VCC vs VDD vs VSS: Meaning, Difference, and PCB Net Names
July 7, 2026
VCC and VDD usually mean the positive power rail. VSS usually means the lower power reference. In many simple CMOS circuits, VSS connects to GND.
VCC and VDD usually mean the positive power rail. VSS usually means the lower power reference. In many simple CMOS circuits, VSS connects to GND.
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