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比较器不用引脚如何处理

Other Parts Discussed in Thread: LM393

想请问一下,比较器不用的引脚如何处理比较好

前段时间看了一个国外比较老的板子,他将比较器不用引脚处理成如下,

 

 总感觉有点怪怪的,请专家给点意见,如何处理比较好