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HD3SS460: HD3SS460 impedance & VCM application

Part Number: HD3SS460

Hi Sir,

Our customer want to use the HD3SS460 on Type-c application,

but they are have two question need to clarify,

Q1: The datasheet is show the impedance of 85 to 90 ohm, but DP spec is 100 ohm.

if our customer want to use the HD3SS460  on displayport application, what's impedance for recommend?

Q2:HD3SS460 datasheet is show the VCM>2V condition use the pull down 100k to GND,

But we are see the HD3SS460EVM-SRC & USB Type-C™ Mini Dock EVM   document Both are No AC Coupling Caps,

What's condition the HD3SS460 SSTX/SSRT need use the 500nF/100k? What's condition the VCM>2V?

Hugo