Darwin Ultra-Low-Power Microcontrollers

DARWIN is the name we give to our extensive range of Arm® microcontrollers, which are designed to provide maximum performance with minimal power consumption. This range of highly integrated, secure, ultra-low-power microcontrollers provide a choice of memory size and cores, giving you the flexibility to pick the microcontroller that best suits your application. Notable features of this range of ultra-low-power microcontrollers include:


  • Wearables
    The ultra-low-power active/retention modes (SRAM maintained) of the MCUs maximize the uptime of battery-powered devices
  • Smart/Autonomous Devices
    With up to 3MB flash, 1MB SRAM, and a scalable memory architecture, these ultra-low-power microcontrollers are capable of storing, processing, and acting on the vast amounts of data used by these devices.
  • Security
    Using a modular arithmetic accelerator (MAA) with a hardware entropy source for advanced security features (AES, ECDSA, RSA, DSA, TRNG) while providing support for secure boot loading, the level of security provided by these microcontrollers is comparable to those used by financial and government institutions.
  • Multi-Tasking
    These ultra-low-power microcontrollers have a dual-core MCU option which provide ample processing power for high-performance multitasking.
  • IoT
    Integrated BLE 5.0 allows interconnection of devices without needing to rely on a separate chip.

Ultra-Low-Power Arm 32-Bit MCUs 

Darwin Features Enlarge+

Ultra-Low-Power Microcontroller Featured Products

Part Number Flash SRAM No. of GPIOs Active Current (µA/MHz) Standby Current (µA)[1] Security Features Buy EV Kit Sample
MAX32621 Up to 2MB 256kB Up to 49 102 @ 1.2V 0.7 @ 1.8V
1.1 @ 1.2V
  • Low retention power
  • Memory lite variants available
  • Memory expansion interfaces
Buy Buy Sample
MAX32626 Up to 512kB Up to 160kB Up to 40 106 @ 1.2V AES, TPU[2], Secure Boot Buy Buy Sample
MAX32632 2MB 512kB Up to 66 106 @ 1.2V 0.6 @ 1.8V
1.9 @ 1.2V
AES, TPU[2], Secure Boot Buy Buy Sample
MAX32651 3MB 1MB Up to 105 95 @ 1.1V 0.9 @ 1.8V[5] AES, TPU[2], Secure Bootloader
  • High-speed peripherals
  • Fast clock speed (120MHz)
Buy Buy Sample
MAX32660 Up to 256kB Up to 96kB Up to 14 50 @ 0.9V[4] 1.9 @ 1.8V  
  • Tiny package
  • UART/SPI/I2C bootloader
Buy Buy Sample
MAX32666 1MB Up to 560kB Up to 48 27 @ 3.3V 6.3 @ 3.3V[5] AES, TPU[2], Secure Bootloader
  • BLE 5.0
  • Integrated SIMO
  • Dual core
Buy Buy Sample
MAX32670 384kB 160kB Up to 31 44 @ 1.8V[3] 3.0 @ 1.8V AES, TPU[2], Secure Bootloader
  • Error Correcting Code (ECC)
  • Integrated LDO
Buy Buy Sample

[1] RTC enabled and SRAM retained.
[2] TPU = Trust Protection Unit with encryption and advanced security features.
[3] Running at 12MHz.
[4] Running at 24MHz.
[5] 32kB of SRAM retained.

Ultra-Low-Power Microcontroller Development Boards

Our microcontroller development boards allow you to quickly get up and running so that you can spend less time debugging and more time exploring the features of our ultra-low-power MCUs. Our prototyping boards can be easily integrated into your own product development projects. Code development is made easy with prototyping environments such as Mbed® and Arduino® plus full-featured IDEs such as GCC/Eclipse.

Evaluation Kit for MAX32665/MAX32666/ MAX32667/MAX32668


Platforms to evaluate the MAX32665/MAX32666 high-efficiency Arm® microcontroller and audio DSP for wearable and hearable device applications.

Learn More ›

Evaluation Kit for MAX32650/MAX32651/MAX32652


Platform to evaluate the MAX32650 ultra-low-power memory-scalable microcontroller designed specifically for high-performance, battery-powered applications.

Learn More ›

Evaluation System for the MAX32660


Compact development platform that provides access to all the features of the MAX32660 in a tiny, easy-to-use board.

Learn More ›

Compact Development Board to Build Small, Power-Optimized IoT Applications


Power-optimized Arm Cortex-M4F. Optimal peripheral mix provides platform scalability. On-board Bluetooth 4.0 BLE transceiver with chip antenna.

Learn more ›

Ultra Compact Development Board Fits in the Tightest Spaces, Reduces Power


Power-optimized Arm® Cortex®-M4F. On-board PMIC provides all necessary voltages. Ultra-compact 0.6in x 1.0in dual-row header footprint.

Learn more ›

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.

Learn more ›

Ultra-Low-Power Microcontroller Design Resources

Design Tools

White Papers


Customer Testimonials


Ultra-Low-Power Microcontroller Tools Supported