This part is a kind of semiconductor called HC244.

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

Manufacturers : System Logic Semiconductor

Image and pinout :

Some of the text within the PDF file :

SL74HC244 Octal 3-State Noninverting Buffer/Line Driver/Line Receiver High-Performance Silicon-Gate CMOS The SL74HC244 is identical in pinout to the LS/ALS244. The device inputs are compatible with standard CMOS outputs; with pullup resistors, they are compatible with LS/ALSTTL 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. • Outputs Directly Interface to CMOS, NMOS, and TTL • Operating Voltage Range: 2.0 to 6.0 V • Low Input Current: 1.0 µA • High Noise Immunity Characteristic of CMOS Devices ORDERING INFORMATION SL74HC244N Plastic SL74HC244D SOIC TA = -55° to 125° C for all package [ ... ]

HC244 PDF Datasheet Download