2
Functional Diagram
Logic Symbol
TRUTH TABLE
INPUTS OUTPUT
nA nB nC nY
LLLH
LLHL
LHLL
HLLL
HHL L
LHHL
HLHL
HHHL
H = High Voltage Level, L = Low Voltage Level
1A
1B
2B
2C
2Y
GND
1
2
3
4
5
6
14
13
12
11
V
CC
3C
3Y
3B
1Y
1C
10
8
7
9
3A
2A
nA
nB
nY
nC
CD54HC27, CD74HC27, CD54HCT27, CD74HCT27
