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74HC595 抗干扰不好。EFT44KV测试时显示出现闪烁,

74HC595  EFT4KV  测试时显示出现闪烁,是用两片联级扩展。

 

把HC595改到LS595不知道是否要好些,或者在595和MCU中间增加 CD4093来整形。两款样品现在还在申请中。