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54279
Quad Set-Reset Latch
TL/F/9785
54279/DM74279
Quad
Set-Reset
Latch
June 1989
54279/DM74279 Quad Set-Reset Latch
General Description
This device contains four independent set-reset typeflip-
flops withoneQ output each.
Connection Diagram
Dual-In-Line Package
TL/F/9785–1
Order Number 54279DMQB, 54279FMQBor DM74279N Package NumberJ16A,N16E orW16A
Pin Names Description ResetInputs (ActiveLow) Set Inputs(Active Low) Outputs
Truth Table
Inputs Output
S1S2R Q L h H H H H L L H H No Changee HIGH Voltage Levele LOW Voltage Levele ImmaterialeThe outputis HIGHaslongas S1orS2 isLOW.If allinputsgo HIGH
simultaneously,the outputstateis indeterminate; otherwise,it followsthe
Truth Table.
C1995National SemiconductorCorporation RRD-B30M115/PrintedinU.S.A.
