| 序号 | 型号 | 描述 | 大小 | 厂家Logo | 下载 |
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| 1 | SN74LS20D | DUAL 4-INPUT POSITIVE-NAND GATES | 253K |
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| 2 | SN74LS20D | DUAL 4-INPUT NAND GATE | 46K |
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| 3 | SN74LS20D | DUAL 4-INPUT POSITIVE-NAND GATES | 932K |
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| 4 | SN74LS20DE4 | DUAL 4-INPUT POSITIVE-NAND GATES | 932K |
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| 5 | SN74LS20DG4 | DUAL 4-INPUT POSITIVE-NAND GATES | 932K |
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| 6 | SN74LS20DR | DUAL 4-INPUT POSITIVE-NAND GATES | 932K |
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| 7 | SN74LS20DRE4 | DUAL 4-INPUT POSITIVE-NAND GATES | 932K |
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| 8 | SN74LS20DRG4 | DUAL 4-INPUT POSITIVE-NAND GATES | 932K |
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