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ADuM4223 NC pin

Hello:

We found the opps for ADuM4223 replace TI's UCC21540.

But we met the pin compatible issue that  pin 6 , ADI=NC and customer let it connect to GND.

One question is , if customer wouldn't re-layout and ADI can mount it without floating?

Does it could be cause any problem?

Customer hope ADI can provide any data for reference or commitment before test ADuM4223.