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

FX641 Pinout will be updated soon..., now you can download the pdf datasheet to check the pinouts !
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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