MC33215B ,Telephone Line Interface and Speakerphone CircuitOrder this document by MC33215/D** * * * 52 1 *FB SUFFIXThe MC33215 is developed for use in fully ..
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MC74HC365 ,Hex 3-State Noninverting Buffer with Common EnablesELECTRICAL CHARACTERISTICS Î (Voltages Referenced to GND)ÎÎ Guaranteed LimitÎÎÎV V – 55 toÎÎÎÎÎÎC C ..
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MC33215B
Telephone Line Interface and Speakerphone Circuit
ORDERING INFORMATION
Order this document by MC33215/D- -
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 designed to operate at low line currents down to 4.0 mA
enabling parallel operation with a classical telephone set. Highly Integrated Cost Effective Solution Straightforward AC and DC Parameter Adjustments Efficient Supply for Loudspeaker Amplifier and Peripherals Stabilized Supply Point for Handset Microphone Stabilized Supply Point for Base Microphone Loudspeaker Amplifier can be Powered and Used Separately Smooth Switch–Over from Handset to Speakerphone Operation Adjustable Switching Depth for Handsfree Operation
