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LM393 输入范围问题 求助~~

Other Parts Discussed in Thread: LM393

看LM393的资料上有这样一段注释:

The upper end of the common-mode voltage

range is V

CC+ − 1.5 V for the inverting input (−), and the non-inverting input (+) can exceed the VCC level; the comparator provides a proper output

state. Either or both inputs can go to 30 V without damage.

感觉不是很清楚,求解释。。

两个使用情况:

假设Vcc=5V

1.   V+ = 1.5V     V-  = 0~25V

2.   V-  =  1.5V    V+ =  0~25V

是不是说第1种是不可以的。。V- 必须小于Vcc-1.5V = 3.5V ?

谢谢了~~~~