Ultra-Low-Power 32-Bit Microcontrollers (MCUs)

Our ultra-low-power, 32-bit Arm® Cortex®-M4 with FPU-based microcontrollers are built to run any application you can imagine—in places where you wouldn’t dream of sending other ultra-low-power MCUs. They’re as smart as they are power efficient, combining the biggest embedded memories of any MCUs in their class with our premier power technology. Now you can design smarter products without running out of code space or battery life. And with the most advanced cybersecurity ever, you’ll be ready for any threat you encounter.

Perfect for applications that require:

  • Crazy-long battery life: Lowest retention mode power (maintains 512KB for 3.5µW) and active mode power (as low as 45µW/MHz)
  • Near infinite code space: Largest memories (up to 3MB flash)
  • Ninja-like security: Options that support cryptographic algorithms

Ultra-Low-Power Microcontroller (MCU) Featured Products


MCUs Flash SRAM Core Clock Speed (MHz) Actual Active Mode Power (µW/MHz) Retention Mode Power (µW) Cryptographic Features
MAX32621 2MB 256KB 96 127 2.6 AES-128, 192, 256; DSA/RSA to 2048; TRNG; Secure Boot
MAX32626 512KB 160KB 120 127 2.4 AES-128, 192, 256; DSA/RSA to 2048; TRNG; Secure Boot
MAX32632 2MB 512KB 96 127 3.5 AES-128, 192, 256; DSA/RSA to 2048; TRNG; Secure Boot
MAX32651 3MB 1MB 120 104 1.6** AES-128, 192, 256; DSA/RSA to 4096; TRNG; Secure Bootloader
MAX32660 256KB 96KB 96 45* 2.8

*When operating at 0.9V with Fmax 24MHz
**With 32KB SRAM maintained

Consider power instead of current. Read the white paper: Powering the Next Generation of Smart Devices

Ultra-Low-Power Microcontroller (MCU) Development Boards

Quickly get up and running with microcontroller development boards that let you explore every feature of our ultra-low-power MCUs. Drop our prototyping boards right into your own project and start developing code. Code development is made easy with prototyping environments such as Mbed® and Arduino® plus full-featured IDEs such as GCC/Eclipse™.

Development Platform for the MAX32660 Arm® Cortex®-M4F MCU


Ultra-low power with 256KB flash and 96KB RAM for application and sensor code in a tiny, easy-to-use board.

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Development Platform for the MAX32630 Arm Cortex®-M4F MCU


Ultra-low power for wearables with 2MB flash, 512KB SRAM, and peripherals in a small, easy-to-use board.

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Arm® Mbed-Enabled Development Platform for the MAX32625 ARM Cortex®-M4F MCU


Includes prototyping area, Arduino-compatible connectors, 512KB flash, 160KB SRAM, USB interface, and GPIO devices.

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Development Platform for the MAX32625 Arm® Cortex®-M4F MCU


Ultra-low-power with on-board PMIC, 512KB flash, and 160KB SRAM in a tiny 0.6in x 1.0in dual-row header board.

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Development Platform for the Ultra-Low Power Microcontroller for Wearables


Power-optimized Arm® Cortex®-M4F. Optimal Peripheral Mix Provides Platform Scalability. On-Board Bluetooth® 4.0 BLE Transceiver with Chip Antenna.

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Ultra-Low-Power Microcontroller (MCU) Design Resources

Design Tools

White Papers