Features and Benefits

  • MAX32666 Microcontroller
    • Dual Arm Cortex-M4F, 96MHz
    • 1MB Flash Memory
    • 560KB SRAM
    • 3 x 16KB Cache
    • Bluetooth 5 Low Energy Radio
    • High-Speed USB 2.0
    • Three QSPI Master/Slave
    • Three I2C Master/Slave
    • Three UARTS
    • SD/SDIO 3.0
    • 1-Wire® Master
    • 48 GPIO
    • 8 Input, 10-Bit ADC
  • MAX1555 1-Cell Li+ Battery Charger
    • Charge from USB
    • On-Chip Thermal Limiting
    • Charge Status Indicator
  • Expansion Connections
    • Breadboard Compatible Headers
    • 10-Pin Cortex Debug Header
    • Micro USB Connector
    • Micro SD Card Connector
  • Integrated Peripherals
    • RGB Indicator LED
    • User Pushbutton
    • 6-Axis Accelerometer/Gyro
    • Bluetooth Surface Mount Antenna
  • SWD/MAXDAP Debug Interface
    • Drag-and-Drop Programming
    • SWD Debugger
    • Virtual UART Console

Product Details

The MAX32666FTHR board is a rapid development platform to help engineers quickly implement battery optimized Bluetooth® 5 solutions with the MAX32666 Arm® Cortex®-M4 processor with FPU. The board also includes the MAX1555 1-Cell Li+ battery charger for battery management. The form factor is a small 0.9in by 2.0in dual-row header footprint that is compatible with breadboards and off-the-shelf peripheral expansion boards. The board also includes a variety of peripherals, such as a micro SD card connector, 6-axis accelerometer/gyro, RGB indicator LED, and pushbutton. This platform provides power-optimized flexible for quick proof-of-concepts and early software development to enhance time to market.


  • Connected Home
  • Gaming Devices
  • Hearables
  • Industrial Sensors
  • Payment/Fitness/Medical Wearables
  • Telemedicine


Pricing displayed is based on 1-piece.

Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.