View mc74hc253 datasheet:

MOTOROLA SEMICONDUCTOR TECHNICAL DATA MC74HC253 Dual 4-Input Data Selector/ Multiplexer with N SUFFIX 3-State Outputs PLASTIC PACKAGE 16 High–Performance Silicon–Gate CMOS CASE 648–08 1 The MC74HC253 is identical in pinout to the LS253. The device inputs are compatible with standard CMOS outputs; with pullup resistors, they are compatible with LSTTL outputs. D SUFFIX The Address inputs select one of four Data inputs from each multiplexer. 16 SOIC PACKAGE Each multiplexer has an active–low Output Enable control and a three–state CASE 751B–05 1 noninverting output. The HC253 is similar in function to the HC153 which does not have ORDERING INFORMATION three–state outputs. MC74HCXXXN Plastic • Output Drive Capability: 10 LSTTL Loads MC74HCXXXD SOIC • Outputs Directly