This part is a kind of semiconductor called 74LVC244A.
Function of this product has Octal buffer/line driver.
Manufacturers : Philips
Image and pinout :

Some of the text within the PDF file :
INTEGRATED CIRCUITS 74LVC244A/74LVCH244A Octal buffer/line driver with 5-volt tolerant inputs/outputs (3-State)title Product specification Supersedes data of 1996 Sep 06 IC24 Data Handbook 1998 May 20 Philips Semiconductors Philips Semiconductors Octal buffer/line driver with 5-volt tolerant inputs/outputs (3-State) Product specification 74LVC244A 74LVCH244A FEATURES • 5-volt tolerant inputs/outputs, for interfacing with 5-volt logic • Supply voltage range of 2.7V to 3.6V • Complies with JEDEC standard no. 8-1A • CMOS low power consumption • Direct interface with TTL levels • High impedance when VCC = 0V • Bushold on all data inputs (74LVCH244A only) DESCRIPTION The 74LVC244A/74LVCH244A is a high-performance, low-power, low-voltage, Si-gate CMOS device, superior to mo [ ... ]
74LVC244A PDF Datasheet Download
