This device contains four independent set-reset type flipflops with one Q output each
Connection Diagram
Dual-In-Line Package
TL F 9785
1
Order Number 54279DMQB 54279FMQB or DM74279N NS Package Number J16A N16E or W16A
Pin Names Rn Sn Q
Description Reset Inputs (Active Low) Set Inputs
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54279 DM74279 Quad Set-Reset Latch
June 1989
54279 DM74279 Quad Set-Reset Latch
General Description
This device contains four independent set-reset type flipflops with one Q output each
Connection Diagram
Dual-In-Line Package
TL F 9785 – 1
Order Number 54279DMQB 54279FMQB or DM74279N NS Package Number J16A N16E or W16A
Pin Names Rn Sn Q
Description Reset Inputs (Active Low) Set Inputs (Active Low) Outputs
Truth Table
S1 L L X H H Inputs S2 L X L H H R L H H L H Output Q h H H L 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
54279 Datasheet
