M-980-02

• Covers the 315 to 640 Hz range (common 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)

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 complete filtering and control required for this function. The basic timing of the M- 980-02 is designed to permit operation with almost any progress tone  ystem.

The use of integrated circuit techniques allows the M-980-02 to pack the complete frequency and amplitude portion of call progress following into a single 8- pin DIP or 16-pin SOIC. A 3.58 MHz crystal-controlled time base guarantees accuracy and repeatability. 3V/5V operation increases customer flexibility, improves reliability, and minimizes power consumption