IN74HC253A Overview
TECHNICAL DATA IN74HC253A Dual 4-Input Data Selector/Multiplexer with 3-State Otputs High-Performance Silicon-Gate CMOS The IN74HC253A is identical in pinout to the LS/ALS253. The device inputs are patible with standard CMOS outputs; with pullup resistors, they are patible with LS/ALSTTL outputs.