Semiconductor integrated circuit device with reduced coupling noise

摘要

To a first signal line to which a signal with a comparable small amplitude against the power supply voltage is transmitted at a first timing, a second signal line to which a voltage maintained at a constant is transmitted at the first timing is laid out on the same wiring layer as that of the first signal line adjacently to each other. Thereby, the invention reduces the coupling noises without impairing a high density of the signal wirings, and provides a semiconductor integrated circuit device with a memory circuit that realizes a high integration, low power consumption, and high speed.