Patent ID: 6677781
Filing Date: 2004-01-13
Classification: H01L

Abstract:
A semiconductor integrated circuit device comprising:at least one power source pad provided on a chip; a plurality of signal pads provided on said chip; at least one common power source line extending from said power source pad on said chip; buffer circuits provided for said signal pads; and power supply points of said common power source line for supplying electric power to said buffer circuits, wherein said power supply points are classified into first power supply points for the buffer circuits of low-frequency signal pads and second power supply points for the buffer circuits of high-frequency signal pads, said low-frequency signal pads being used for inputting and outputting signals having relatively low frequency components while said high-frequency signal pads being used for inputting and outputting signals having relatively high frequency components, and a wiring distance from said power source pad to said second power supply points as well as a wiring distance from said first power supply points to said second power supply points are set to be relatively long in an overall wiring arrangement on said chip.