an input/output (I/O) interface configured to couple to a load device;

a first power interface configured to provide a first power supply for transmitting data via the I/O interface;

a transmitter circuit coupled to the I/O interface and to the first power interface, the transmitter circuit configured to be powered by the first power supply and to provide an output signal to the load device via the I/O interface in a transmitter mode; and

a switching unit coupled to the first power interface, the switching unit configured to switch off the first power interface for the transmitter circuit in accordance with a determination, from the driver device, that the transmitter circuit is operating in a low power state, wherein the transmitter circuit has a power consumption level below a threshold power level in the low power state.