These devices contain three independent 3-input positive-NOR gates. They perform the Boolean functions Y = A
* B
* C or Y = A + B + C in positive logic. The SN54ALS27A and SN54AS27 are characterized for operation over the full military temper.

SN74AS20

SN74AS21

SN74AS240A

SN74AS241A

SN74AS244A

SN74AS245

SN74AS253A

SN74AS257

SN74AS258

SN74AS286

SN74AS298A

SN74AS00

SN74AS02

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