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DM74S257 3-STATE Quad 1-of-2 Data Selector/Multiplexer
August 1986 Revised May 2000
DM74S257 3-STATE Quad 1-of-2 Data Selector/Multiplexer
General Description
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 single enabled output will drive the bus line to a HIGH or LOW logic level. To minimize the possibility that two outputs will attempt to take a common bus to opposite logic levels, the output enable circuitry is designed such that the output disable times are shorter than the output enable times.
DM74S257 Datasheet
