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    | Partname: | FX651 |  | Description: | SRM and security subsystem |  | Manufacturer: | Consumer Microcircuits Limited |  | Package: | plastic S.O.I.C. |  | Pins: | 16 |  | Oper. temp.: | -40 to 85 |  | Datasheet: | PDF (586K). Click here to download *)
 |  | The FX651 integrated circuit combines 12kHz Subscriber Private Metering (SPM) detection with 18kHz tone processing for anti-fraud purposes within a telephone system. This compact, low power device is suitable for battery or line powered systems. Under simple logic or Processor control it will: Decode 12kHz SPM pulses in the presence of high level voice and 18kHz signalling, and provide a logic output. |  |  Click here to download FX651 Datasheet*)
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