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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 TA = -55° to 125° C for all packages
LOGIC DIAGRAM PIN ASSIGNMENT
A1 B1 C1 A2 B2 C2 A3 B3 C3 Y3
A
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
GND
FUNCTION TABLE
Inputs B
L X H X
Output C
L H X X
Y = A + B + C
PIN 14 =VCC PIN 7 = GND
w w
w
a t a d .
e h s
4 t e
c . u
om
L X X H
H L L L
X = don’t care
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IN74HC27A Datasheet
