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.

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* Telephone systems Test equipment Callback Security systems Billing systems Description The.

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.

M-991-01SM

M-991-02SM

M-991-02SMTR

M-991

M-993

M-927

M-959

M-980-02

M-980-02P

M-980-02S

M-980-02T

M-982-02

M-982-02P