Datasheet > U4089B-P_05

U4089B-P_05

更新时间： 2024-11-28 06:02:59

品牌	Logo	应用领域
爱特美尔 - ATMEL		手机
页数	文件大小	规格书
26页	636K
描述
Monolithic Integrated Feature Phone Circuit

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数据手册

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U4089B-P_05 数据手册

Features

•

Adjustable DC Characteristic

Transmit and Receive Gain Adjustable

Symmetrical Input of Microphone Amplifier

Anti-clipping in Transmit Direction

Automatic Line-loss Compensation

Built-in Ear Protection

DTMF and MUTE Input

Adjustable Sidetone Suppression Independent of Sending and Receiving Amplification

Integrated Amplifier for Open-listening Operation

Anti-clipping for Loudspeaker Amplifier

Improved Acoustical Feedback Suppression

Selectable Line Impedance

Monolithic

Integrated

Feature Phone

Circuit

Voice Switch

Supply Voltages for All Functional Blocks of a Subscriber Set

Operation Possible from 10-mA Line Current

Filters Against EMI on Critical I/O

U4089B-P

Benefits

•

Complete System Integration of Analog Signal Processing on One Chip

Very Few External Components

Less Components for EMI protection

Applications

•

Feature Phones

Answering Machines

Fax Machines

Speaker Phones

1. Description

The telephone circuit U4089B-P is a linear integrated circuit for use in feature phones,

answering machines and fax machines. It contains the speech circuit, sidetone

equivalent and ear protection rectifiers. The circuit is line-powered and contains all

components necessary for the amplification of signals and adaptation to the line.

An integrated voice switch with loudspeaker amplifier enables open-listening or

hands-free operation. With an anti-feedback function, acoustical feedback during open

listening can be reduced significantly. The generated supply voltage is suitable for a

wide range of peripheral circuits.

Electrostatic sensitive device.

Observe precautions for handling.

Rev. 4518C–CORD–10/05

12 3 4 5 6 7...26

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