MC33215

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. The circuit is designed to operate at low line currents down to 4.0 mA enabling parallel operation with a classical telephone set. 52 1 FB SUFFIX PLASTIC PACKAGE CASE 848B (TQFP–52) 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 ORDERING INFORMATION Device MC33215FB MC33215B Operating Temperature Range TA = –20° to +70°C Package TQFP–52 SDIP–42 42 1 B SUFFIX PLASTIC PACKAGE CASE 858 (SDIP–42) Simplified Application AC Impedance DC Offset Line Current Telephone Line DTMF Handset Microphone Base Microphone MF HM Attenuator Duplex Controller Rx Line Driver Current Splitter 1:10 VCC Supply BM DC Slope Receive Signal VCC or Ex...