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參數(shù)資料
| 型號： | U4090B-NFN |
| 英文描述： | Low power dual voltage comparators |
| 中文描述： | 電話線路（支援） |
| 文件頁數(shù)： | 1/34頁 |
| 文件大?。?/td> | 622K |
| 代理商： | U4090B-NFN |
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Rev. 4740A–CORD–09/03
Features
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
Applications
Feature Phone
Answering Machine
Fax Machine
Speaker Phone
Benefits
Savings of One Piezoelectric Transducer
Complete System Integration of Analog Signal Processing on One Chip
Very Few External Components
Description
The microcontroller-controlled telephone circuit U4090B-N 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.
Monolithic
Integrated
Feature Phone
Circuit
U4090B-N
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| U4090B-NFNG3 | Low power dual voltage comparators |
| U4090B-P | Low power dual voltage comparators |
| U4091BM-AFN | Low power dual voltage comparators |
| U4091BM-AFNG3 | Low power dual voltage comparators |
| U4091BM-MFN | Low power dual voltage comparators |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| U4090B-NFNG3 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telecommunication IC |
| U4090B-P | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:Monolithic Integrated Feature Phone Circuit EMI Improved |
| U4090B-PFNG3Y | 功能描述:電信語音調(diào)制 IC COM.CORDED - FEATURE RoHS:否 制造商:Epson Electronics America 產(chǎn)品: 應用:Voice Guidance product 封裝 / 箱體:PQFP-52 電源電壓-最大:3.6 V, 5.5 V 最大工作溫度: 最小工作溫度: 封裝: |
| U4090B-PFNY | 功能描述:電信語音調(diào)制 IC COM.CORDED - FEATURE RoHS:否 制造商:Epson Electronics America 產(chǎn)品: 應用:Voice Guidance product 封裝 / 箱體:PQFP-52 電源電壓-最大:3.6 V, 5.5 V 最大工作溫度: 最小工作溫度: 封裝: |
| U4091B | 制造商:TEMIC 制造商全稱:TEMIC Semiconductors 功能描述:Programmable Telephone Audio Processor |
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