DESCRIPTION

· The MC33215 is designed for fully electronic telephone sets with speakerphone functionality.

· It handles AC and DC line termination, 2-4 wire conversion, line length AGC, and DTMF transmission.

· The speakerphone section includes a half-duplex controller, signal and noise monitoring, microphone and loudspeaker amplifiers, and an efficient power supply.

· It operates at low line currents down to 4.0 mA, allowing parallel use with traditional telephone sets.

FEATURES

· Highly integrated, cost-effective solution.

· Easy AC and DC parameter adjustments.

· Efficient power supply for loudspeaker amplifier and peripherals.

· Stabilized power points for handset and base microphones.

· Loudspeaker amplifier can be powered and used independently.

· Smooth transition between handset and speakerphone modes.

· Adjustable switching depth for hands-free operation.

APPLICATIONS

· Fully electronic telephone sets with speakerphone capabilities.

· Systems requiring low line current operation.

· Devices needing efficient power management for audio components.