The TMUX121 is an analog high-speed mux or demux that can be used for routing differential as well as single ended signals through it. The device can be used for many interfaces including I²C and I³C.

An available GPIO pin of a controller or hard tie to voltage level H or L can easily control the mux or demux selection pin (SEL) of the device as an application requires. The switch path is passive and therefore bidirectional.