U4089B-PFNY

U4089B-PFNY Datasheet


Atmel U4089B-P

Part Datasheet
U4089B-PFNY U4089B-PFNY U4089B-PFNY (pdf)
Related Parts Information
U4089B-PFNG3Y U4089B-PFNG3Y U4089B-PFNG3Y
PDF Datasheet Preview
• Adjustable DC Characteristic
• 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 Open-listening 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
• Complete System Integration of Analog Signal Processing on One Chip
• Very Few External Components
• Less Components for EMI protection

Monolithic Integrated Feature Phone Circuit

Atmel U4089B-P
• Feature Phones
• Answering Machines
• Fax Machines
• Speaker Phones

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 open-listening or hands-free operation. With an anti-feedback function, acoustical feedback during open listening can be reduced significantly. The generated supply voltage is suitable for a wide range of peripheral circuits.

Figure Simple Block Diagram

Speech circuit

Voice switch

Audio amplifier

Dialer

Figure Block Diagram
4 MIC1

MIC 3 MIC2
1 DTMF

TTXA

INLDR INLDT TLDR TLDT ATAFS
26 Acoustical
29 feedback 28 suppression
control 25
11 SAO
21 TSACL

SACL
23 SAI
22 GSA

GT 44

STO V L
600Ω

IMPSEL AGA IND

SENSE VB

V MP 13
900Ω TXA

Impedance control

Power supply
33 V M GND

Transmit mute control

AGA control

Current supply 31 IREF Supply

Rattenuation
24 MUTX
Ordering Information

Extended Type Number U4089B-PFNY U4089B-PFNG3Y

Package SSO44

Package Information

Package SSO44

Dimensions in mm

Remarks Tubes, Pb-free Taped and reeled, Pb-free
technical drawings according to DIN specifications

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Datasheet ID: U4089B-PFNY 519491