TS3USBCA4 USB Type-C™ SBU Multiplexer Texas Instruments TS3USBCA4 USB Type-C™ SBU Multiplexer is a passive 4:1 (TS3USBCA420) and 3:1 (TS3USBCA410) MUX supporting various types of differential or single-ended signals. These signals are on the SBU1/SBU2 terminals of a USB Type-C connector to different interfaces. Those signals can be differential DisplayPort auxiliary (AUX), analog audio MIC and AGND, PCIe differential clock, or any other supported generic differential or single-ended signals.