SN74HCS7266/SN74HCS7266-Q1 2-Input XNOR Gates Texas Instruments SN74HCS7266/SN74HCS7266-Q1 Automotive Quadruple 2-Input XNOR Gates contains four independent 2-input XNOR Gates with Schmitt-trigger inputs. Each gate performs the Boolean function Y = A + B in positive logic. The Texas Instruments SN74HCS7266-Q1 devices are AEC-Q100 qualified for automotive applications.