U4090B-PFNY

U4090B-PFNY Datasheet


U4090B-P

Part Datasheet
U4090B-PFNY U4090B-PFNY U4090B-PFNY (pdf)
Related Parts Information
U4090B-PFNG3Y U4090B-PFNG3Y U4090B-PFNG3Y
PDF Datasheet Preview
• 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
• Filters against EMI on Critical I/O
• Feature Phone
• Answering Machine
• Fax Machine
• Speaker Phone
• Savings of One Piezoelectric Transducer
• Complete System Integration of Analog Signal Processing on One Chip
• Very Few External Components
• Fewer Components for EMI Protection

Monolithic Integrated Feature Phone Circuit EMI Improved

U4090B-P

The microcontroller-controlled telephone circuit U4090B-P 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 necessary 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-hearing can be reduced significantly. The generated supply voltage is suitable for a wide range of peripheral circuits.

Figure Block Diagram

Speech circuit

Audio amplifier

Loudhearing and

Tone ringing

Voice switch

Tone ringer

MC with

EEPROM/ DTMF
2 U4090B-P

MIC1 MIC2 DTMF TTXA

DTMF

INLDR 28

INLDT 27 Acoustical

TLDR 30 feedback

TLDT
suppression control

ATAFS
22 TSACL
24 SAI

SACL SAI
23 GSA

GT MICO TXIN

STO VL 33 8

IMPSEL 21

AGA IND 31 7

SENSE VB 10 11

VMP 14

VMPS 13

Impedance control

Power supply

Current supply

Transmit mute
Ordering Information

Extended Type Number U4090B-PFNY U4090B-PFNG3Y T4090B-PC

Package Information

Package SSO44

Dimensions in mm

Package SSO44

Remarks Pb-free Taped and reeled, Pb-free Chip on foil
technical drawings according to DIN specifications
34 U4090B-P

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Printed on recycled paper.
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Datasheet ID: U4090B-PFNY 519492