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SN74AS131A 데이터시트(PDF) 1 Page - Texas Instruments

부품명 SN74AS131A
상세설명  3-LINE TO 8-LINE DECODER/DEMULTIPLEXER WITH ADDRESS REGISTERS
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제조업체  TI1 [Texas Instruments]
홈페이지  http://www.ti.com
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SN74AS131A 데이터시트(HTML) 1 Page - Texas Instruments

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SN74AS131A
3LINE TO 8LINE DECODER/DEMULTIPLEXER
WITH ADDRESS REGISTERS
SDAS060C − APRIL 1982 − REVISED DECEMBER 1994
Copyright
1994, Texas Instruments Incorporated
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251−1443
Combines Decoder and 3-Bit Address
Register
Incorporates Two Enable Inputs to Simplify
Cascading
Package Options Include Plastic
Small-Outline (D) Packages and Standard
Plastic (N) 300-mil DIPs
description
The
SN74AS131A
is
a
3-line
to
8-line
decoder/demultiplexer with registers on the three
address inputs. When the clock (CLK) input goes
from low to high, the device acts as a decoder/
demultiplexer and the address present at the select (A, B, and C) inputs is stored in the registers. Further
address changes are ignored until the next rising transition of CLK. The output-enable (G1, G2) inputs control
the state of the outputs independently of the select or CLK inputs. All of the outputs are high unless G1 is high
and G2 is low. This device is ideally suited for implementing glitch-free decoders in strobed (stored-address)
applications in bus-oriented systems.
The SN74AS131A is characterized for operation from 0
°C to 70°C.
FUNCTION TABLE
INPUTS
OUTPUTS
CLK
ENABLE
SELECT
OUTPUTS
CLK
G1
G2
C
B
A
Y0
Y1
Y2
Y3
Y4
Y5
Y6
Y7
X
X
H
X
X
X
H
H
H
H
H
H
H
H
X
L
XX
XX
H
HH
HH
HH
H
H
L
L
L
L
L
H
H
H
H
H
H
H
H
LL
LH
H
L
H
HH
HH
H
H
LL
HLH
H
L
HH
HH
H
H
LL
HH
H
HH
L
H
HH
H
H
L
H
L
L
H
H
H
H
L
H
H
H
H
LH
LH
H
HH
HH
L
H
H
H
LH
HLH
HH
HH
H
L
H
H
LH
HH
H
HH
HH
HH
L
L or H
H
L
X
X
X
Outputs corresponding to stored address = L; all others = H.
D OR N PACKAGE
(TOP VIEW)
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
A
B
C
CLK
G2
G1
Y7
GND
VCC
Y0
Y1
Y2
Y3
Y4
Y5
Y6
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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