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SL74HC373

Octal 3-State Noninverting Transparent Latch

System Logic Semiconductor 

SL74HC373

Octal 3-State Noninverting Transparent Latch

High-Performance Silicon-Gate CMOS

The SL74HC373 is identical in pinout to the LS/ALS373. The device

inputs are compatible with standard CMOS outputs; with pullup

resistors, they are compatible with LS/ALSTTL outputs.

These latches appear transparent to data (i.e., the outputs change

asynchronously) when Latch Enable is high. When Latch Enable goes

low, data meeting the setup and hold time becomes latched.

The Output Enable input does not affect the state of the latches,

but when Output Enable is high, all device outputs are forced to the

high-impedance state. Thus, data may be latched even when the

outputs are not enabled.

• 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

SL74HC373N Plastic

SL74HC373D SOIC

TA = -55° to 125° C for all packages

PIN ASSIGNMENT

LOGIC DIAGRAM

PIN 20=VCC

PIN 10 = GND

FUNCTION TABLE

Inputs

Output Latch

D

Enable Enable

L

H

H

L

H

L

L

L

X

H

X

X

X = Don’t Care

Z = High Impedance

Output

Q

H

L

No Change

Z

SLS

System Logic

Semiconductor

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