最近在做测试,发现RS485通信的芯片SN65HVD75DR经常容易坏,如上图,请TI技术人员给分析一下芯片失效的原因。
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RS485通信并不是一开始就不通信,系统485通信是正常的,只是系统长时间运行后,485才出现问题,经过维修查找是SN65HVD75DR芯片损坏导致。该芯片损坏通常都有哪些情况?