54ACT16825_08 Datasheet, PDF (1/10 Pages) Texas Instruments – 18-BIT BUFFERS/DRIVERS WITH 3-STATE OUTPUTS

54ACT16825, 74ACT16825
18-BIT BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
SCAS155B – JANUARY 1991 – REVISED APRIL 1996
D Members of the Texas Instruments
Widebus ™ Family
D Inputs Are TTL-Voltage Compatible
D Provide Extra Data Width Necessary for
Wider Address/Data Paths or Buses With
Parity
D Flow-Through Architecture Optimizes
PCB Layout
D Distributed V_CC and GND Pin Configuration
Minimizes High-Speed Switching Noise
D EPIC™ (Enhanced-Performance Implanted
CMOS) 1-µm Process
D 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
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.
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.
54ACT16825 . . . DW PACKAGE
74ACT16825 . . . DL PACKAGE
(TOP VIEW)
1OE1 ₁
1Y1 ₂
1Y2 ₃
GND 4
1Y3 5
1Y4 6
V_CC 7
1Y5 8
1Y6 9
1Y7 10
GND 11
1Y8 12
1Y9 13
GND 14
GND 15
2Y1 16
2Y2 17
GND 18
2Y3 19
2Y4 20
2Y5 21
V_CC 22
2Y6 23
2Y7 24
GND 25
2Y8 ²⁶
2Y9 ²⁷
2OE1 ²⁸
56 ^1OE2
55 ^1A1
54 ^1A2
53 GND
52 1A3
51 1A4
50 V_CC
49 1A5
48 1A6
47 1A7
46 GND
45 1A8
44 1A9
43 GND
42 GND
41 2A1
40 2A2
39 GND
38 2A3
37 2A4
36 2A5
35 V_CC
34 2A6
33 2A7
32 GND
31 _2A8
30 _2A9
29 _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
OE1 OE2 A
OUTPUT
Y
L
L
L
L
L
L
H
H
H
X
X
Z
X
H
X
Z
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.
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.
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265
Copyright © 1996, Texas Instruments Incorporated
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