TPD4S009 and TPD4S010 are passive TVS diodes and so there is no requirement to power them. They are fully functional without any power supply. However, TPD4S009 does provide an option to apply a DC voltage to its V_CC pin, whose purpose is to bias the internal central clamp and insure a known voltage on all internal nodes during startup time. This feature is optional, and whether or not a DC voltage is applied to V_CC does not affect the ESD performance of this device.