| 序号 | 型号 | 描述 | 大小 | 厂家Logo | 下载 |
|---|
| 1 | SL74HC257 | Quad 2-Input Data Selector/Multiplexer with 3-State Outputs | 48K |
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| 2 | SL74HC257D | Quad 2-Input Data Selector/Multiplexer with 3-State Outputs | 48K |
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| 3 | SL74HC257N | Quad 2-Input Data Selector/Multiplexer with 3-State Outputs | 48K |
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