Embodiments of redrivers and resistive termination units for redrivers are disclosed. In an embodiment, a resistive termination unit for a redriver includes a resistor connected to an input/output terminal of the redriver, a first switch connected to the resistor and to a supply voltage of the redriver, a second switch connected to the first switch and configured to be turned on or off in response to a change in the supply voltage of the redriver, and a control circuit connected to the first switch through the second switch and configured to generate a control signal for the first switch.