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U4091BM-N

ATMEL
Part Number U4091BM-N
Manufacturer ATMEL
Description Programmable Telephone Audio Processor
Published May 25, 2014
Detailed Description Features • • • • Speech Circuit with Anti-clipping Tone-ringer Interface with DC/DC Converter Speaker Amplifier with Ant...
Datasheet PDF File U4091BM-N PDF File

U4091BM-N
U4091BM-N

Overview
Features • • • • Speech Circuit with Anti-clipping Tone-ringer Interface with DC/DC Converter Speaker Amplifier with Anti-distortion Power-supply Management (Regulated, Unregulated) and a Special Supply for Electret Microphone • Voice Switch • Interface for Answering Machine and Cordless Phone Applications • • • • • Feature Phone Answering Machine Fax Machine Speaker Phone Cordless Phone Programmable Telephone Audio Processor U4091BM-N Benefits • No Piezoelectric Transducer for Tone Ringing Necessary • Complete System Integration of Analog Signal Processing on One Chip • Very Few External Components Description The programmable telephone audio processor U4091BM-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 necessary for signal amplification and adaptation to the line.
The U4091BM-N can also be supplied via an external power supply.
An integrated voice switch with loudspeaker amplifier enables hands-free or loudhearing operation.
With an anti-feedback function, acoustic feedback during loudhearing can be reduced significantly.
The generated supply voltage is suitable for a wide range of peripheral circuits.
Rev.
4666B–CORD–08/04 http://www.
Datasheet4U.
com Figure 1.
Block Diagram Speech circuit Voice switch Audio amplifier Clock Data Reset Serial bus DTMF Tone ringer MCU 2 U4091BM-N 4666B–CORD–08/04 4666B–CORD–08/04 VL 2 38 17 TXACL 15 STBAL 43 44 39 42 9 10 1 8 5 Figure 2.
Detailed Block Diagram Power supply 16 12 AGATX 4 3 MICRO AGARX TXA 11 30 Offset canceler Filter MUX MIC V MIC 40 DTMF/ melody Offset canceler 22 21 Ringing power converter 19 20 LIDET VMP RFDO AGCO LRX DTMF AMPB ADC V RING AGC AGCI AMREC EPO RXLS LTX Switch matrix optional 41 REG POR 7 6 SACL SA 14 13 35 AFS control RA DIV...


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