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    | Partname: | FX621 |  | Description: | Low-Power Subscriber Private Metering (SPM) Detector |  | Manufacturer: | Consumer Microcircuits Limited |  | Datasheet: | PDF (116K). Click here to download *)
 |  | The FX621 is a single-chip, low-power CMOS tone detector designed for use in both PABX and general payphone applications for Subscriber Private Metering. The Decode and Not-Decode band edges are accurately defined by the use of an external 4.433619MHz crystal. |  |  Click here to download FX621 Datasheet*)
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