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SL74HCT574

Octal 3-State Noninverting D Flip-Flop High-Performance Silicon-Gate CMOS

System Logic Semiconductor 

SL74HCT574

Octal 3-State Noninverting D Flip-Flop

High-Performance Silicon-Gate CMOS

The SL74HCT574 is identical in pinout to the LS/ALS574. This

device may be used as a level converter for interfacing TTL or NMOS

outputs to High-Speed CMOS inputs.

Data meeting the setup time is clocked to the outputs with the

rising edge of the Clock. The Output Enable input does not affect the

states of the flip-flops, but when Output Enable is high, all device

outputs are forced to the high-impedance state; thus, data may be

stored even when the outputs are not enabled.

• TTL/NMOS Compatible Input Levels

• Outputs Directly Interface to CMOS, NMOS, and TTL

• Operating Voltage Range: 4.5 to 5.5 V

• Low Input Current: 1.0 µA

ORDERING INFORMATION

SL74HCT574N Plastic

SL74HCT574D SOIC

TA = -55° to 125° C for all packages

LOGIC DIAGRAM

PIN ASSIGNMENT

PIN 20=VCC

PIN 10 = GND

FUNCTION TABLE

Output

Enable

L

L

L

Inputs

Clock

L,H,

H

X

X = don’t care

Z = high impedance

Output

D

Q

H

H

L

L

X

no

change

X

Z

SLS

System Logic

Semiconductor

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