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A Featurephone Design With Tone Ringer and Dialer Using the MC34118 Speakerphone IC.pdf

September 26, 2008 · Filed Under Motorola  · Tags: ,

Introduction: This application note describes how to add a handset, dialer and tone ringer to the MC34118 speakerphone circuit. Although any one of several speech networks could be used as an interface between the MC34118 and the phone line, this application note covers the case where simplicity and low cost are paramount. A privacy (Mike Mute) function is included, but not pulse dialing, nor line length compensation.

Two circuit are developed in this discussion: a line-powered featurephone and one powered from a power supply. The circuits arenearly identical, except for the Tip and Ring interface. Their parameter however, differ noticeably, particularly in the low loop current range.

Contents:

  • MC34118 Description
  • Line Powered Featurephone
  • Using a Power Supply Instead of Line Power
  • Construction Hints.

This manual is available FREE at Ugly Duck website, we merely collect the information, we are neither affiliated with the author(s), the website and Motorola brand nor responsible for its content and change of content. (Read our disclaimer here or here before you download the document from the website written above by clicking the below link).

Download free MOTOROLA Semiconductor Application Note: A Featurephone Design With Tone Ringer and Dialer Using the MC34118 Speakerphone IC.pdf (14 pages pdf file, 0.5 MB).

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