M-980-02 Overview
The M-980-02 is an integrated circuit tone detector for general purpose use in automatic following of switched telephone calls. The circuit uses low-power CMOS techniques to provide the plete filtering and control required for this function. The basic timing of the M980-02 is designed to permit operation with almost any progress tone system.
M-980-02 Key Features
- Covers the 315 to 640 Hz range (mon call progress)
- Sensitivity to -38 dBm
- Dynamic range over 38 dB
- 40 ms minimum detect
- 8-pin DIP or 16-pin SOIC
- Single supply CMOS (low power)
- Supply range 2.8 to 5.5 VDC
- Inexpensive 3.58 MHz time base
- Low power consumption (<_15 mW at 3V)