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74HC257
Quad 2-Input Multiplexer 3-State
Datasheet (PDF)
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74HC257
DIP-16
1
S
2
1A
3
1B
4
1Y
5
2A
6
2B
7
2Y
8
GND
16
VCC
15
~OE
14
4A
13
4B
12
4Y
11
3A
10
3B
9
3Y
vcc
gnd
in
out
io
Pin Reference
⌄
#
Label
Type
1
S
in
2
1A
in
3
1B
in
4
1Y
out
5
2A
in
6
2B
in
7
2Y
out
8
GND
gnd
9
3Y
out
10
3B
in
11
3A
in
12
4Y
out
13
4B
in
14
4A
in
15
~OE
in
16
VCC
vcc