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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).

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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

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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

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.