Dual Subscriber Private Metering (SPM) Detector

The FX641 is a low-power, system-selectable Dual Subscriber Private Metering (SPM) Detector -two detectors on a single chip- to indicate the presence, on a telephone line, of either 12kHz or 16kHz telephone call-charge frequencies. Under Processor control via a common serial Interface each channel of the FX641 will detect call-charge pulses from a telephone line and provide a digital output for recording, billing or security purposes. By Consumer Microcircuits Limited
FX641 's PackagesFX641 's pdf datasheet



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FX641 Application circuits
FX641 circuits
This is one application circuit of FX641,If you need more circuits,please download FX641's pdf datasheet.


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