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用SN74ALVC164245 做接口电平转换,5V转3.3V。
36pin 2A1输出异常,正常输出为3.3V,现在只能输出1V以下的电平。此产品已量产多批次,现召回部分1PCS不良品,原理图和PCB如下:
不良品已丢失,无法做一进步的测试确定问题。帮忙依据以往的经验定位问题点以及提供相关防护措施,谢谢!