Ultra-Low Power Biometric Sensor Hub

Low power sensor hub family which seamlessly communicates with several Maxim Bio-metric Sensors

Please check latest availability status for a specific part variant.


MAX32664 is a sensor hub family with embedded firmware and algorithms for wearables. It seamlessly enables customer desired sensor functionality, including communication with Maxim’s optical sensor solutions and delivering raw or calculated data to the outside world. This is achieved while keeping overall system power consumption in check.

The MAX32664 Version A supports the MAX30101/MAX30102 high-sensitivity pulse oximeter and heart rate sensor for wearable health for finger-based applications.

The MAX32664 Version B supports the MAX86140/MAX86141 for wrist-based monitoring.

The sensor hub interface provides a fast-mode, I2C slave interface to a microcontroller host. A second I2C interface is dedicated to communicating with sensors.

The tiny form factor (1.6mm x 1.6mm 16-bump WLP) allows for integration into extremely small application devices.

MAX32664: Simplified Block Diagram MAX32664: Simplified Block Diagram Enlarge+

Key Features

  • Biometric Sensor Hub Solution Enables Faster Time to Market
  • Finger-Based (Version A) Algorithms Measure
    • Pulse Heart Rate
    • Pulse Blood Oxygen Saturation (SpO2)
  • Both Raw and Processed Data Are Available
  • Basic Peripheral Mix Optimizes Size and Performance
    • One Slave I2C for communication to a host microcontroller
    • One Master I2C for communication with sensors
    • 32.768kHz RTC
    • FIFO provides minimal host processor interaction
    • Secure, Authenticated Firmware Upgrades
Part NumberMCU CoreCore Clock Speed
Data ProcessingInternal Flash
Internal SRAM
UARTsSPI BusI2C BusGPIO PinsPWMTimer FeaturesPackage/PinsBudgetary
maxmaxSee Notes
MAX32664 ARM Cortex-M4F9632-bit25696222 Master/Slave143
Wake Up Timer
$2.23 @1k
See All Microcontrollers (59)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Technical Documents

App Note 6806 MAX32664 User Guide

Quality and Environmental Data

Request Reliability Report for: MAX32664 
Lead-Free Package Tin (Sn) Whisker Reports

Additional Resources

Getting a Finger on the Pulse of Well-Being

Accurate, Wrist-Based Heart-Rate Monitoring—Six Months Faster

CAD Symbols and Footprints

  • MAX32664GWEA+
  • MAX32664GWEA+T
  • Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

    Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

    Quality Management System >
    Environmental Management System >


    Related Resources

    Integrated Photoplethysmogram and Electrocardiogram Bio-Sensor Module For Mobile Health

    • Electrocardiogram (ECG) Optimized for Dry Electrode Operation
    • Reflective Heart Rate Monitor and Medical-Grade Pulse Oximeter
    • Miniature 3.3mm x 5.6mm x 1.3mm 22-pin Optical Module

    Type ID PDF Title
    App Note 6806 MAX32664 User Guide