VCC5

VCC5 is a schematic and PCB net name commonly used in electronics to designate a regulated +5 volt power rail. It is part of the broader VCC family of supply nets, which are used to label positive voltage supplies in digital and mixed-signal circuits. In many designs, VCC5 coexists with other rails such as VCC3.3, VCC1.8, or VDD, depending on the voltage requirements of individual components.

The source of a VCC5 rail can vary. It may come from a dedicated 5V regulator, a USB supply, a battery with an appropriate regulator, or another power-management circuit. The rail typically powers microcontrollers, digital ICs, sensors, and peripheral devices that operate at around 5V. Some devices labeled to run at 5V may actually tolerate a broader range, so it is important to consult device specifications.

Best practices for VCC5 include providing proper decoupling near each IC, such as a 0.1 µF ceramic capacitor in parallel with larger bulk capacitors (e.g., 10 µF or higher), and ensuring a solid ground reference. Be mindful of current requirements and potential noise; route the supply with adequate trace width and consider separate analog and digital grounds if needed. Also note that naming conventions vary, and some designs may use VCC or VDD labels differently, so verification against actual voltages is essential.

In summary, VCC5 is a convention for a +5V supply rail in electronic schematics and boards, serving as a practical label rather than a universal standard.