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ISO7220隔离芯片在电源端没有加滤波电容，电源走线长度有330mm，当在串口电路中，使用波特率19200，电路开始工作时，到底有多大影响？为什么芯片会莫名其妙的损坏？电源引脚对地短路啦？？？？？？？
请各位帮忙支招！谢谢
是电源管脚对地短路。具体的是芯片的8脚对地短路。
