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两级电平转换LSF0102，第二级输出不正常

quanzeng wei
Prodigy 50 points
Other Parts Discussed in Thread: LSF0102

求助：电平转换问题
两级电平转换LSF0102，第一级由1.2V转3.3V，第二级有3.3V转1.2V，

按照手册参考原理图和推荐上拉阻值，单独测量第一级输出正常，但加上第二级输出不正常。