| 序号 | 型号 | 描述 | 大小 | 厂家Logo | 下载 |
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| 1 | TC74HC20AFN | DUAL 4 - INPUT NAND GATE | 241K |
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| 2 | TC74HC20AFN | DUAL 4 - INPUT NAND GATE | 241K |
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| 3 | TC74HC20AFN | CMOS Digital Integrated Circuit Silicon Monolithic Dual 4-Input NAND Gate | 262K |
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