This part is a kind of semiconductor called 74HC7403.

Function of this product has 4-Bit x 64-word FIFO register 3-state.

Manufacturers : Philips

Image and pinout :

Some of the text within the PDF file :

INTEGRATED CIRCUITS DATA SHEET For a complete data sheet, please also download: • The IC06 74HC/HCT/HCU/HCMOS Logic Family Specifications • The IC06 74HC/HCT/HCU/HCMOS Logic Package Information • The IC06 74HC/HCT/HCU/HCMOS Logic Package Outlines 74HC/HCT7403 4-Bit x 64-word FIFO register; 3-state Product specification Supersedes data of October 1990 File under Integrated Circuits, IC06 September 1993 Philips Semiconductors Product specification 4-Bit x 64-word FIFO register; 3-state FEATURES • Synchronous or asynchronous operation • 3-state outputs • 30 MHz (typical) shift-in and shift-out rates • Readily expandable in word and bit dimensions • Pinning arranged for easy board layout: input pins directly opposite output pins • Output capability: driver (8 mA) • I [ ... ]

74HC7403 PDF Datasheet Download