MC34118G-S28-R Voice Switched Speaker-Phone IC
Product Code:
MC34118G-S28-R
The UTC MC34118 voice switched speaker-phoneintegrated circuit incorporates the necessary amplifiers,attenuators, level detectors and control algorithm to form theheart of a high quality hands-free speaker-phone system.
It includes a microphone amplifier with adjustable gain andmute 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 bythe receive background noise monitor circuit. Also two linedriver amplifiers which can be used to form a hybrid networkin conjunction with an external coupling transformer.
A high-pass filter can be used to filter out 60Hz noise in thereceive 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 bepowered 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.
European Customers
Orders to European countries are delivered by a tracked courier at a rate of €19.50 (5-7 working days).
Deliveries to the EU will be dispatched from the UK via our distribution hub in the Netherlands. You will receive tracking information direct from our courier company when the goods leave the distribution hub.
Using this method means there is no need for you to clear your goods through customs, and VAT will be charged on your invoice in accordance with EU VAT regulations – If you are VAT registered, VAT is 0% using the Reverse Charge rules. If you are not a VAT registered business, VAT is charged at your country’s standard rate.
All prices shown exclude VAT.
View all delivery rates
