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lsf0102 3.3v与1.8v转换问题

user1865426
Intellectual 252 points
Other Parts Discussed in Thread: LSF0102

图一是原理图，图二是芯片应答的波形，为1.8V的。图三是经过lsf0201后转为3.3V的信号，后面应答的一段没有了。请问这是哪里的问题哈。谢谢各位了。