PDF預(yù)覽

• 1
• 2
• 3
• 4
• 5
• 6
• 7
• 8
• 9
• 10
• 11
• 12
• 13
• 14
• 15
• 16
• 17
• 18
• 19
• 20
• 21
• 22
• 23
• 24
• 25
• 26

U4084B

Low-Voltage, Voice-Switched Circuit for Hands-Free Operation

Description

The low-voltage, voice-switched speakerphone circuit

U4084B incorporates the features listed below. The ver-

satility of the device is further enhanced by giving access

to internal circuit points.

The block diagram shows amplifiers, level detectors,

transmit and receive attenuators operating in comple-

mentary functions, back ground noise monitors, chip

disable, dial tone detector and mute function etc.

Due to low-voltage operation, it can be operated either by

low supply voltage or via a telephone line requiring

4.0 mA typ. Further features are stand-alone operation

via a coupling transformer (Tip and Ring) or in

conjunction with a handset speech network, as shown in

figure 2.

Features

D

Low-voltage operation: 3.0 to 6.5 V

D

Attenuator gain range between

D

D

D

D

D

D

D

D

transmit and receive: 52 dB

Four-point signal sensing for improved sensitivity

Monitoring system for background-noise level

Microphone-amplifier gain adjustable

Mute function

Chip disable for active/ standby operation

Dial tone detector

Compatible with the speaker amplifier U4083B

Case: DIP24 or SO24

Benefits

D

Fast channel switching enables quasi duplex

operation

D

Low current consumption for high output volume

D

Optimized U3800BM interface

TELEFUNKEN Semiconductors

Rev. A1, 31-Jan-97

1 (26)

Preliminary Information

next

U4084B相關(guān)型號(hào)PDF文件下載

• 型號(hào)
  版本
  描述
  廠商
  下載
• U4083
  英文版
  Low-Power Audio Amplifier for Telephone Applications
  TEMIC
  U4083
• U4083
  英文版
  Low-Power Audio Amplifier for Telephone Applications
  TEMIC [TEM...
  U4083
• U4080B
  英文版
  Voice-Switched Circuit for Handsfree Operation
  TEMIC
  U4080B
• U4080B
  英文版
  Voice-Switched Circuit for Handsfree Operation
  TEMIC [TEM...
  U4080B
• U4082B
  英文版
  Low-Voltage Voice-Switched IC for Hands-Free Operation
  
  U4082B
• U4083B
  英文版
  Low-Power Audio Amplifier for Telephone Applications
  TEMIC
  U4083B
• U4083B
  英文版
  Low-Power Audio Amplifier for Telephone Applications
  TEMIC [TEM...
  U4083B
• U4084B
  英文版
  Low-Voltage, Voice-Switched Circuit for Hands-Free Operation
  TEMIC
  U4084B
• U4084B
  英文版
  Low-Voltage, Voice-Switched Circuit for Hands-Free Operation
  TEMIC [TEM...
  U4084B
• U4085B
  英文版
  Technische Daten Technical Data
  ETC [ETC]
  U4085B
• U4087B
  英文版
  Low Voltage Voice Switch Interface Circuit for Hands-free Op...
  TEMIC [TEM...
  U4087B
• U4089B
  英文版
  MONOLITHIC INTEGRATED FEATUREPHONE CIRCUIT
  ATMEL [ATM...
  U4089B
• U4089B-M
  英文版
  MONOLITHIC INTEGRATED FEATUREPHONE CIRCUIT
  ATMEL [ATM...
  U4089B-M
• U4089B-P
  英文版
  Monolithic Integrated Feature Phone Circuit
  
  U4089B-P
• U4089B-P
  英文版
  Monolithic Integrated Feature Phone Circuit
  ATMEL [ATM...
  U4089B-P
• U4084B-FL
  英文版
  Speakerphone Circuit
  ETC
  U4084B-FL
• U4087B-FP
  英文版
  Low Voltage Voice Switch Interface Circuit for Hands-free Op...
  TEMIC [TEM...
  U4087B-FP
• U4083B-AFP
  英文版
  Low-Power Audio Amplifier for Telephone Applications
  TEMIC
  U4083B-AFP
• U4083B-AFP
  英文版
  Low-Power Audio Amplifier for Telephone Applications
  TEMIC [TEM...
  U4083B-AFP
• U4089B-MFN
  英文版
  MONOLITHIC INTEGRATED FEATUREPHONE CIRCUIT
  ATMEL [ATM...
  U4089B-MFN

您可能感興趣的PDF文件資料

• U4080B
• U4083B-AFPG3
• U4083B-AFPG3
• U4083B-AFP
• U4083B-AFP
• U4083B 
• U4083B
• U4083B
• U4083
• U4083
• U4082B 
• U4082B

熱門IC型號(hào)推薦

• UPD71055C
• UC2825N
• UDA1334BTS
• UPA2716GR-E1
• UCC3813D-2
• UMD9
• UCC27524DR
• ULN2004AN
• UA78M33CDCYR
• UDZS10B
• UCC27201DDAR
• UPG152TA-E3