se555定时器当触发输入为<1/3VDD是,阈值输入为>2/3VDD是SR锁存器处于不确定状态,是否与手册中功能表相矛盾????
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se555定时器当触发输入为<1/3VDD是,阈值输入为>2/3VDD是SR锁存器处于不确定状态,是否与手册中功能表相矛盾????