View mc74hc151 datasheet:

MOTOROLA SEMICONDUCTOR TECHNICAL DATA MC74HC151 8-Input Data Selector/Multiplexer High–Performance Silicon–Gate CMOS N SUFFIX PLASTIC PACKAGE 16 The MC74HC151 is identical in pinout to the LS151. The device inputs are CASE 648–08 compatible with standard CMOS outputs; with pullup resistors, they are 1 compatible with LSTTL outputs. This device selects one of the eight binary Data Inputs, as determined by the Address Inputs. The Strobe pin must be at a low level for the selected D SUFFIX 16 SOIC PACKAGE data to appear at the outputs. If Strobe is high, the Y output is forced to a low CASE 751B–05 level and the Y output is forced to a high level. 1 The HC151 is similar in function to the HC251 which has 3–state outputs. • Output Drive Capability: 10 LSTTL Loads ORDERING