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MC33215A

ARCHIVED - Telephone Line Interface and Speakerphone Ciruit; \n\n?Straightforward AC and DC Parameter Adjustments\n\n?Efficient Supply for Loudspeaker Amplifier and Peripherals\n\n?Stabilized Supply Point for Handset Microphone\n\n?Stabilized Supply Point for Base Microphone\n\n?Loudspeaker Amplifier can be Powered and Used Seperately\n\n?Smooth-Switch-Over from Handset to Speakerphone Operation\n\n?Adjustable Switching Depth for Handsfree Operation;

Overview The MC33215 is developed for use in fully electronic telephone sets with speakerphone functions. The circuit performs the ac and dc line termination, 2-4 wire conversion, line length AGC and DTMF transmission. The speakerphone part includes a half duplex controller with signal and noise monitoring, base microphone and loudspeaker amplifiers and an efficient supply. The circuit is desinged to operate at low line currents down to 4.0 mA enabling parallel operation with a classical telephone set.\n ?\n MC33215 removed from active portfolio. Possible Replacement Part:? None\n Archived content is no longer updated and is made available for historical reference only.\n

MC33215

TelephoneLineInterfaceandSpeakerphoneCircuit

TheMC33215isdevelopedforuseinfullyelectronictelephonesetswithspeakerphonefunctions.Thecircuitperformstheacanddclinetermination,2–4wireconversion,linelengthAGCandDTMFtransmission.Thespeakerphonepartincludesahalfduplexcontrollerwithsignalandnoisemonitoring

MC33215B

TelephoneLineInterfaceandSpeakerphoneCircuit

TheMC33215isdevelopedforuseinfullyelectronictelephonesetswithspeakerphonefunctions.Thecircuitperformstheacanddclinetermination,2–4wireconversion,linelengthAGCandDTMFtransmission.Thespeakerphonepartincludesahalfduplexcontrollerwithsignalandnoisemonitoring

MC33215BE

TelephoneLineInterfaceandSpeakerphoneCircuit

MC33215FB

TelephoneLineInterfaceandSpeakerphoneCircuit

TheMC33215isdevelopedforuseinfullyelectronictelephonesetswithspeakerphonefunctions.Thecircuitperformstheacanddclinetermination,2–4wireconversion,linelengthAGCandDTMFtransmission.Thespeakerphonepartincludesahalfduplexcontrollerwithsignalandnoisemonitoring