TI – The voltage level at a transition-operated input that causes operation of the logic element according to specification, as the input voltage falls from a level above the positive-going threshold voltage, VT+.
TI – The voltage level at a transition-operated input that causes operation of the logic element according to specification, as the input voltage falls from a level above the positive-going threshold voltage, VT+.
输入电压从正向门限电压以上的电平VT–开始下降，跃变后的输入电平使得逻辑元素(单元)按照规范完成工作。