This part is a kind of semiconductor called 74HCT7540.

Function of this product has Octal Schmitt trigger buffer/line driver; 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/HCT7540 Octal Schmitt trigger buffer/line driver; 3-state; inverting Product specification Supersedes data of March 1988 File under Integrated Circuits, IC06 December 1990 Philips Semiconductors Product specification Octal Schmitt trigger buffer/line driver; 3-state; inverting FEATURES • Inverting outputs • Schmitt trigger action on all data inputs • Output capability: bus driver • ICC category: MSI GENERAL DESCRIPTION The 74HC/HCT7540 are high-speed Si-gate CMOS devices and are pin compatible with low power Schottky TTL [ ... ]

74HCT7540 PDF Datasheet Download