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    | Partname: | FX128D4 |  
    | Description: | Audio band scrambler. |     
    | Manufacturer: | Consumer Microcircuits Limited |  
    | Package: | SOIC |  
    | Pins: | 16 |  
    | Oper. temp.: | -40 to 85 |  
    | Datasheet: | PDF (285K). Click here to download *) |  
    The FX/MX128 is a full-duplex frequency inversion scrambler designed to provide secure conversations. The Rx and Tx audio paths consist of the following: 1. A switched-capacitor balanced modulator with high baseband and carrier rejection. 2. A 3.3 kHz inversion carrier (injection tone). 3. A 3100 Hz lowpass filter.  |  
    
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    Click here to download FX128D4 Datasheet*) | 
  
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