This part is a kind of semiconductor called HEF4528B.

Function of this product has Dual monostable multivibrator.

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 IC04 LOCMOS HE4000B Logic Family Specifications HEF, HEC • The IC04 LOCMOS HE4000B Logic Package Outlines/Information HEF, HEC HEF4528B MSI Dual monostable multivibrator Product specification File under Integrated Circuits, IC04 January 1995 Philips Semiconductors Dual monostable multivibrator Product specification HEF4528B MSI DESCRIPTION The HEF4528B is a dual retriggerable-resettable monostable multivibrator. Each multivibrator has an active LOW input (I0), and active HIGH input (I1), an active LOW clear direct input (CD), an output (O) and its complement (O), and two pins for connecting the external timing components (CTC(1), RCTC). An external timing capacitor (Ct ) must be connected betw [ ... ]

HEF4528B PDF Datasheet Download