These devices contain four independent 2-input positive-NAND
gates. They perform the Boolean functions or Y = A\ + B\ in positive logic.
The SN54ALS00A and SN54AS00 are characterized for operation over
the full military temperature range of -55°C to 125°C. The
SN74ALS00A and SN74AS00 are characterized for operation from 0°C
to 70°C.