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74AC11238 数据表(PDF) 1 Page - Texas Instruments

部件名 74AC11238
功能描述  3-LINE TO 8-LINE DECODERS/DEMULTIPLEXERS
Download  9 Pages
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制造商  TI [Texas Instruments]
网页  http://www.ti.com
标志 TI - Texas Instruments

74AC11238 数据表(HTML) 1 Page - Texas Instruments

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54AC11238, 74AC11238
3-LINE TO 8-LINE DECODERS/DEMULTIPLEXERS
SCAS039A – APRIL 1988 – REVISED APRIL 1993
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
Copyright
© 1993, Texas Instruments Incorporated
2–1
Designed Specifically for High-Speed
Memory Decoders and Data Transmission
Systems
Noninverting Version of ′AC11138
Incorporates 3 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
EPICt (Enhanced-Performance Implanted
CMOS) 1-
mm Process
500-mA Typical Latch-Up Immunity
at 125
°C
Package Options Include Plastic
Small-Outline Packages, Ceramic Chip
Carriers, and Standard Plastic and Ceramic
300-mil DIPs
description
The
′AC11238 circuit is designed to be
used in high-performance memory-decoding or
data-routing applications requiring very short
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
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 54AC11238 is characterized for operation over the full military temperature range of – 55
°C to 125°C. The
74AC11238 is characterized for operation from – 40
°C to 85°C.
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.
54AC11238 ...J PACKAGE
74AC11238 ...D OR N PACKAGE
(TOP VIEW)
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
Y1
Y2
Y3
GND
Y4
Y5
Y6
Y7
Y0
A
B
C
VCC
G1
G2A
G2B
3
2
1 20 19
9 10 11 12 13
4
5
6
7
8
18
17
16
15
14
A
Y0
NC
Y1
Y2
54AC11238 . . . FK PACKAGE
(TOP VIEW)
NC – No internal connection
G2A
G2B
NC
Y7
Y6
EPIC is a trademark of Texas Instruments Incorporated.


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