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SN74ALS155 Datasheet(PDF) 2 Page - Texas Instruments

Part No. SN74ALS155
Description  DUAL 2-LINE TO 4-LINE DECODER/DEMULTIPLEXER
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
Logo TI - Texas Instruments

SN74ALS155 Datasheet(HTML) 2 Page - Texas Instruments

  SN74ALS155 Datasheet HTML 1Page - Texas Instruments SN74ALS155 Datasheet HTML 2Page - Texas Instruments SN74ALS155 Datasheet HTML 3Page - Texas Instruments SN74ALS155 Datasheet HTML 4Page - Texas Instruments  
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OUTPUTS
STROBE
1G
DATA
1C
FUNCTION TABLE
2-LINE TO 4-LINE DECODER
OR
1-LINE TO 4-LINE DEMULTIPLEXER
OUTPUTS
STROBE
2G
DATA
2C
STROBE
OR DATA
SELECT
(0)
(2)
(3)
(4)
(5)
(6)
(7)
(1)
DMUX
2
G4
1G
1
4
1C
14
15
2G
2C
13
0
3
1
A
B
X/Y
1Y0
7
1Y1
6
1Y2
5
1Y3
4
2Y0
9
2Y1
10
2Y3
12
2Y2
11
2
1
13
3
1G
1C
A
B
0
α
1
α
2
α
3
α
1
β
2
β
3
β
&
&
1
2
14
15
2G
2C
EN
β
EN
α
1-LINE TO 4-LINE DEMULTIPLEXER
2-LINE TO 4-LINE DECODER
X/Y
2Y0
9
2Y1
10
2Y2
11
2Y3
12
1Y0
7
1Y1
6
1Y3
4
1Y2
5
13
1
3
2
2
0
1
2
3
A
B
G
DMUX
0
1Y0
7
1Y1
6
1Y2
5
1Y3
4
2Y0
9
2Y1
10
2Y3
12
2Y2
11
0
1
2
3
2Y0
9
2Y1
10
2Y2
11
2Y3
12
1Y0
7
1Y1
6
1Y3
4
1Y2
5
0
1
2
3
4
5
6
7
4
5
6
7
3-LINE TO 8-LINE DECODER
1-LINE TO 8-LINE DEMULTIPLEXER
1
C
15
G
0
3
4
EN
14
2
13
3
2
1
15
14
A
B
G
C
G
0
7
† These symbols are in accordance with ANSI/IEEE Std 91-1984
and IEC Publication 617-12.
‡ C = inputs 1C and 2C connected together
§ G = inputs 1G and 2G connected together
0
β
SN74ALS155
DUAL 2-LINE TO 4-LINE DECODER/DEMULTIPLEXER
SDAS140 — NOVEMBER 1987
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
2
logic symbols(alternatives)
INPUTS
SELECT
B
A
1Y0
1Y1
1Y2
1Y3
X
L
L
H
H
X
X
L
H
L
H
X
H
L
L
L
L
X
X
H
H
H
H
L
H
L
H
H
H
H
H
H
L
H
H
H
H
H
H
L
H
H
H
H
H
H
L
H
INPUTS
SELECT
B
A
2Y0
2Y1
2Y2
2Y3
X
L
L
H
H
X
X
L
H
L
H
X
H
L
L
L
L
X
X
L
L
L
L
H
H
L
H
H
H
H
H
H
L
H
H
H
H
H
H
L
H
H
H
H
H
H
L
H
FUNCTION TABLE
3-LINE TO 8-LINE DECODER
OR
1-LINE TO 8-LINE DEMULTIPLEXER
INPUTS
OUTPUTS
C‡
B
A
2Y0
2Y1
2Y2
2Y3
1Y0
1Y1
1Y2
1Y3
X
L
L
L
L
H
H
H
H
X
L
L
H
H
L
L
H
H
X
L
H
L
H
L
H
L
H
H
L
L
L
L
L
L
L
L
H
L
H
H
H
H
H
H
H
H
H
L
H
H
H
H
H
H
H
H
H
L
H
H
H
H
H
H
H
H
H
L
H
H
H
H
H
H
H
H
H
L
H
H
H
H
H
H
H
H
H
L
H
H
H
H
H
H
H
H
H
L
H
H
H
H
H
H
H
H
H
L


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