the aip74hc/hct7014 is a hex buffer with precision schmitt-trigger inputs. the precisely defined trigger levels are lying in a window between 0.55×vcc and 0.65×vcc. it makes the circuit suitable to operate in a highly noisy environment. input shorts are allowed to -1.5v and 16v without disturbing other channels. inputs include clamp diodes that enable the use of current limiting resistors to interface inputs to voltages in excess of vcc. schmitt trigger inputs transform slowly changing input signals into sharply defined jitter-free output signals.