| 序号 | 型号 | 描述 | 大小 | 厂家Logo | 下载 |
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| 1 | IN74AC253D | Dual 4-Input Data Selector/Multiplexer with 3-State Otputs High-Speed Silicon-Gate CMOS | 201K |
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| 2 | IN74AC253D | Dual 4-Input Data Selector/Multiplexer with 3-State Otputs High-Speed Silicon-Gate CMOS | 241K |
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