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TECHNICAL DATA
KK74HCT27A
Triple 3-Input NOR Gate
The KK74HCT27A is high-speed Si-gate CMOS device and is pin compatible with low power Schottky TTL (LSTTL). The device provide the Triple 3-input NOR function. • Outputs Directly Interface to CMOS, NMOS, and TTL • Operating Voltage Range: 4.5 to 5.5 V • Low Input Current: 1.0 µA • High Noise Immunity Characteristic of CMOS Devices
ORDERING INFORMATION KK74HCT27AN Plastic KK74HCT27AD SOIC TA = -55° to 125° C for all packages
LOGIC DIAGRAM
A1 B1 C1 A2 B2 C2 A3 B3 C3
A
PIN 14 =VCC PIN 7 = GND
PIN ASSIGNMENT
Y1
A1 B1 A2 B2
1 2 3 4 5 6 7
14 13 12 11 10 9 8
V CC
C1 Y1 C3 B3 A3 Y3
Y2
C2 Y2 GND
Y3
FUNCTION TABLE
Inputs
B
L
X
H
X
Output
C
L
H
X
X
Y = A + B + C
L
X
X
H
H
L
L
L
X = don’t care
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KK74HCT27A Datasheet
