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SN74HC595: 技术咨询

Part Number: SN74HC595
Other Parts Discussed in Thread: CD74HC74, SN74HC14

您好:

CD74HC74这类D触发器它们的时钟引脚输入的时钟如果过缓的话,可能会导致芯片损坏?如果 可能损坏的原因是如下面所说的情况吗?

输入信号电平INx在中间电压值时,可能导致下图中两个MOS都导通,以至于损坏芯片。 附图是我从其他CMOS芯片手册上截取的(CD74HC74内部输入端的等效电路应该也与这个类似吧)。

       我记得CD74HC74是有VILVIH的最低和最高的电平要求的,所以想确认下CLK输入过缓,及输入值在VIHVIL之间时,是否会损坏板卡?