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 c...

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