SL74HC257 Datasheet (System Logic Semiconductor) - Quad 2-Input Data Selector/Multiplexer with 3-State Outputs

SL74HC257, Quad 2-Input Data Selector/Multiplexer with 3-State Outputs

SL74HC257 Quad 2-Input Data Selector/Multiplexer with 3-State Outputs High-Performance Silicon-Gate CMOS The SL74HC257 is identical in pinout to the LS/ALS257.

The device inputs are compatible with standard CMOS outputs; with pullup resistors, they are compatible with LS/ALSTTL outputs.

This device selects a (4-bit) nibble from either the A or B inputs as determined by the Select input.

The nibble is presented at the outputs in noninverted from when the Output Enable pin is at a low level.

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