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74AC11239N bảng dữ liệu(PDF) 1 Page - Texas Instruments

tên linh kiện 74AC11239N
Giải thích chi tiết về linh kiện  DUAL 2-LINE TO 4-LINE DECODER/DEMULTIPLEXER
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74AC11239N bảng dữ liệu(HTML) 1 Page - Texas Instruments

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D OR N PACKAGE
(TOP VIEW)
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
1Y1
1Y2
1Y3
GND
2Y0
2Y1
2Y2
2Y3
1Y0
1A
1B
1G
VCC
2G
2A
2B
74AC11239
DUAL 2–LINE TO 4–LINE DECODER/DEMULTIPLEXER
SCAS072A – JULY 1989 – REVISED APRIL 1993
Copyright
© 1993, Texas Instruments Incorporated
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251–1443
Designed Specifically for High-Speed
Memory Decoders and Data Transmission
Systems
Incorporates Two Enable Inputs to Simplify
Cascading and/or Data Reception
Flow-Through Architecture to Optimize
PCB Layout
Center-Pin V
CC and GND Configurations to
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, and Standard Plastic
300-mil DIPs
description
The 74AC11239 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 74AC11239 is comprised of two individual two-line to four-line decoders in a single package. The active-low
enable input can be used as a data line in demultiplexing applications. These decoders/demultiplexers feature
fully buffered inputs, each of which represents only one normalized load to its driving circuit.
The 74AC11239 is characterized for operation from – 40
°C to 85°C.
FUNCTION TABLE
ENABLE INPUT
SELECT INPUTS
OUTPUTS
G
A
B
Y0
Y1
Y2
Y3
H
X
X
L
L
L
L
L
L
LH
LL
L
L
H
LL
HL
L
L
L
HL
LHL
L
H
H
L
L
L
H
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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