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TECHNICAL DATA
IN74HCT21A
Dual 4-Input AND Gate
The IN74HCT21A is high-speed Si-gate CMOS device and is pin compatible 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: 4.5 to 5.5 V • Low Input Current: 1.0 µA • High Noise Immunity Characteristic of CMOS Devices
ORDERING INFORMATION IN74HCT21AN Plastic IN74HCT21AD SOIC TA = -55° to 125° C for all packages
LOGIC DIAGRAM PIN ASSIGNMENT
A1 B1 Y1 C1
C1 D1 A1 B1
1 2 3 4 5 6 7
14 13 12 11 10 9 8
V CC
D2 C2
B2 A2 Y2
GND
B2 Y2 C2 D2
FUNCTION TABLE
Inputs A B X L X X H С X X L X H D X X X L H Output Y L L L L H
PIN 14 =VCC PIN 7 = GND
L X X X H X = don’t care
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IN74HCT21A Datasheet
