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现在想选择一个时钟芯片，实现外部差分输入，至少4路fanout，输出电平标准为lvds或者是lvpecl，芯片只需要实现的distributor，无需对于输入信号的频率进行改变。
可以考虑DS25BR204，DS10BR254这两款LVDS 1:4 fanout器件。这两款的主要区别在于能够支持的信号速率不同。你可根据实际应用需求进行选择。
