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    | Partname: | ST491ABDR |  
    | Description: | LOW POWER HIGH SPEED RS-485/RS422 TRANSCEIVER |     
    | Manufacturer: | SGS-Thomson Microelectronics |  
    | Datasheet: | PDF (269K). Click here to download *) |  
    The ST491A is a low power transceiver for RS-485 and RS-422 communications. The device contains one driver and one receiver in full duplex configuration. The ST491A draws 5mA (typ.) of supply current when unloaded and operates from a single 5V supply.  |  
    
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    Click here to download ST491ABDR Datasheet*) | 
  
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