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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.  |  
    
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    Click here to download FX651 Datasheet*) | 
  
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