An apparatus for performing signal driving with aid of MOSFET and an associated IC are provided, where the apparatus includes a PMOSFET coupled between a predetermined voltage level and a terminal, and further includes an NMOSFET coupled between the predetermined voltage level and the terminal. The PMOSFET is arranged for selectively driving a signal that passes through the terminal. In addition, the NMOSFET is arranged for selectively driving the signal. Additionally, the apparatus further includes another NMOSFET coupled between another predetermined voltage level and the terminal, wherein the other NMOSFET is arranged for selectively driving the signal. More particularly, the PMOSFET, the NMOSFET, and the other NMOSFET does not drive the signal at the same time. For example, each of the PMOSFET, the NMOSFET, and the other NMOSFET selectively drives the signal to have one of a plurality of logical states.