TECHNICAL DATA
IN74HC27A
Triple 3-Input NOR Gate
The IN74HC27A is high-speed Si-gate CMOS device and are pin
compatible with low power Schottky TTL (LSTTL) . The device provide
Triple 3-input NOR function.
•
Outputs Directly Interface to CMOS, NMOS, and TTL
•
Operating Voltage Range: 2.0 to 6.0 V
•
Low Input Current: 1.0
µA
•
High Noise Immunity Characteristic of CMOS Devices
ORDERING INFORMATION
IN74HC27AN
Plastic
IN74HC27AD
SOIC
T
A
= -55° to 125° C for all packages
LOGIC DIAGRAM
PIN ASSIGNMENT
A1
B1
C1
A2
B2
C2
A3
B3
C3
Y3
A
L
X
X
H
Y1
A1
B1
A2
B2
C2
1
2
3
4
5
6
7
14
13
12
11
10
9
8
V CC
C1
Y1
C3
B3
A3
Y3
Y2
Y2
GND
FUNCTION TABLE
Inputs
B
L
X
H
X
Output
C
L
H
X
X
Y
=
A
+
B
+
C
H
L
L
L
PIN 14 =V
CC
PIN 7 = GND
X = don’t care
1
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