MAX32664GWEC+T

Overview

The MAX32664GWEC+T is a biometric sensor hub from the MAX32664 family, specifically Version C. It integrates embedded firmware and algorithms for wearable health monitoring, supporting finger-based (MAX30101/102), wrist-based (MAX86140/141), and ear-based (MAXM86161) applications. The device features a 1.6mm x 1.6mm WLP package with a supply voltage range of 1.71V to 3.63V. It includes a fast-mode slave I2C interface for host communication and a master mode SPI or I2C interface for sensors. Key electrical parameters include a system clock frequency of 96 MHz, an RTC operating current of 0.45 μA, and an operating temperature range of -40°C to +105°C.

Feature Summary

• Supports multiple biometric algorithms for heart rate, SpO2, and estimated blood pressure across finger, wrist, and ear form factors.
• Provides flexible sensor connectivity via dedicated master I2C or SPI interfaces alongside a slave I2C host port.
• Includes a bootloader for secure, authenticated firmware upgrades and a 32.768kHz RTC for low-power timekeeping.

Applications

• Wearable fitness trackers
• Hearables
• Wearable medical devices
• Portable medical equipment
• Mobile devices

Procurement Notes

Verify the specific version suffix 'C' in the part number to ensure compatibility with the intended sensor ecosystem, such as the MAXM86161 for ear-based applications. Confirm that the WLP-16 package code matches the required land pattern and footprint specifications for the target PCB design before finalizing procurement orders.

Selection Notes

Select this component when a compact sensor hub is needed for mixed-form-factor wearables requiring both wrist and ear support. The Version C variant offers dual interface options (SPI or I2C) for sensor communication, providing flexibility in system architecture compared to single-interface versions.

Part Context

The MAX32664GWEC+T belongs to the MAX32664 Ultra-Low Power Biometric Sensor Hub family. This family is designed to offload complex signal processing from the main microcontroller, enabling faster time-to-market for biometric applications while maintaining strict power consumption limits.

Replacement Considerations

Other members of the MAX32664 family, such as MAX32664GWEA+T (Version A) or MAX32664GWEB+T (Version B), may serve as alternatives if the application does not require ear-based support or specific interface configurations.

FAQ

What is the primary function of the MFIO pin on the MAX32664?

The MFIO pin acts as an output to alert the host when data is ready and serves as an input to enter bootloader mode when held low during a reset.

How does the MAX32664 Version C handle accelerometer data?

It supports directly connected accelerometers and allows feeding X, Y, and Z samples from a host-connected accelerometer for motion artifact compensation.

What are the supported sensor interfaces for Version C?

Version C provides either a master mode SPI interface or an I2C interface for communication with sensors, depending on the specific configuration.