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ISO1042: ISO1042偶發性損壞可能的問題?

Part Number: ISO1042

您好,請問TI工程師 我有一款治具上有使用ISO1042,但是偶爾會發生燒毀的問題!上圖為我目前的電路架構...

我想請問在什麼不當可能的情況下會造成ISO1042損壞,如:Vcc灌回去TX或RX之類的情況?

謝謝!