mm74c923wmx-nl Fairchild Semiconductor, mm74c923wmx-nl Datasheet - Page 2

• Manufacturer Part Number: mm74c923wmx-nl
• Description: Mm74c922 * Mm74c923 16-key Encoder * 20-key Encoder
• Manufacturer: Fairchild Semiconductor

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