MCP39F521 Breakout

MCP39F521 I2C Energy-Metering Breakout

This assembled, breadboard-friendly breakout gives firmware and hardware developers a practical way to prototype with Microchip's MCP39F521 power and energy monitoring ASIC without buying a full evaluation kit.

Why use this board?

• Native I2C interface: integrate energy measurements without consuming a dedicated UART.
• Designed for multi-circuit systems: place multiple MCP39F521 devices on one I2C bus and scale further with an I2C multiplexer.
• Breadboard-friendly development: bring the metering IC into firmware prototypes and custom sensor front ends quickly.
• Open hardware: design resources are available at github.com/whatnick/MCP39F521_Breakout.

Volume pricing for multi-channel prototypes

Use one board for firmware bring-up, two boards for dual-circuit development, or four or more boards for multi-channel I2C systems. Automatic tier pricing is available for quantities of two and four.

Important safety note

This is a development breakout, not an isolated mains measurement appliance. External isolated current and voltage sensing, protection, calibration, and safe laboratory practices are required for any high-voltage application.