HCS74MS

FN2142 Rev 2.00

Page 2 of 9

September 1995

Functional Diagram

4(10)

P

N

2(12)

CL

CL

P

N

CL

CL

3(11)

P

N

CL

CL

P

N

CL

CL

CL

CL

6(8)

5(9)

Q

Q

S

D

R

1(13)

CP

TRUTH TABLE

INPUTS

OUTPUTS

SET

RESET

CP

D

Q

Q

LH

X

X

HL

HL

X

X

LH

L

L

X

X

H*

H*

HH

HH

L

HH

L

L

H

H

H

L

X

Q0

Q0

NOTE: L = Logic Level Low, H = Logic Level High, X = Don’t Care

= Transition from Low to High Level

Q0 = The level of Q before the indicated input conditions were established.

* This configuration is non-stable, that is, it will not persist when set and reset inputs return to their inactive (High) level.