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DM74LS55N
2-Wide, 4-Input AND-OR-INVERT Gate
TL/F/10174
DM54LS55/DM74LS55
2-Wide,
4-Input
AND-OR-INVERT
Gate
April 1992
DM54LS55/DM74LS55
2-Wide, 4-Input AND-OR-INVERT Gate
General Description
This device containsa combinationof AND-OR-INVERT
functions. The internal gates are configuredas two,
four-input AND gates with their outputs connectedtoa
two-input NOR gate.
Connection Diagram
Dual-In-Line Package
TL/F/10174–1
Order Number DM54LS55J, DM54LS55W, DM74LS55Mor DM74LS55N
SeeNS Package Number J14A,M14A, N14Aor W14B
Function Tablee ABCDa EFGH
Inputs Output
ABCD E F G H Y
HHHH X X X X L
XXXX H H H H L
All OtherCombinations HeHigh Logic LeveleLow Logic Levele EitherLow orHighLogicLevel
C1995National SemiconductorCorporation RRD-B30M105/PrintedinU.S.A.
