| 序号 | 型号 | 描述 | 大小 | 厂家Logo | 下载 | 
|---|
| 1 | SN74LVC257ADR | QUADRUPLE 2 LINE TO 1 LINE DATA SELECTORS/ MULTIPLEXERS WITH 3 STATE OUTPUTS | 552K |   |   | 
| 2 | SN74LVC257ADR | QUADRUPLE 2 LINE TO 1 LINE DATA SELECTORS/ MULTIPLEXERS WITH 3 STATE OUTPUTS | 552K |   |   |