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Voice Switched Speaker-Phone IC  MC34118L-SOP28-R

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Features

  • Improved attenuator gain range: 52dB between Transmit and Receive
  • Low voltage operation for line-powered applications(3~6.5V)
  • 4-point signal sensing for improved sensitivity
  • Background noise monitors for both Transmit and Receive paths
  • Microphone amplifier gain set by external
  • Resistors-Mute function included
  • Chip disable for active/standby operation
  • On board filter pinned-out for user defined function
  • Dial tone detector to inhibit receive idle mode during dial tone presence
  • Equivalent to Atmel U4082B

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.

  • Manufacturer: unisonic
  • Outline: SSOP-28
  • Part Status: Available but not recommended for new design
  • Pack size: REEL 1000

UK Customers

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.


European Customers

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).


US Customers

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).


International Customers

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

TECHNICAL SPECIFICATIONS

Please click on the Data Sheet link below

DATASHEETS & RELATED RESOURCES

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