U4089B-P
| Model | U4089B-P |
| Description | Monolithic Integrated Feature Phone Circuit |
| PDF file | Total 26 pages (File size: 541K) |
| Chip Manufacturer | ATMEL |
Features
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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
Built-in Ear Protection
DTMF and MUTE Input
Adjustable Sidetone Suppression Independent of Sending and Receiving
Amplification
Integrated Amplifier for Loudhearing Operation
Anti-clipping for Loudspeaker Amplifier
Improved Acoustical Feedback Suppression
Selectable Line Impedance
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
Monolithic
Integrated
Feature Phone
Circuit
U4089B-P
Benefits
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Complete System Integration of Analog Signal Processing on One Chip
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Very Few External Components
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Less Components for EMI protection
Applications
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Feature Phones
Answering Machines
Fax Machines
Speaker Phones
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 loudhearing or hands-
free operation. With an anti-feedback function, acoustical feedback during loud-
hearing 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. 4518A–CORD–05/02
1
Related PDFs
| Model | Description | Manufacturer | Operation |
|---|---|---|---|
 U4089B-PFN
|
Monolithic Integrated Feature Phone Circuit | ATMEL | Preview |
|
U4089B-PFNG3
|
Monolithic Integrated Feature Phone Circuit | ATMEL | Preview |
