Patent ID: 8742793

Claim:
A semiconductor integrated circuit comprising: a plurality of circuit cells; a first main line to which a power supply voltage or a reference voltage is applied, the first main line extending in one direction; a second main line to which the same voltage with the first main line is applied, the second main line extending in a different direction perpendicular to the one direction; a plurality of branch lines extending in the different direction, each of the branch lines being shared by predetermined ones of the plurality of circuit cells disposed in the different direction; a power supply switch transistor for controlling connection and disconnection between the branch line and the second main line in response to a control signal input thereto; and an auxiliary line extending in the one direction, for connecting the plurality of branch lines to each other, wherein the second main line and the branch line are arranged in parallel with each other, and wherein the predetermined ones of the plurality of circuit cells are arranged both sides of the power supply switch transistor.