© Semiconductor Components Industries, LLC, 2014

September, 2014 − Rev. 12

1

Publication Order Number:

MC74HCT374A/D

MC74HCT374A

Octal 3-State Noninverting

D Flip-Flop with

LSTTL-Compatible Inputs

High−Performance Silicon−Gate CMOS

The MC74HCT374A may be used as a level converter for

interfacing TTL or NMOS outputs to High−Speed CMOS inputs.

The HCT374A is identical in pinout to the LS374.

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

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

the flip−flops, but when Output Enable is high, the outputs are forced

to the high−impedance state. Thus, data may be stored even when the

outputs are not enabled.

The HCT374A is identical in function to the HCT574A, which has

the input pins on the opposite side of the package from the output pins.

This device is similar in function to the HCT534A, which has

inverting outputs.

Features

LOGIC DIAGRAM

DATA

INPUTS

D0

11

CLOCK

D1

D2

D3

D4

D5

D6

D7

18

17

14

13

8

7

4

3

1

OUTPUT ENABLE

19

Q0

Q1

Q2

Q3

Q4

Q5

Q6

Q7

16

15

12

9

6

5

2

PIN 10 = GND

NONINVERTING

OUTPUTS

http://onsemi.com

MARKING DIAGRAMS

HCT

374A

ALYW

G

G

See detailed ordering and shipping information on page 5 of

this data sheet.

ORDERING INFORMATION

20

1

HCT374A

AWLYYWWG

20

1

SOIC−20

TSSOP−20

A

= Assembly Location

WL, L

= Wafer Lot

YY, Y

= Year

WW, W

= Work Week

G or

G

= Pb−Free Package

(Note: Microdot may be in either location)

SOIC−20

DW SUFFIX

CASE 751D

TSSOP−20

DT SUFFIX

CASE 948E

PIN ASSIGNMENT

Q2

D1

D0

Q0

OUTPUT ENABLE

GND

Q3

D3

D2

Q1

5

4

3

2

1

10

9

8

7

6

14

15

16

17

18

19

20

11

12

13

Q6

D6

D7

Q7

CLOCK

Q4

D4

D5

Q5

FUNCTION TABLE

Inputs

Output

Output

Enable

Clock

D

Q

LH

H

LL

L

L

L,H,

X

No Change

HX

X

Z

X = don’t care

Z = high impedance