54ACT16825, 74ACT16825
18-BIT BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
SCAS155B – JANUARY 1991 – REVISED APRIL 1996
54ACT16825 . . . DW PACKAGE
74ACT16825 . . . DL PACKAGE
(TOP VIEW)
Members of the Texas Instruments
Widebus Family
Inputs Are TTL-Voltage Compatible
Provide Extra Data Width Necessary for
Wider Address/Data Paths or Buses With
Parity
1OE1
1Y1
1Y2
GND
1Y3
1Y4
1OE2
1A1
1A2
GND
1A3
1A4
1
56
55
54
53
52
51
50
49
48
47
46
45
2
3
Flow-Through Architecture Optimizes
PCB Layout
4
5
6
Distributed V
Minimizes High-Speed Switching Noise
and GND Pin Configuration
CC
V
V
7
CC
CC
1Y5
1Y6
1Y7
GND
1Y8
1A5
1A6
1A7
GND
1A8
8
EPIC (Enhanced-Performance Implanted
CMOS) 1-µm Process
9
10
11
12
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
Spacings
1Y9 13
GND 14
GND 15
2Y1 16
44 1A9
43 GND
42 GND
41 2A1
17
18
19
20
21
22
23
24
25
26
27
28
40
39
38
37
36
35
34
33
32
31
30
29
2Y2
GND
2Y3
2Y4
2Y5
2A2
GND
2A3
2A4
2A5
description
The ’ACT16825 18-bit buffers/drivers are
designed specifically to improve both the
performance and density of 3-state memory
address drivers, clock drivers, and bus-oriented
receivers and transmitters.
V
V
CC
CC
2Y6
2Y7
GND
2Y8
2Y9
2A6
2A7
GND
2A8
2A9
The ’ACT16825 can be used as two 9-bit buffers
or one 18-bit buffer. They provide true data from
A to Y.
The 3-state control gate is a 2-input NOR gate;
therefore, if either output-enable (OE1 or OE2)
input is high, all nine affected outputs are in the
high-impedance state.
2OE1
2OE2
The 74ACT16825 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 54ACT16825 is characterized for operation over the full military temperature range of –55°C to 125°C. The
74ACT16825 is characterized for operation from –40°C to 85°C.
FUNCTION TABLE
(each 9-bit section)
INPUTS
OUTPUT
Y
OE2
L
A
L
OE1
L
L
H
Z
Z
L
L
H
X
X
H
X
X
H
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
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
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