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U3900BM Datasheet(PDF) 1 Page - TEMIC Semiconductors |
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U3900BM Datasheet(HTML) 1 Page - TEMIC Semiconductors |
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1 / 34 page  U3900BM Target Specification Rev. A2, 25-Aug-98 1 (34) Programmable Telephone Audio Processor Description The programmable telephone audio processor U3900BM is a linear integrated circuit for use in feature phones, answering machines, fax machines and cordless phones. 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 U3900BM can also be supplied via an external power supply. An integrated voice switch with loudspeaker amplifier enables hands-free or loud- hearing operation. With an anti-feedback function, acoustical feedback during loudhearing can be reduced significantly. The generated supply voltage is suitable for a wide range of peripheral circuits. Features D Speech circuit with anti-clipping D Tone ringer interface with DC/DC converter D Speaker amplifier with anti-distortion D Power-supply management, regulated, unregulated and a special supply for electret microphone D Voice switch D CLID + SCWID D DTMF generator D Switch matrix D Line current information D Fully programmable D Watchdog Benefits D Savings of one piezoelectric transducer D Complete system integration of analog signal processing on one chip D Very few external components D Highly integrated solution D Extremely versatile due to full programmability Applications Feature phone, answering machine, fax machine, speaker phone, base station of cordless phone 14602 Speech circuit Voice switch Audio amplifier Serial bus Class Clock Data Reset MCU DTMF Tone ringer Ordering Information Extended Type Number Package Remarks U3900BM-AFN SSO44 U3900BM-AFNG3 SSO44 Taped and reeled |
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