This part is a kind of semiconductor called 74HC126.
Function of this product has QUADRUPLE 3-STATE BUFFERS OE HIGH.
Manufacturers : Diodes
Image and pinout :

Some of the text within the PDF file :
74HC126 QUADRUPLE 3-STATE BUFFERS OE HIGH Description The 74HC126 provides provides four independent buffer gates with 3-state outputs. Each buffer has a separate enable pin that if driven with a low logic level places the corresponding output in the high impedance state. The device is designed for operation with a power supply range of 2.0V to 6.0V. Pin Assignments Features • Wide Supply Voltage Range from 2.0V to 6.0V • Sinks or sources 4mA at VCC = 4.5V • CMOS low power consumption • Schmitt Trigger Action at All Inputs • ESD Protection Exceeds JESD 22 200-V Machine Model (A115-A) 2000-V Human Body Model (A114-A) Exceeds 1000-V Charged Device Model (C101C) • Range of Package Options SO-14 and TSSOP-14 • Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) �� [ ... ]
74HC126 PDF Datasheet Download
