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[嵌入式] 时钟芯片DS12c887
说明: Drop-in replacement for IBM AT computer clock/calendar Pin compatible with the MC146818B and DS1287 Totally nonvolatile with over 10 years of operation in the absence of power Self-contained subsystem includes lithium, quartz, and support circ<zilanchenxingyu> 上传 | 大小:195kb