U4087B

更新时间： 2024-11-28 08:25:31

品牌	Logo	应用领域
TEMIC		电话
页数	文件大小	规格书
8页	109K
描述
Low Voltage Voice Switch Interface Circuit for Hands-free Operation in Telephone

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中文翻译

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U4087B 数据手册

U4087B

Low Voltage Voice Switch Interface Circuit for Hands-free

Operation in Telephone

Description

The voice switch interface circuit U4087B is a linear Additionally, the U4087B provides a back- ground noise

integrated circuit for improvement of handsfree monitor which makes the circuit insensitive to room

performance of U4090B system.

noise.

The Block diagram shows level detectors, back ground

noise monitor.

The U4087B provides an optimized interface to U4090B,

the necessary level detectors and switching control for a

properly operating speakerphone. The detection Due to low voltage operation it can be operated via power

sensitivity and timing are externally controllable. supply management of U4090B requiring 1.0 mA typ.

Features

Benefits

Low voltage operation: 3.0 to 7.0 V

Fast channel switching allows quasi duplex operation

Low current consumption

Four point signal sensing

Monitoring system for background noise level

Case: SO 16

Chip Disable for active/standby operation

Block Diagram

TLO2

CPT

VB VM CD GND

TLO1

Noise

detector

TLI2

Logic

TLI1

Bias

–

DIRE

–

Logic

DIRA

–

Charge

Discharge

C.T.

Generator

Logic

RLI1

RLI2

12610

RLO2

TLDR TLDT

RLO1

Figure 1. Block diagram with external circuit

TELEFUNKEN Semiconductors

1 (8)

Rev. A1, 09-Sep-96

Preliminary Information

12 3 4 5 6 7 8

中文翻译

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与U4087B相关器件

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U4087B-FP	TEMIC	获取价格	Low Voltage Voice Switch Interface Circuit for Hands-free Operation in Telephone
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U4089B-MFNG3	ATMEL	获取价格	MONOLITHIC INTEGRATED FEATUREPHONE CIRCUIT
U4089B-MSD	ETC	获取价格	Speakerphone Circuit
U4089B-P	ATMEL	获取价格	Monolithic Integrated Feature Phone Circuit
U4089B-P_05	ATMEL	获取价格	Monolithic Integrated Feature Phone Circuit
U4089B-PFN	ATMEL	获取价格	Monolithic Integrated Feature Phone Circuit
U4089B-PFN	TEMIC	获取价格	Telecom IC,