Description

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 system.

Features

• 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 (

Applications

• Automatic dialers

• Dialing modems

• Traffic measurement equipment

• Test equipment

• Service evaluation

• Billing systems