CD74HC27 Datasheet, PDF (2/7 Pages) Texas Instruments – High Speed CMOS Logic Triple 3-Input NOR Gate

Functional Diagram
CD74HC27, CD74HCT27
1
1A
2
1B
3
2A
4
2B
5
2C
6
2Y
7
GND
14
V_CC
13
1C
12
1Y
11
3C
10
3B
9
3A
8
3Y
Logic Symbol
TRUTH TABLE
INPUTS
OUTPUT
nA
nB
nC
nY
L
L
L
H
L
L
H
L
L
H
L
L
H
L
L
L
H
H
L
L
L
H
H
L
H
L
H
L
H
H
H
L
NOTE: H = High Voltage Level, L = Low Voltage Level
nA
nB
nY
nC
2