This part is a kind of semiconductor called TEA1067T.

Function of this product has Low voltage versatile telephone transmission circuit with dialler interface.

Manufacturers : NXP

Image and pinout :

Some of the text within the PDF file :

INTEGRATED CIRCUITS DATA SHEET TEA1067 Low voltage versatile telephone transmission circuit with dialler interface Product specification File under Integrated Circuits, IC03A June 1990 Philips Semiconductors Product specification Low voltage versatile telephone transmission circuit with dialler interface GENERAL DESCRIPTION The TEA1067 is a bipolar integrated circuit performing all speech and line interface functions required in fully electronic telephone sets. It performs electronic switching between dialling and speech. The circuit is able to operate down to a DC line voltage of 1.6 V (with reduced performance) to facilitate the use of more telephone sets in parallel. Features • Low DC line voltage; operates down to 1.6 V (excluding polarity guard) • Voltage regulator with adj [ ... ]

TEA1067T PDF Datasheet Download