Hi!
I have a customer looking to use the LMK00334RTVR clock fanout buffer. He has looked at the CEM2SLIMSAS-EVM manual schematic and noticed there are no coupling capacitors on the REFCLK lines. The PCI-Express specification states that the signal lines need to be capacitively coupled, so I’m assuming this would also be true for the clock lines. Is there a reason coupling capacitors are not included/needed on the CEM2SLIMSAS-EVM board? Also the clock outputs are terminated, do the clock inputs need to be terminated?
Thanks!