日: 2026年2月9日

Vcc vs Vdd: Differences, Usage, and Best Practices in Modern Electronics

This article is a detailed guide on Vcc vs Vdd power rail naming conventions in analog and digital circuits (CMOS vs bipolar), with practical tips for schematics, PCB layout, and IC selection! Printed Circuit Board (PCB) Introduction In modern electronics, understanding power supply terminology is critical for accurate circuit design and analysis. The most frequently encountered terms are Vcc and Vdd, both of which refer to voltage supply rails but differ significantly in context and application. The distinction between Vcc vs Vdd reflects the underlying transistor technology (BJT vs. MOSFET) and impacts everything from schematic labeling to voltage regulation strategies. Ultimately, a clear understanding of Vcc vs Vdd contributes to more robust and reliable electronic designs. In this article, we’ll explore the technical differences […]