| 序号 | 型号 | 描述 | 大小 | 厂家Logo | 下载 |
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| 1 | DM74AS161N | Synchronous 4-Bit Counter with Asynchronous Clear . Synchronous 4-Bit Counter | 74K |
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| 2 | DM74AS161N/A+ | Synchronous Up Counter | 160K |
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| 3 | DM74AS161N/B+ | Synchronous Up Counter | 160K |
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