This part is a kind of semiconductor called 74HC244A.

Function of this product has Octal 3-State Noninverting Buffer/Line Driver/Line Receiver.

Manufacturers : Motorola

Image and pinout :

Some of the text within the PDF file :

MOTOROLA SEMICONDUCTOR TECHNICAL DATA Octal 3-State Noninverting Buffer/Line Driver/ Line Receiver High–Performance Silicon–Gate CMOS The MC54/74HC244A is identical in pinout to the LS244. The device inputs are compatible with standard CMOS outputs; with pullup resistors, they are compatible with LSTTL outputs. This octal noninverting buffer/line driver/line receiver is designed to be used with 3–state memory address drivers, clock drivers, and other bus–oriented systems. The device has noninverting outputs and two active–low output enables. The HC244A is similar in function to the HC240A and HC241A. • • • • • • Output Drive Capability: 15 LSTTL Loads Outputs Directly Interface to CMOS, NMOS, and TTL Operating Voltage Range: 2 to 6 V Low Input C [ ... ]

74HC244A PDF Datasheet Download