2
Functional Diagram
Logic Symbol
TRUTH TABLE
INPUTS
OUTPUTABCDEFGH
LXXXXXXX H
XLXXXXXX H
XXLXXXXX H
XXXLXXXX H
XXXXLXXX H
XXXXXLXX H
XXXXXXLX H
XXXXXXXL H
HHHHHHHH L
NOTE: H = HIGH Voltage Level, L = LOW Voltage Level, X = Irrelevant
1
2
3
4
5
6
11
12
A
B
C
D
E
F
G
H
8
Y
Y =
ABCDEFGH
8
Y
A
B
C
D
E
F
G
H
1
2
3
4
5
6
11
12
CD54/74HC30, CD54/74HCT30
