AND-OR-INVERT logic in a single package
The Texas Instruments SN74S64D is an AND-OR-INVERT gate, a logic function that combines multiple AND terms into a single OR-NOT output. It belongs to the 74S Schottky family, which trades higher supply current for propagation delays roughly half those of the standard 74LS series — a meaningful edge in timing-critical paths where the extra 10-15 ns of gate delay would push the data setup window past the clock edge.