SDAS081C − APRIL 1982 − REVISED DECEMBER 1994
SN54ALS157A, SN54ALS158
SN74ALS157A, SN74ALS158, SN74AS157, SN74AS158
QUAD 1 OF 2 DATA SELECTORS/MULTIPLEXERS
logic symbols
†
′ALS157A,
SN74AS157
15
G
A /B
1A
1B
2A
2B
3A
3B
4A
4B
2
3
5
6
11
10
14
13
12
4Y
9
3Y
7
2Y
1
1
1
EN
G1
MUX
4
15
G
A /B
1A
1Y
1B
2A
2B
3A
3B
4A
4B
2
3
5
6
11
10
14
13
12
4Y
9
3Y
7
2Y
1
1
1
′ALS158,
SN74AS158
EN
G1
MUX
4
1Y
† These symbols are in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
Pin numbers shown are for the D, J, and N packages.
2
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443
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