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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