NXP Semiconductors TEA1085
The TEA1085 and TEA1085A are bipolar ICs which have been designed for use in line-powered telephone sets and provide a listening-in facility for the received line signal via a loudspeaker. The circuits incorporate a supply circuit, loudspeaker amplifier dynamic limiter, MUTE circuit, power-down facility and logic inputs for gain setting. The devices also incorporate a Larsen Level Limiter to reduce howling effects.| Part No. | TEA1085 |
|---|---|
| Datasheet | TEA1085 Download |
| Manufacturer |  NXP Semiconductors |
| Description | Line-powered Telephone Listening-in |
| Buy | Stock & Price |
FEATURES
● Internal supply optimum current split-up - low constant current (adjustable) in transmission IC - nearly all line current available for listening-in adjustable supply voltage● Loudspeaker amplifier dynamic limiter providing low distortion and the highest possible output power SE or BTL drive for loudspeaker volume control by potentiometer and/or logic inputs (e.g. microcontroller drive) fixed gain of 35 dB
● Larsen level limiter low sensitivity for own speech due to 3rd-order filter and attack delay adjustable voltage thresholds
● Power down input
● MUTE input TEA1085/TEA1085A - clickfree switching between listening-in mode and standby mode TEA1085 - toggle function - start-up in standby condition TEA1085A - logic level input ORDERING INFORMATION EXTENDED TYPE NUMBER TEA1085/TEA1085A TEA1085T/TEA1085AT Notes 1. SOT101-1; 1998 Jun 18. 2. SOT137-1; 1998 Jun 18. PACKAGE PINS 24 24 PIN POSITION DIL SO24 TEA1085; TEA1085A
GENERAL DESCRIPTION
Nearly all the line current can be used for powering the loudspeaker.
