| 序号 | 型号 | 描述 | 大小 | 厂家Logo | 下载 |
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| 1 | HD404669 | HMCS400 Series Application Notes/Q&A | 828K |
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| 2 | HD404669 | Low-Voltage AS Microcomputers with On-Chip DTMF Generation Circuit | 466K |
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| 3 | HD404669H | Low-Voltage AS Microcomputers with On-Chip DTMF Generation Circuit | 466K |
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| 4 | HD404669SERIES | 489K |
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