54AC16245, 74AC16245
16-BIT BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCAS235A – MARCH 1990 – REVISED APRIL 1996
Members of the Texas Instruments
Widebus Family
54AC16245 . . . WD PACKAGE
74AC16245 . . . DGG OR DL PACKAGE
(TOP VIEW)
3-State Outputs Drive Bus Lines or Buffer
Memory Address Registers
1DIR
1B1
1B2
GND
1B3
1B4
1OE
1A1
1A2
GND
1A3
1A4
1
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
Flow-Through Architecture Optimizes PCB
Layout
2
3
Distributed V
Minimizes High-Speed Switching Noise
and GND Configuration
4
CC
5
6
EPIC (Enhanced-Performance Implanted
CMOS) 1- m Process
V
7
V
CC
CC
8
1B5
1B6
GND
1B7
1B8
2B1
2B2
GND
2B3
2B4
1A5
1A6
GND
1A7
1A8
2A1
2A2
GND
2A3
2A4
500-mA Typical Latch-Up Immunity at 125°C
9
Package Options Include Plastic Thin
Shrink Small-Outline (DGG) Package,
300-mil Shrink Small-Outline (DL) Package
Using 25-mil Center-to-Center Pin Spacings
and 380-mil Fine-Pitch Ceramic Flat (WD)
Package Using 25-mil Center-to-Center Pin
Spacings
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
description
V
V
CC
CC
The ’AC16245 are 16-bit bus transceivers
organized as dual-octal noninverting 3-state
transceivers designed for asynchronous two-way
communication between data buses. The control
function implementation minimizes external tim-
ing requirements
2B5
2B6
2A5
2A6
GND
2A7
2A8
2OE
GND
2B7
2B8
2DIR
These devices allow data transmission 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. The output-enable input (OE)
can be used to disable the devices so that the
buses are effectively isolated.
The 74AC16245 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 54AC16245 is characterized for operation over the full military temperature range of –55°C to 125°C. The
74AC16245 is characterized for operation from –40°C to 85°C.
FUNCTION TABLE
CONTROL
INPUTS
OPERATION
OE
L
DIR
L
B data to A bus
A data to 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 and Widebus are trademarks of Texas Instruments Incorporated.
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.
1
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