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M-991 - Call Progress Tone Generator

General Description

The M-991 is a call progress tone generator integrated circuit for use in telephone systems.

The circuit uses low-power CMOS techniques to generate tones which are digitally controlled and highly linear.

The M-991 is designed to permit operation with almost any system.

Key Features

  • Generates standard call progress tones Digital input control Linear (analog) output Power output capable of driving standard line 14-pin DIP and 16-pin SOIC package types Single supply 5V CMOS (low power) Inexpensive 3.58 MHz time base Temperature range from -25ºC to 70ºC (-01 version).
  • Temperature range from -40ºC to 85ºC (-02 version).

📥 Download Datasheet

Datasheet Details

Part number M-991
Manufacturer Clare Inc.
File Size 171.03 KB
Description Call Progress Tone Generator
Datasheet download datasheet M-991 Datasheet

Other Datasheets by Clare Inc.

Part Number Description
M-991-01SM Call Progress Tone Generator
M-991-01SMTR Call Progress Tone Generator
M-991-02SM Call Progress Tone Generator
M-991-02SMTR Call Progress Tone Generator
M-993 Region 1 MF Tone Generator
M-959 Dial Pulse Counter and Hook Status Monitor
M-980-02 3V/5V General Purpose Call Progress Tone Detector
M-980-02P 3V/5V General Purpose Call Progress Tone Detector
M-980-02S 3V/5V General Purpose Call Progress Tone Detector
M-980-02T 3V/5V General Purpose Call Progress Tone Detector

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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M-991 Call Progress Tone Generator Features Generates standard call progress tones Digital input control Linear (analog) output Power output capable of driving standard line 14-pin DIP and 16-pin SOIC package types Single supply 5V CMOS (low power) Inexpensive 3.58 MHz time base Temperature range from -25ºC to 70ºC (-01 version) • Temperature range from -40ºC to 85ºC (-02 version) • • • • • • • • Applications • • • • • Telephone systems Test equipment Callback Security systems Billing systems Description The M-991 is a call progress tone generator integrated circuit for use in telephone systems. The circuit uses low-power CMOS techniques to generate tones which are digitally controlled and highly linear. The M-991 is designed to permit operation with almost any system.