Disclosed herein is a driver circuit including a first group of transistors provided between first and second nodes and including n of the transistor(s) where n is equal to or greater than one, and a second group of transistors provided in parallel with the first group of transistors and including m of the transistor(s) where m is equal to or greater than one and not equal to n, the m transistors being connected together in series. The n-channel transistor in the first group and at least one of the two n-channel transistors in the second group have their gate connected to an input node.