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    | Partname: | MT8840AS |  
    | Description: | 5V; 2.5mA; data over voice modem. For simultaneous data and voice communication in PABXs, 2kbits/s data modem, smart telephone sets |     
    | Manufacturer: | Mitel Semiconductor |  
    | Package: | SOIC |  
    | Pins: | 18 |  
    | Oper. temp.: | 0 to 85 |  
    | Datasheet: | PDF (56.5K). Click here to download *) |  
    The MT8840 is a carrier over voice modem which allows simultaneous transfer of voice and data over a single pair of wires. Data is transferred on an amplitude shift keyed (ASK) 32 kHz carrier. On-chip filters remove voice frequency signals from the received composite voice and data signal prior to demodulation. The modulating signal is a bit stream with a typical data rate of 2 kbit/s. In addition, the device contains a two tone warbler which functions as a telephone ringer. The device is fabricated in MITEL's  |  
    
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    Click here to download MT8840AS Datasheet*) | 
  
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