JAJSP67T October 1995 – October 2023 SN54AHCT14 , SN74AHCT14
PRODUCTION DATA
6.9 Typical Characteristics
One common misconception is that the current consumption will be less when switching a slow signal into a Schmitt trigger. This is partly true because the Schmitt trigger prevents oscillation which can draw a lot of current; however, you will see higher ICC current due to the amount of time the input is not at the rail. This is Delta ICC. Delta ICC is where the inputs are not at the rails and upper or lower drive transistors are partially on. Figure 6-1 shows ICC across the input voltage sweep.
Figure 6-1 Supply Current vs Input Voltage