54ACT11138 Datasheet, PDF (1/7 Pages) Texas Instruments – 3-LINE TO 8-LINE DECODERS/DEMULTIPLEXERS

54ACT11138, 74ACT11138
3-LINE TO 8-LINE DECODERS/DEMULTIPLEXERS
SCAS050A – D3266, JANUARY 1989 – REVISED APRIL 1993
• Designed Specifically for High-Speed
54ACT11138 . . . J PACKAGE
Memory Decoders and Data Transmission
74ACT11138 . . . D, N, OR PW PACKAGE
Systems
(TOP VIEW)
• Incorporates Three Enable Inputs to
Simplify Cascading and/or Data Reception
• Flow-Through Architecture Optimizes
PCB Layout
• Center-Pin V_CC and GND Configurations
Minimize High-Speed Switching Noise
t • EPIC (Enhanced-Performance Implanted
Y1 ¹
Y2 ²
Y3 ³
GND ⁴
Y4 ⁵
Y5 ⁶
Y6 ⁷
16 _Y0
15 _A
14 _B
13 _C
12 _VCC
11 _G1
10 _G2A
CMOS) 1-mm Process
Y7 ⁸
9 _G2B
• 650-mA Typical Latch-Up Immunity
at 125°C
• Package Options Include Plastic
Small-Outline Packages, Plastic Thin
54ACT11138 . . . FK PACKAGE
(TOP VIEW)
Shrink Small-Outline Packages, Ceramic
Chip Carriers, and Standard Plastic and
Ceramic 300-mil DIPs
3 2 1 20 19
A4
18 G2A
description
Y0 5
17 G2B
The ′ACT11138 circuit is designed to be used in
high-performance memory-decoding or data-
routing applications requiring very short
NC ⁶
16 _NC
Y1 ⁷
15 _Y7
Y2
8
14
9 10 11 12 13
Y6
propagation delay times. In high-performance
memory systems, this decoder can be used to
minimize the effects of system decoding. When
employed with high-speed memories utilizing a
NC – No internal connection
fast enable circuit, the delay times of this decoder
and the enable time of the memory are usually less than the typical access time of the memory. This means
that the effective system delay introduced by the decoder is negligible.
The conditions at the binary select inputs and the three enable inputs select one of eight input lines. Two
active-low and one active-high enable inputs reduce the need for external gates or inverters when expanding.
A 24-line decoder can be implemented without external inverters and a 32-line decoder requires only one
inverter. An enable input can be used as a data input for demultiplexing applications.
The 54ACT11138 is characterized for operation over the full military temperature range of – 55°C to 125°C. The
74ACT11138 is characterized for operation from – 40°C to 85°C.
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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