DM74279 Datasheet, PDF (1/4 Pages) National Semiconductor (TI) – Quad Set-Reset Latch

54279 DM74279 Quad Set-Reset Latch
General Description
This device contains four independent set-reset type flip-
flops with one Q output each
Connection Diagram
Dual-In-Line Package
June 1989
TL F 9785 – 1
Order Number 54279DMQB 54279FMQB or DM74279N
NS Package Number J16A N16E or W16A
Pin Names
R_n
S_n
Q
Description
Reset Inputs (Active Low)
Set Inputs (Active Low)
Outputs
Truth Table
Inputs
S1
S2
R
Output
Q
L
L
L
h
L
X
H
H
X
L
H
H
H
H
L
L
H
H
H
No Change
H e HIGH Voltage Level
L e LOW Voltage Level
X e Immaterial
h e The output is HIGH as long as S1 or S2 is LOW If all inputs go HIGH
simultaneously the output state is indeterminate otherwise it follows the
Truth Table
C1995 National Semiconductor Corporation TL F 9785
RRD-B30M115 Printed in U S A