard small-outline packages in the same printed-circuit-board area.
The 54AC16640 is characterized for operation over the full military temperature range of –55°C to 125°C. The
74AC16640 is characterized for operation from –40°C to 85°C.
FUNCTION TABLE
(each section)
INPUTS
OE DIR
L L B data to A bus
L HA data to B bus
H X Isolation
Copyright 1996, Texas Instruments Incorporated
UNLESS OTHERWISE NOTED this document contains PRODUCTION
DATA information 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.
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 and Widebus are trademarks of Texas Instruments Incorporated.
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1DIR
1B1
1B2
GND
1B3
1B4
V
CC
1B5
1B6
GND
1B7
1B8
2B1
2B2
GND
2B3
2B4
V
CC
2B5
2B6
GND
2B7
2B8
2DIR
1OE
1A1
1A2
GND
1A3
1A4
V
CC
1A5
1A6
GND
1A7
1A8
2A1
2A2
GND
2A3
2A4
V
CC
2A5
2A6
GND
2A7
2A8
2OE
54AC16640 . . . WD PACKAGE
74AC16640 . . . DL PACKAGE
(TOP VIEW)