A combined output driver for TMDS signals and LVDS signals. A first output driver includes a first differential unit generating a first differential according to first input signals in a first mode and a first clamping device coupled between the first node and the first differential unit to clamp potentials at two power terminals below a second power voltage. The second output driver includes a second differential unit generating a second differential signal according to second input signals in a second mode and a second clamping device to clamp potentials at two output terminals of the second differential unit below the second power voltage.
Dual-function drivers capable of outputting LVDS or TMDS differential signals by sharing output terminals under differential modes. In the dual-function driver, an input control unit receives a first input signal compliant with a first specification in a first mode and a second input signal compliant with a second specification in a second mode by sharing a pair of input terminals, and a current steering circuit comprises first and second differential pairs. The input control unit enables the first and second differential pairs to output a first differential signal compliant with the first specification through a pair of output terminals during the first mode, and the input control unit disables the first differential pair and enables the second differential pair to output a second differential signal compliant with the second specification on the pair of output terminals during the second mode.
