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PROCESSOR-SDK-AM69A: AM69A LP-HCSL REF CLK

Part Number: PROCESSOR-SDK-AM69A
Other Parts Discussed in Thread: AM69A, CDCE6214

I am going to to use PCIe GEN3 in AM69A. In the design I will use a clock generator and a clock multiplier for ref clocks. 

But at this point I have a question.

The clock generator will generate ref clks with 1.8V output voltage . However clock multiplier output voltages are 3.3v and AM69A serdes voltages are 1.8V also.

In this diagram can I directly connect ref clks to each other. Or do I have to use ac coupling caps ?

Could you please give information?

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