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TECHNICAL DATA
KK74HC21A
Dual 4-Input AND Gate
The KK74HC21A is high-speed Si-gate CMOS device and is pin compatible with pullup resistors with low power Schottky TTL (LSTTL). The device provide the Dual 4-input AND 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 KK74HC21AN Plastic KK74HC21AD SOIC TA = -55° to 125° C for all packages
LOGIC DIAGRAM PIN ASSIGNMENT
A1
B1 Y1
A1 B1
C1 D1
1 2 3 4 5 6 7
14 13 12 11 10 9 8
V CC
D2 C2
C1
B2 A2 Y2
A2 B2 Y2 C2 D2
Y1 GND
FUNCTION TABLE
Inputs
A
L
X
X
X
H
X = don’t care
Output
С
X
X
L
X
H
B
X
L
X
X
H
D
X
X
X
L
H
Y
L
L
L
L
H
PIN 14 =VCC PIN 7 = GND
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KK74HC21A Datasheet
