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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. |  |  Click here to download MC74AC257D Datasheet*)
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