SN54ALS157A, SN54ALS158
SN74ALS157A, SN74ALS158, SN74AS157, SN74AS158
QUAD 1 OF 2 DATA SELECTORS/MULTIPLEXERS
SDAS081C − APRIL 1982 − REVISED DECEMBER 1994
logic diagrams (positive logic)
1A
2
′ALS157A
1A
4
1B
3
1Y
1B
2
′ALS158
4
3
1Y
2A
5
7
2A
2Y
2B
5
7
6
2Y
2B
6
3A
11
9
3A
3Y
3B
11
9
10
3Y
3B
10
4A
14
12
4A
4Y
4B
G
A /B
14
12
13
15
1
4Y
4B
G
A /B
13
15
1
SN74AS157
1A
2
4
1B
2A
3
1Y
1B
2A
7
2B
3A
6
2Y
2B
3A
9
3B
10
3Y
3B
1A
2
SN74AS158
4
3
1Y
5
5
7
6
2Y
11
11
9
10
3Y
4A
14
12
4Y
4A
14
12
4Y
4B
G
A /B
13
15
1
4B
G
A /B
13
15
1
Pin numbers shown are for the D, J, and N packages.
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443
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