DM54LS251 DM74LS251 TRI-STATE Data Selectors Multiplexers June 1989 DM54LS251 DM74LS251 TRI-STATE Data Selectors Multiplexers General Description These data selectors multiplexers contain full on-chip binary decoding to select one-of-eight data sources and feature a strobe-controlled TRI-STATE output The strobe must be at a low logic level to enable these devices The TRI-STATE outputs permit direct connection to a common bus When the strobe input is high both outputs are in a high-impedance state in which both the upper and lower transistors of each totem-pole output are off and the output neither drives nor loads the bus significantly When the strobe is low the outputs are activated and o...

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