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74HC181
4-Bit Arithmetic Logic Unit
Datasheet (PDF)
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74HC181
DIP-24
1
B0
2
A0
3
S3
4
S2
5
S1
6
S0
7
~CIN
8
M
9
~F0
10
~F1
11
~F2
12
GND
24
VCC
23
A1
22
B1
21
A2
20
B2
19
A3
18
B3
17
~G
16
~COUT
15
~P
14
A=B
13
~F3
vcc
gnd
in
out
io
Pin Reference
⌄
#
Label
Type
1
B0
in
2
A0
in
3
S3
in
4
S2
in
5
S1
in
6
S0
in
7
~CIN
in
8
M
in
9
~F0
out
10
~F1
out
11
~F2
out
12
GND
gnd
13
~F3
out
14
A=B
out
15
~P
out
16
~COUT
out
17
~G
out
18
B3
in
19
A3
in
20
B2
in
21
A2
in
22
B1
in
23
A1
in
24
VCC
vcc