TEA1067T Datasheet | NXP Semiconductors

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 m A normal operation TEA1067 TEA1067T with reduced performance Internal supply current power down input LOW input HIGH Supply voltage for peripherals Iline = 15 m A; Ip = 1.4 m A; mute input HIGH Iline = 15 m A; Ip = 0.9 m A; mute input HIGH Voltage gain range microphone amplifier receiving amplifier Line loss pensation gain control range Exchange supply voltage range Exchange feeding bridge resistance range PACKAGE OUTLINES TEA1067: 18-lead DIL; plastic (SOT102). SOT102-1; 1998 Jun 18. TEA1067T: 20-lead mini-pack; plastic (SO20; SOT163A). SOT163-1; 1998 Jun 18. June 1990 2 Rexch 0.4 - ∆Gv Vexch 5.5 36 5.9 - Gv Gv 44 20 - - VCC 2.5 - VCC 2.2 2.4 ICC ICC - - 1 55 Iline Iline Iline 11 11 1 - - - SYMBOL VLN MIN. 3.65 TYP. 3.9 TEA1067 - Asymmetrical high-impedance input (32 kΩ) for electret microphone - DTMF signal input with confidence tone - Mute input for pulse or DTMF dialling - Power down input for pulse dial or register recall - Receiving amplifier for magnetic, dynamic or piezoelectric earpieces - Large gain setting range on microphone and earpiece amplifiers - Line current dependent line loss pensation facility for microphone and earpiece amplifiers - Gain control adaptable to exchange supply - DC line voltage adjustment...