74LS257 Datasheet - Fairchild Semiconductor

74LS257, 3-STATE Quad 2-Data Selectors/Multiplexers

DM74LS257B 3-STATE Quad 2-Data Selectors/Multiplexers June 1989 Revised November 1999 DM74LS257B 3-STATE Quad 2-Data Selectors/Multiplexers General .
These Schottky-clamped high-performance multiplexers feature 3-STATE outputs that can interface directly with data lines of bus-organized systems.

Features

* s 3-STATE versions LS157 and LS158 with same pinouts s Schottky-clamped for significant improvement in A-C performance s Provides bus interface from multiple sources in high-performance systems s Average propagation delay from data input 12 ns s Typical power dissipation: 50 mW Ordering Code: Order

74LS257_FairchildSemiconductor.pdf