| 序号 | 型号 | 描述 | 大小 | 厂家Logo | 下载 |
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| 1 | MC74HC390ADTR2 | Dual 4-Stage Binary Ripple Counter with ±2 and ±5 Sections | 208K |
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| 2 | MC74HC390ADTR2 | Dual 4−Stage Binary Ripple Counter with /2and /5 Sections High−Performance Silicon−Gate CMOS | 130K |
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| 3 | MC74HC390ADTR2G | Dual 4−Stage Binary Ripple Counter with /2and /5 Sections High−Performance Silicon−Gate CMOS | 130K |
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