| 序号 | 型号 | 描述 | 大小 | 厂家Logo | 下载 |
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| 1 | MM74HC4040N | 14-Stage Binary Counter 12-Stage Binary Counter | 113K |
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| 2 | MM74HC4040N | 14-Stage Binary Counter 12-Stage Binary Counter | 116K |
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| 3 | MM74HC4040N/A+ | Asynchronous Up Counter | 118K |
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| 4 | MM74HC4040N/B+ | Asynchronous Up Counter | 118K |
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