IC Chip and Circuit System Using the Same

A circuit system including a first IC chip arranged in a first voltage region on a circuit board, and a second IC chip arranged in a second voltage region on the circuit board, each of the first IC chip and the second IC chip including a data communication unit to wirelessly transmit/receive data and a power transmission/reception unit to wirelessly transmit/receive power. The first IC chip and the second IC chip wirelessly transfer data and power to each other in an insulated state between the first voltage region and the second voltage region.