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TLK10022: Choosing REF CLK

Part Number: TLK10022

I need to aggregate 4 low speed streams each at 1.8Gbps and make a fast stream at 7.2Gbps.

Based on calculator I can use a REF CLK between [150-360] MHz. According to the datasheet the highest is the best to use but I have a hard time for finding a frequency synthesizer with built-in 8 fanout buffers (LVDS or LVPECL).

Just to double check, is it fine to use 300MHz for this use case instead of the highest possible which is 360MHz considering the overall link quality?

Thanks,
Nick