Datasheet

December 1990 3
Philips Semiconductors Product specification
Triple 3-input NOR gate 74HC/HCT27
PIN DESCRIPTION
PIN NO. SYMBOL NAME AND FUNCTION
1, 3, 9 1A to 3A data inputs
2, 4, 10 1B to 3B data inputs
13, 5, 11 1C to 3C data inputs
7 GND ground (0 V)
12, 6, 8 1Y to 3Y data outputs
14 V
CC
positive supply voltage
Fig.1 Pin configuration. Fig.2 Logic symbol. Fig.3 IEC logic symbol.
Fig.4 Functional diagram. Fig.5 Logic diagram (one gate).
FUNCTION TABLE
Notes
1. H = HIGH voltage level
L = LOW voltage level
X = don’t care
INPUTS OUTPUT
nA nB nC nY
L
X
X
H
L
X
H
X
L
H
X
X
H
L
L
L