| 序号 | 型号 | 描述 | 大小 | 厂家Logo | 下载 |
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| 1 | 74HCT640D | Octal bus transceiver; 3-state; inverting | 48K |
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| 2 | 74HCT640DB | Octal bus transceiver; 3-state; inverting | 48K |
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| 3 | 74HCT640D-T | Single 8-Bit Inverting Bus Transceiver | 93K |
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