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TUSB1002A: Datasheet Question about Capacitor

Part Number: TUSB1002A

Dear Team,

My customer has two questions about the schematic of the datasheet. Please kindly help to answer. Thank you.

1. Besides 330nF caps on RX lane, could we use another capacitance value like 470nF or larger on RX lane? Is there any acceptable range for this capacitance?  

2. What is the purpose of C7/C8/R1 in below schematic? Is that necessary? 

Thank you.

Regards,

Jim