UTC MC34018 LINEAR INTEGRATED CIRCUIT VOICE SWITCHED SPEAKER-PHONE CIRCUIT 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.
SOP-28 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 volta...

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