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    | Partname: | MC74AC257D |  
    | Description: | Quad 2-input multiplexer with 3-state outputs |     
    | Manufacturer: | Motorola |  
    | Package: | P-SOIC |  
    | Pins: | 16 |  
    | Oper. temp.: | -40 to 85 |  
    | Datasheet: | PDF (173K). Click here to download *) |  
    The MC74AC257/74ACT257 is a quad 2-input multiplexer with 3-state outputs. Four bits of data from two sources can be selected using a Common Data Select input. The four outputs present the selected data in true (noninverted) form. The outputs may be switched to a high impedance state by placing a logic HIGH on the common Output Enable (OE) input, allowing the outputs to interface directly with bus-oriented systems.  |  
    
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    Click here to download MC74AC257D Datasheet*) | 
  
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