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The UTC MC34118 voice switched speaker-phone integrated circuit incorporates the necessary amplifiers, attenuators, level detectors and control algorithm to form the heart of a high quality hands-free speaker-phone system.
It includes a microphone amplifier with adjustable gain and mute control.
Transmit and Receive attenuators which operate in a complementary manner, level detectors at both input and output of both attenuators, and background noise monitors for both the transmit and receive channels.
A dial tone detector prevents the dial tone from being attenuated by the receive background noise monitor circuit. Also two line driver amplifiers which can be used to form a hybrid network in conjunction with an external coupling transformer.
A high-pass filter can be used to filter out 60Hz noise in the receive channel, or for other filtering functions.
A chip disable pin permits powers down the entire circuit to conserve power on long loops where loop current is at a minimum.
The UTC MC34118 may be operated from a power supply, or it can be powered from the telephone line, requiring typically 5mA.
The UTC MC34118 can be interfaced directly to TIP and RING( through a coupling transformer) for stand-alone operation, or it can be used in conjunction with a handset speech network and/or other features of a feature phone.
The L package style has now been replaced with the fully Halogen free G version.
Orders below £100.00 can be delivered by Registered Post at a rate of £3.50 (allow 3-5 days) or a next day tracked courier at a rate of £9.00.
Orders above £100.00 are delivered by a next day tracked courier at a rate of £9.00.
Orders below €100.00 can be delivered by Airmail (allow 5-7 days) at a rate of €5.50 or by a tracked courier at a rate of €19.50 (1-2 days).
Orders to European countries above €100.00 are delivered by a tracked courier at a rate of €19.50 (1-2 days).
Orders below $110.00 can be delivered by Airmail at a rate of $9.00 (allow up to 10 days) or by tracked courier at a rate of $30.00 (1-3 days).
Orders above $110.00 are delivered by a tracked courier at a rate of $30.00 (1-3 days).
Orders below $50.00 can be delivered by post (allowing up to 28 days) at a rate of $18.00 or by a tracked courier at a rate of $49.00.
Orders above $50.00 are delivered by tracked courier at a rate of $49.00.
All prices shown exclude VAT
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