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DC Characteristic Adjustable

Transmit and Receive Gain Adjustable

Symmetrical Input of Microphone Amplifier

Anti-clipping in Transmit Direction

Automatic Line-loss Compensation

Symmetrical Output of Earpiece Amplifier

Built-in Ear Protection

DTMF and MUTE Input

Adjustable Sidetone Suppression Independent of Sending

and Receiving Amplification

Speech Circuit with Two Sidetone Networks

Built-in Line Detection Circuit

Integrated Amplifier for Loud-hearing Operation

Anti-clipping for Loudspeaker Amplifier

Improved Acoustical Feedback Suppression

Power Down

Voice Switch

Tone Ringer Interface with DC/DC Converter

Zero Crossing Detection

Common Speaker for Loud-hearing and Tone Ringer

Supply Voltages for all Functional Blocks of a Subscriber Set

Integrated Transistor for Short-circuiting the Line Voltage

Answering Machine Interface

Operation Possible from 10 mA Line Currents

Filters against EMI on Critical I/O

Monolithic

Integrated

Feature Phone

Circuit EMI

Improved

U4090B-P

Applications

鈥?/div>

Feature Phone

Answering Machine

Fax Machine

Speaker Phone

Benefits

鈥?/div>

Savings of One Piezoelectric Transducer

Complete System Integration of Analog Signal Processing on One Chip

Very Few External Components

Fewer Components for EMI Protection

Description

The microcontroller-controlled telephone circuit U4090B-P is a linear integrated circuit

for use in feature phones, answering machines and fax machines. It contains the

speech circuit, tone ringer interface with DC/DC converter, sidetone equivalent and

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

essary for amplification of signals and adaptation to the line.

An integrated voice switch with loudspeaker amplifier allows loud-hearing or hands-

free operation. With an anti-feedback function, acoustical feedback during loud-hear-

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

range of peripheral circuits.

Rev. 4741A鈥揅ORD鈥?9/03

型號(hào)

版本

描述

廠商

下載
U4090B

英文版

Monolithic Integrated Feature Phone Circuit

TEMIC

U4090B
U4090B

英文版

Monolithic Integrated Feature Phone Circuit

ATMEL [ATM...

U4090B
U4090B

英文版

Monolithic Integrated Feature Phone Circuit

TEMIC [TEM...

U4090B
U4091B

英文版

Programmable Telephone Audio Processor

TEMIC [TEM...

U4091B
U4092B

英文版

Monolithic Integrated Feature Phone Circuit

TEMIC

U4092B
U4092B

英文版

Monolithic Integrated Feature Phone Circuit

U4092B
U4091BM

英文版

Programmable Telephone Audio Processor

TEMIC

U4091BM
U4091BM

英文版

Programmable Telephone Audio Processor

TEMIC [TEM...

U4091BM
U4090B-N

英文版

U4090B-N [Updated 9/03. 34 Pages]

ETC

U4090B-N
U4090B-P

英文版

U4090B-P [Updated 9/03. 34 Pages]

ETC

U4090B-P
U4090B-P

英文版

Multi-standard feature phone circuit with voice switch

U4090B-P
U4090B-FN

英文版

Monolithic Integrated Feature Phone Circuit

TEMIC

U4090B-FN
U4090B-FN

英文版

Monolithic Integrated Feature Phone Circuit

TEMIC [TEM...

U4090B-FN
U4090B-FN

英文版

Monolithic Integrated Feature Phone Circuit

ATMEL [ATM...

U4090B-FN
U4091BM-N

英文版

U4091BM-N [Updated 2/03. 38 Pages] Multi-standard feature ph...

ETC

U4091BM-N
U4091BM-N

英文版

PROGRAMMABLE TELEPHONE AUDIO PROCESSOR

ATMEL [ATM...

U4091BM-N
U4091BM-R

英文版

PROGRAMMABLE TELEPHONE AUDIO PROCESSOR

U4091BM-R
U4092B-SD

英文版

Monolithic Integrated Feature Phone Circuit

TEMIC

U4092B-SD
U4092B-SD

英文版

Monolithic Integrated Feature Phone Circuit

TEMIC [TEM...

U4092B-SD
U4090B-NFN

英文版

Telephone Circuit (Support)

ETC

U4090B-NFN

U4090B-P Datasheet

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