Semiconductor integrated circuit device

摘要

A common power source line has first power supply points and second power supply points. The first power supply points are provided for supplying electric power to buffer circuits of low-frequency signal pads, while the second power supply points are provided for buffer circuits of high-frequency signal pads. A wiring distance from a power source pad to the second power supply points as well as a wiring distance from the first power supply points to the second power supply points are set to be relatively long in an overall wiring arrangement on a chip.