This part is a kind of semiconductor called 74HCT640.

Function of this product has Octal bus transceiver; 3-state; inverting.

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/HCT640 Octal bus transceiver; 3-state; inverting Product specification File under Integrated Circuits, IC06 March 1988 Philips Semiconductors Product specification Octal bus transceiver; 3-state; inverting FEATURES • Octal bidirectional bus interface • Inverting 3-state outputs • Output capability: bus driver • ICC category: MSI GENERAL DESCRIPTION 74HC/HCT640 The 74HC/HCT640 are high-speed Si-gate CMOS devices and are pin compatible with low power Schottky TTL (LSTTL). They are specified in compliance with JEDEC standa [ ... ]

74HCT640 PDF Datasheet Download