DESCRIPTION

The UTC MC34018 speaker-phone integrated circuit incorporates the necessary functions to produce a high quality hands-free speaker-phone system. The applications include household and office speaker-phones, intercom systems, hand free kit for mobile phones, and others.

FEATURES

* All necessary level detection and attenuation controls for a hand-free telephone included.

* Background noise level monitoring with long time constant.

* Background sound level compensation for transmit and receive levels as well as the background level.

* Wide operating dynamic range through signal compression.

* On-chip voltage regulators illuminate external regulators for lining operation.

* Power audio amplifier for typical 100mW output (into 25 ohms)with peak limiting for speaker to minimize distortion.

* Chip Select pin for active/stand by operation.

* Volume control function for external volume control.

* Standard 28-pin plastic DIP and SOP package.