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DS90UB953-Q1: CLKOUT driving current calculation for 953

Part Number: DS90UB953-Q1

Hello Team,

My customer is asking how they calculate power consumption of IDX pin.

They applied 40.2Kohm pull down on Idx.

As I understand, device strap voltage level of IDX in power up as input IO mode and change output IO mode for CLKOUT.

So in case of my customer, 

When it works as input IO mode to strap Idx, leakage should be 0uA. because there is no path.

When it works as output IO mode, current would be 1.8V/(35K(IO internal resistor)//40.2Kohm(idx pull down resistor))=96uA.

My understanding is correct??

Thank you.