Analog Devices Inc./Maxim Integrated MAX32625IWY+T

Overview

MAX32625IWY+T from Maxim Integrated is an ultra-low-power Arm® Cortex®-M4 with FPU microcontroller designed for wearable and IoT edge nodes. It features 512KB flash, 160KB SRAM, 96MHz/4MHz dual-frequency internal oscillators, 10-bit delta-sigma ADC (7.8ksps), and hardware AES-128/-192/-256 encryption-enabling secure, always-on physiological monitoring in sports watches and medical patches.

For engineers reviewing the MAX32625IWY+T datasheet, MAX32625IWY+T pinout, MAX32625IWY+T application, or MAX32625IWY+T equivalent, key selection criteria include LP0 mode current (600nA with RTC), 5μs wake-up from LP1 sleep, USB 2.0 full-speed device support with integrated transceiver, and flexible I/O voltage (1.8V–3.3V) for mixed-signal sensor interfacing.

Technical Context

The MAX32625IWY+T implements a scalable memory architecture with 8KB instruction cache and SPIX engine for external flash expansion. Its intelligent PMU enables dynamic clock gating and four low-power modes (LP0–LP3), where LP1 retains full SRAM data at 2.56μW while supporting sub-5μs wake-up to 96MHz operation.

It integrates a 10-bit delta-sigma ADC with selectable references (0.05V–5.5V input range), six 32-bit timers, sixteen PWM engines, three SPI masters, two I²C masters, three UARTs, and 1-Wire master-all accessible via up to 40 GPIO pins with individually configurable VDDIO/VDDIOH supplies and Schmitt-trigger inputs.

Key Specifications

Pinout & Package

MAX32625IWY+T is packaged in a 63-ball Wafer-Level Package (WLP), 0.4mm pitch, 3.3mm × 3.3mm footprint, suitable for space-constrained wearables. Pin functions are defined per the official MAX32625/MAX32626 Pin Description table (Rev 6, pp.16–19).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-low-power Arm Cortex-M4 microcontroller applications.

Compared with Nordic nRF52840-QIAA and TI MSP432E401Y, MAX32625IWY+T delivers the lowest deep-sleep current (600nA LP0), integrated USB 2.0 device PHY, and smallest WLP footprint-making it uniquely suited for battery-limited, USB-configurable, and space-constrained medical wearables.

Availability

MAX32625IWY+T is available at Aetrix Electronics and suitable for sports watches, fitness monitors, and wearable medical patches requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for MAX32625IWY+T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Maxim Integrated (now part of Analog Devices) designs precision analog, mixed-signal, and high-reliability ICs for automotive, industrial, and healthcare applications.

The MAX32625/MAX32626 DARWIN family targets ultra-low-power wearable and IoT endpoints, emphasizing battery longevity, cryptographic security, and sensor integration without external support components.

FAQ

What is the maximum operating frequency of the MAX32625IWY+T CPU core?

The MAX32625IWY+T features an Arm Cortex-M4 with FPU core that operates at up to 96MHz using its internal relaxation oscillator. This frequency is factory-trimmed to ±0.25% for USB compliance and can be dynamically switched to a 4MHz low-power oscillator for extended battery life in always-on monitoring tasks. The 96MHz clock drives full-performance execution from cache or flash memory.

Does the MAX32625IWY+T support USB device functionality without external components?

Yes, the MAX32625IWY+T integrates a full-speed USB 2.0 device controller with a physical transceiver, eliminating the need for external PHY or level-shifters. It supports standard USB device classes including CDC, HID, and MSC, and provides a dedicated 3.3V ±5% VDDB supply rail. The DP pin includes an internal 1.5kΩ pull-up resistor for automatic enumeration as a USB device upon connection.

How does the MAX32625IWY+T achieve ultra-low power consumption in standby mode?

The MAX32625IWY+T achieves 600nA standby current (LP0 mode) with RTC enabled by powering only the real-time clock module and retention regulator from VDD12, while shutting down all other domains-including CPU, flash, SRAM, and peripherals. Its LP1 mode retains full 160KB SRAM content at just 2.56μW and wakes in 5μs, enabling rapid response to sensor interrupts without data loss or boot delay.

Can the MAX32625IWY+T interface with both 1.8V and 3.3V peripherals simultaneously?

Yes, the MAX32625IWY+T supports concurrent 1.8V and 3.3V peripheral interfacing via its dual I/O supply architecture: VDDIO (1.71V–3.6V) and VDDIOH (≥VDDIO). Each GPIO pin can be individually assigned to either supply, allowing direct connection to 1.8V sensors and 3.3V communication ICs without level shifters. Input thresholds scale with the selected supply, ensuring noise-immune logic compatibility.

What ADC performance specifications does the MAX32625IWY+T provide for biomedical sensing?

The MAX32625IWY+T integrates a 10-bit delta-sigma ADC with 58.5dB SNR, ±2 LSB INL, and 7.8ksps sample rate-meeting AAMI EC11 requirements for diagnostic-grade biosignal acquisition. Its input range supports 0.05V–5.5V (AIN0/AIN1 with internal divider), enabling direct connection to photodiode amplifiers and ECG front-ends. The ADC also features programmable gain, buffer bypass, and hardware averaging to optimize resolution for low-amplitude physiological signals.