HD74LS195A

Rev.3.00, Jul.15.2005, page 2 of 7

Function Table

Inputs

Outputs

Serial

Parallel

Clear

Shift /

Load

Clock

J

K

A

B

C

D

Q

D

L

X

X

X

X

X

X

X

X

L

L

L

L

H

H

L

↑

X

X

a

b

c

d

a

b

c

d

d

H

H

L

X

X

X

X

X

X

Q

D0

H

H

↑

L

H

X

X

X

X

Q

Cn

H

H

↑

L

L

X

X

X

X

L

Q

Cn

H

H

↑

H

H

X

X

X

X

H

Q

Cn

H

H

↑

H

L

X

X

X

X

Q

An

Q

Cn

Notes: 1. H; high level, L; low level, X; irrelevant

2.

↑; transition from low to high level

3. a to d; the level of steady-state input at inputs A, B, C, or D, respectively

established.

↑ transition of the clock.

Block Diagram

parallel Outputs

CK

Clear

S

R

CK

Clear

Parallel Inputs

Serial

Inputs

Shift/Load

Control

Clock

Clear

S

R

CK

Clear

S

R

CK

Clear

S

R

A

K

J

BC

D

Absolute Maximum Ratings

Item

Symbol

Ratings

Unit

Supply voltage

7

V

Input voltage

7

V

Power dissipation

400

mW

Storage temperature

Tstg

–65 to +150

°C

Note:

Voltage value, unless otherwise noted, are with respect to network ground terminal.