M-991-02SMTR - Call Progress Tone Generator
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.
The use of integrated circuit
M-991-02SMTR 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)
* Tem
