| 序号 | 型号 | 描述 | 大小 | 厂家Logo | 下载 |
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| 1 | IN74AC20 | DUAL 4-INPUT NAND GATE High-Speed Silicon-Gate CMOS | 154K |
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| 2 | IN74AC20 | DUAL 4-INPUT NAND GATE High-Speed Silicon-Gate CMOS | 154K |
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| 3 | IN74AC20D | DUAL 4-INPUT NAND GATE High-Speed Silicon-Gate CMOS | 154K |
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| 4 | IN74AC20D | DUAL 4-INPUT NAND GATE High-Speed Silicon-Gate CMOS | 154K |
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| 5 | IN74AC20N | DUAL 4-INPUT NAND GATE High-Speed Silicon-Gate CMOS | 154K |
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| 6 | IN74AC20N | DUAL 4-INPUT NAND GATE High-Speed Silicon-Gate CMOS | 154K |
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