Hello,
according to the datasheets of the SN74AUP3G17 (triple buffer) and SN74AUP3G14 (triple inverter) a max. input transition rise/fall rate of 200ns/V is recommended, although these devices feature Schmitt trigger inputs. For the single gate (SN74AUP1G17 / SN74AUP1G14) and dual gate versions (SN74AUP2G17 / SN74AUP2G14) there is no such requirement.
Question: Is this just a copy&paste error for the triple buffer/inverter from the datasheets of the non-Schmitt trigger versions SN74AUP3G34 / SN74AUP3G14? Or can there occur such an excessive cross current when all 3 inputs are within the transition region, that the device could be damaged?
