SL74HC258 Overview
SL74HC258 Quad 2-Input Data Selectors/Multiplexer with 3-State Outputs High-Performance Silicon-Gate CMOS The SL74HC258 is identical in pinout to the LS/ALS258. The device inputs are patible with standard CMOS outputs; with pullup resistors, they are patible with LS/ALSTTL outputs.