MM74C922 • MM74C923
Connection Diagrams
(Continued)
Pin Assignment for
DIP and SOIC Package
Top View
MM74C923
Truth Tables
(Pins 0 through 11)
Switch
Position
D
A
T
A
O
U
T
(Pins 12 through 19)
Switch
Position
D
A
T
A
O
U
T
Note 1:
Omit for MM74C922
0
1
2
3
4
5
6
7
8
9
10
11
Y1,X1 Y1,X2 Y1,X3 Y1,X4 Y2,X1 Y2,X2 Y2,X3 Y2,X4 Y3,X1 Y3,X2 Y3,X3 Y3,X4
0
0
0
0
0
1
0
0
0
0
0
1
0
0
0
1
1
0
0
0
0
0
1
0
0
1
0
1
0
0
0
1
1
0
0
1
1
1
0
0
0
0
0
1
0
1
0
0
1
0
0
1
0
1
0
1
1
0
1
0
A
B
C
D
E (Note 1)
12
Y4,X1
13
Y4,X2
14
Y4,X3
15
Y4,X4
16
17
18
19
Y5(Note 1), Y5 (Note 1), Y5 (Note 1), Y5 (Note 1),
X1
X2
X3
X4
0
0
0
0
1
1
0
0
0
1
0
1
0
0
1
1
1
0
0
1
A
B
C
D
E (Note 1)
0
0
1
1
0
1
0
1
1
0
0
1
1
1
0
1
1
1
1
0
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