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  2. Processors and Microcontrollers
  3. Microcontrollers
  4. Ultra Low Power Microcontrollers
  5. MAX32655


Features and Benefits

  • Ultra-Low-Power Wireless Microcontroller
    • Internal 100MHz Oscillator
    • Flexible Low-Power Modes with 7.3728MHz System Clock Option
    • 512KB Flash and 128KB SRAM
      • Optional ECC on One 32KB SRAM Bank
    • 16KB Instruction Cache 
  • Bluetooth 5.2 LE Radio
    • Dedicated, Ultra-Low-Power, 32-Bit RISC-V Coprocessor to Offload Timing-Critical Bluetooth Processing
    • Fully Open-Source Bluetooth 5.2 Stack Available
    • Supports Medical Body Area Network (MBAN) andMesh
    • High-Throughput (2Mbps) Mode
    • Long-Range (125kbps and 500kbps) Modes
    • Rx Sensitivity: -97dBm; Tx Power: +5.5dBm•
    • Single-Ended Antenna Connection (50Ω)
  • Power Management Maximizes Battery Life
    • 2.0V to 3.6V Supply Voltage Range
    • Integrated SIMO Power Regulator
    • 12.9μA/MHz Active Current at 3.0V
    • 1.53μA at 3.0V Retention Current for 32KB•
    • Selectable SRAM Retention + RTC in Low-Power Modes
  • Multiple Peripherals for System Control
    • Up to Two High-Speed SPI Controller/Target
    • Up to Three I2C Controller/Target•
    • Up to Four UARTs
    • Up to One I2S Controller/Target
    • Up to 8-Input, 10-Bit Sigma-Delta ADC 7.8ksps
    • Up to Four Micro-Power Comparators
    • Timers: Four 32-Bit, Two Low Power, OneWatchdog, One Low-Power Watchdog
    • 1-Wire® Controller
    • Up to Four Pulse Train (PWM) Engines
    • RTC with Wake-Up Timer
    • Up to 52 GPIOs
  • Security and Integrity​
    • Optional Secure Boot
    • TRNG Seed Generator
    • AES 128/192/256 Hardware Acceleration Engine

Product Details

The MAX32655 microcontroller (MCU) is an advanced system-on-chip (SoC) featuring an Arm® Cortex®-M4F CPU for efficient computation of complex functions and algorithms that is qualified to operate at a temperature range of -40°C to +105°C. The SoC integrates power regulation and management with a single inductor multiple-output (SIMO) buck regulator system. The latest generation Bluetooth® 5.2 Low Energy (LE) radio is on board, supporting long-range (coded) and high-throughput modes and medical body area network (MBAN).

The device offers large onboard memory with 512KB flash and 128KB SRAM, with optional error correction coding (ECC) on one 32KB SRAM bank. This 32KB bank can be optionally retained in BACKUP mode. An 8KB user OTP area is available.

The MAX32655 supports multiple high-speed peripherals, such as I2C, 50MHz SPI, and UART, plus one I2S port for connecting to an audio codec. An eight-input, 10-bit ADC is available to monitor analog input from external analog sources. In addition, a low-power UART (LPUART) is available for operation in the lowest power sleep modes to facilitate wake-up activity without any data loss. A total of six timers with I/O capability are provided, including two low-power timers to enable pulse counting, capture/compare, and pulse-width modulation (PWM) generation, even in the lowest power sleep modes.

The MAX32655 is available in an 81 CTBGA package (8mm x 8mm, 0.8mm pitch)


  • Asset Tracking
  • Fitness/Health and Medical Wearables
  • Hearables
  • Industrial Sensors
  • Wireless Computer Peripherals and I/O Devices

Product Lifecycle icon-recommended Recommended for New Designs

This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.

Evaluation Kits (3)

Reference Designs (1)

Product Recommendations

MAX32655 Companion Parts

Recommended Related Parts

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.

Part Number Material Declaration Reliability Data Pin/Package Drawing CAD Symbols, Footprints & 3D Models
MAX32655GXG+ Material Declaration Reliability Data 81-CSP_BGA-8X8X1.17
MAX32655GXG+T Material Declaration Reliability Data 81-CSP_BGA-8X8X1.17
Wafer Fabrication Data MAX32655 Reliability Data

Sample & Buy

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Buy Now Pricing

(**) Displayed Buy Now Price and Price Range is based on small quantity orders.


List Pricing

(*)The 1Ku list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.


Lead Times

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Price Table Help


Evaluation Boards

Pricing displayed is based on 1-piece.

Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.

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.