| 序号 | 型号 | 描述 | 大小 | 厂家Logo | 下载 |
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| 1 | MC74HC4020ADR2 | 14-Stage Binary Ripple Counter | 171K |
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| 2 | MC74HC4020ADR2 | 14−Stage Binary Ripple Counter High−Performance Silicon−Gate CMOS | 117K |
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| 3 | MC74HC4020ADR2G | 14−Stage Binary Ripple Counter High−Performance Silicon−Gate CMOS | 117K |
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