SN74HCS126/SN74HCS126-Q1 Quadruple Bus Buffer Texas Instruments SN74HCS126/SN74HCS126-Q1 Quadruple Bus Buffer contains four independent buffers with 3-state outputs and Schmitt-trigger inputs. Each buffer performs the Boolean function Y = A in positive logic. The outputs can be put into a Hi-Z state by applying a Low on the OE pin. The Texas Instruments SN74HCS126-Q1 devices are AEC-Q100 qualified for automotive applications.