| 序号 | 型号 | 描述 | 大小 | 厂家Logo | 下载 |
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| 1 | 74LS20 | Dual 4-Input NAND Gate | 46K |
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| 2 | 74LS20 | Dual 4-input Positive NAND Gates | 43K |
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| 3 | 74LS20 | DUAL 4-INPUT POSITIVE-NAND GATES | 253K |
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| 4 | 74LS20 | Dual 4-Input NAND Gates | 127K |
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| 5 | 74LS20 | DUAL 4-INPUT NAND GATE | 46K |
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| 6 | 74LS20DC | Dual 4-input NAND Gate | 131K |
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| 7 | 74LS20PC | Dual 4-input NAND Gate | 131K |
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| 8 | 74LS20SC | Dual 4-input NAND Gate | 131K |
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