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ISOW7841A-Q1: Which is the better for EMC performance?the not used pins are floated(not connect any thing) or the not used pins connected to each GND.

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Part Number: ISOW7841A-Q1

Dear experts.

I used the ISOW7841 for our application. I only use one input and one output.

I don't use the other two pins. Which is the better for EMC performance?

the not used pins are floated(not connect any thing) or the not used pins connected to each GND.

Thanks.