| 序号 | 型号 | 描述 | 大小 | 厂家Logo | 下载 |
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| 1 | KK74ACT21 | Dual 4-Input AND Gate High-Speed Silicon-Gate CMOS | 219K |
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| 2 | KK74ACT21D | Dual 4-Input AND Gate High-Speed Silicon-Gate CMOS | 219K |
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| 3 | KK74ACT21N | Dual 4-Input AND Gate High-Speed Silicon-Gate CMOS | 219K |
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