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trace delay of PCB vary much in different PVT case?

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tavidu

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trace delay

Hi,
As we know, delay of gate in chip is different in different PVT, or in worst case and in best case.
But in PCB, trace delay vary much in different case?
For example, 5 inch length 's delay is 5*160 = 0.8ns accroding to 160ps/inch. 0.8ns is in which PVT case?
 

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