R04DS0012EJ0400 Rev.4.00

Page 1 of 7

Dec 21, 2011

HD74LS74A

Dual D-type Positive Edge-triggered Flip-Flops

(with Preset and Clear)

Features

 Ordering Information

Part Name

Package Type

Package Code

(Previous Code)

Package

Abbreviation

Taping Abbreviation

(Quantity)

HD74LS74AP

DILP-14 pin

PRDP0014AB-B

(DP-14AV)

P

—

HD74LS74AFPEL

SOP-14 pin (JEITA)

PRSP0014DF-B

(FP-14DAV)

FP

EL (2,000 pcs/reel)

HD74LS74ARPEL

SOP-14 pin (JEDEC)

PRSP0014DE-A

(FP-14DNV)

RP

EL (2,500 pcs/reel)

Note:

Please consult the sales office for the above package availability.

Pin Arrangement

(Top view)

2CLR

2D

2CK

2Q

2PR

1CLR

GND

1D

1CK

1PR

1Q

1

Q

2

Q

1

2

3

4

5

6

7

14

8

9

10

11

12

13

PR

CK

D

CLR

Q

Q

D

CK

PR

Q

Q

CLR

Function Table

Input

Output

Preset

Clear

Clock

D

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

Q

0

H; high level, L; low level, X; irrelevant,

; transition from low to high level,

Q

*;This configuration is nonstable, that is, it will not persist when preset and clear inputs return to their inactive (high) level.

R04DS0012EJ0400

(Previous: REJ03D0415-0300)

Rev.4.00

Dec 21, 2011