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MC33215 Datasheet Telephone Line Interface and Speakerphone Circuit

Manufacturer: Motorola Semiconductor (now NXP Semiconductors)

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Overview

Order this document by MC33215/D MC33215 Advance Information Telephone Line Interface and Speakerphone Circuit 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.

Key Features

  • Line Driver and Supply.
  • AC and DC Termination of Telephone Line.
  • Adjustable Set Impedance for Real and Complex Termination.
  • Efficient Supply Point for Loudspeaker Amplifier and Peripherals.
  • Two Stabilized Supply Points for Handset and Base Microphones.
  • Separate Supply Arrangement for Handset and Speakerphone Operation Handset Operation.
  • Transmit and Receive Amplifiers.
  • Differential Microphone Inputs.
  • Sidetone Cancellation Ne.

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