TEA1067

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 adjustable static resistance Provides supply with limited current for external circuitry Symmetrical high-impedance inputs (64 kΩ) for dynamic, magnetic or piezoelectric microphones QUICK REFERENCE DATA PARAMETER Line voltage Line current operating range CONDITIONS Iline = 15 mA normal operation TEA1067 TEA1067T with reduced performance Internal supply current power down input LOW input HIGH Supply voltage for peripherals Iline = 15 mA; Ip = 1.4 mA; mute input HIGH Iline = 15 mA; Ip = 0.9 mA; mute input HIGH Voltage gain range microphone amplifier receiving amplifier Line loss compensation gain control range Exchange supply voltage range Exchange feeding bridge resistance range PACKAGE OUTLINES TEA...