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TRS3232E-Q1: Unused pin status

Part Number: TRS3232E-Q1

Tool/software:

Dear team, 

My customer would like to use TRS3232E-Q1 for their application. 

At datasheet, we can see "  If only one driver is needed, the unused driver input should be connected to VCC or ground." 

But how about the unused output DOUT2, ROUT2? Do we have to connect these pins to VCC / Ground or floating? 

Below is customer schematic. please review it also and let me know your opinion. 

 Thank you.