Abstract: A cell includes a plurality of fin transistors formed in a semiconductor substrate. In the cell, a fin serving as a source and drain of each of the plurality of fin transistors is arranged in plurality at a first pitch in a first direction. Moreover, the cell height that is the length in the first direction of the cell is an n multiple (n is an integer) of half the length of the first pitch. Wires are connected to the cell, and are arranged at a second pitch, which is a 1/m multiple (m is an integer) of the cell height in the first direction.

Abstract: A power clamp circuit for preventing unnecessary power supply leak current at a tolerable power supply noise level. A reference voltage circuit generates a reference voltage by reducing a positive voltage supplied from a first power supply terminal by a predetermined potential and supplies the reference voltage to a buffer circuit. The buffer circuit activates a transistor functioning as a clamp element based on the reference voltage to short-circuit the first and second power supply terminals.