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    | Partname: | 54AC521 |  
    | Description: | 8-Bit Identity Comparator |     
    | Manufacturer: | National Semiconductor |  
    | Datasheet: | PDF (195K). Click here to download *) |  
    The AC/ACT521 is an expandable 8-bit comparator. It compares two words of up to eight bits each and provides a LOW output when the two words match bit for bit. The expansion input IA = B also serves as an active LOW enable input.  |  
    
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    Click here to download 54AC521 Datasheet*) | 
  
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