View mc74hc244a datasheet:

MOTOROLA SEMICONDUCTOR TECHNICAL DATA MC54/74HC244A Octal 3-State Noninverting Buffer/Line Driver/ J SUFFIX Line Receiver CERAMIC PACKAGE 20 CASE 732–03 High–Performance Silicon–Gate CMOS 1 The MC54/74HC244A is identical in pinout to the LS244. The device N SUFFIX inputs are compatible with standard CMOS outputs; with pullup resistors, PLASTIC PACKAGE they are compatible with LSTTL outputs. 20 CASE 738–03 This octal noninverting buffer/line driver/line receiver is designed to be 1 used with 3–state memory address drivers, clock drivers, and other DW SUFFIX bus–oriented systems. The device has noninverting outputs and two 20 SOIC PACKAGE active–low output enables. 1 CASE 751D–04 The HC244A is similar in function to the HC240A and HC241A. SD SUFFIX • Output Dri