IN74ACT74

1

High-Speed Silicon-Gate CMOS

The IN74ACT74 is identical in pinout to the LS/ALS74,

HC/HCT74. The IN74ACT74 may be used as a level converter

for interfacing TTL or NMOS outputs to High Speed CMOS

inputs.

This device consists of two D flip-flops with individual Set,

Reset, and Clock inputs. Information at a D-input is transferred to

the corresponding Q output on the next positive going edge of

the clock input. Both Q and Q outputs are available from each

flip-flop. The Set and Reset inputs are asynchronous.

• 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; 0.1 µA @ 25°C

• Outputs Source/Sink 24 mA

ORDERING INFORMATION

IN74ACT74N Plastic

IN74ACT74D SOIC

packages

LOGIC DIAGRAM

PIN 7 = GND

PIN ASSIGNMENT

FUNCTION TABLE

Inputs

Outputs

Set

Rese

t

Clock

Data

Q

Q

L

H

X

X

H

L

H

L

X

X

L

H

L

L

X

X

H

*

H

*

H

H

H

H

L

H

H

L

L

H

H

H

L

X

No Change

H

H

H

X

No Change

H

H

X

No Change

*Both outputs will remain high as long as Set

and Reset are low, but the output states are

unpredictable if Set and Reset go high

simultaneously.

X = don’t care