| 序号 | 型号 | 描述 | 大小 | 厂家Logo | 下载 |
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| 1 | 74HC4040 | 12-stage binary ripple counter | 140K |
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| 2 | 74HC4040BQ | 12-stage binary ripple counter | 140K |
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| 3 | 74HC4040D | 12-stage binary ripple counter | 140K |
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| 4 | 74HC4040DB | 12-stage binary ripple counter | 140K |
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| 5 | 74HC4040D-T | Asynchronous Up Counter | 100K |
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| 6 | 74HC4040N | 12-stage binary ripple counter | 140K |
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| 7 | 74HC4040PW | 12-stage binary ripple counter | 140K |
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