DM74S257 selector/multiplexer equivalent, 3-state quad 1-of-2 data selector/multiplexer.
s 3-STATE versions S157, S158, with same pin-outs s Schottky-clamped for significant improvement in A-C performance s Provides bus interface from multiple sources in high.
These Schottky-clamped high-performance multiplexers feature 3-STATE outputs that can interface directly with data lines of bus-organized systems. With all but one of the common outputs disabled (at a high impedance state), the low impedance of the s.
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