Schmitt-trigger inverter for noise-prone signal lines
The SN74AHC14DRG3 is a hex inverter with Schmitt-trigger inputs, meaning each of its six channels has built-in hysteresis that cleans up slow or noisy edges on the input side — a common fix on board-level signal conditioning where a sensor output or a long trace picks up coupled noise.
10.6 ns propagation delay at 5 V, 50 pF
Maximum propagation delay is 10.6 ns at 5 V with a 50 pF load — that sets the data-rate ceiling for a clean edge at the receiver. At 3.3 V the delay stretches, so budget margin if the downstream latch expects a setup time under 8 ns. The Schmitt-trigger input thresholds are specified as 0.9 V to 1.65 V for low and 2.2 V to 3.85 V for high at 5 V, giving roughly 0.55 V of hysteresis — enough to suppress chatter from a slow-rising RC oscillator or a reed switch contact bounce.