| 序号 | 型号 | 描述 | 大小 | 厂家Logo | 下载 |
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| 1 | N74F540 | Octal inverter buffer 3- State | 86K |
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| 2 | N74F540D | Octal inverter buffer 3- State | 86K |
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| 3 | N74F540DB | 8-Bit Inverting Buffer/Driver | 355K |
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| 4 | N74F540D-T | 8-Bit Inverting Buffer/Driver | 355K |
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| 5 | N74F540N | 8-Bit Inverting Buffer/Driver | 355K |
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| 6 | N74F540N-B | 8-Bit Inverting Buffer/Driver | 355K |
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