SN74HCS157/SN74HCS157-Q1 2-to-1 Multiplexers Texas Instruments SN74HCS157/SN74HCS157-Q1 2-to-1 Multiplexers contains four data selectors/multiplexers to select one of two data sources. All channels are controlled by the same address select (A/B) input and strobe (G) input. A high level at the strobe terminal forces all outputs low. The Texas Instruments SN74HCS157-Q1 devices are AEC-Q100 qualified for automotive applications.