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 (<_15 mW at 3V)
Applications
• Automatic dialers
• Dialing modems
• Traffic measurement equipment
• Test equipment
• Service evaluation
• Billing systems
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