Analog Devices Inc./Maxim Integrated MAX32626IWY+T

Overview

MAX32626IWY+T from Maxim Integrated is an ultra-low-power Arm® Cortex®-M4 with FPU microcontroller designed for wearable and IoT edge nodes. It integrates 512KB flash, 160KB SRAM, 8KB instruction cache, hardware AES-128/192/256, and a Trust Protection Unit (TPU) with modular arithmetic accelerator - enabling secure sensor hub and medical patch applications with sub-μA sleep current and 5μs wake-up from LP1 mode.

For engineers reviewing the MAX32626IWY+T datasheet, MAX32626IWY+T pinout, MAX32626IWY+T application, or MAX32626IWY+T equivalent, key selection criteria include its dual-clock architecture (96MHz/4MHz), 10-bit delta-sigma ADC at 7.8ksps, full-speed USB 2.0 with internal transceiver, and TPU-enabled ECDSA acceleration for firmware authentication and secure boot.

Technical Context

The MAX32626IWY+T implements a tightly coupled AHB/APB bus matrix supporting concurrent execution from cache and flash, with dynamic clock and power gating managed by an intelligent Peripheral Management Unit (PMU). Its low-power operation spans four distinct modes: LP0 (600nA RTC-active), LP1 (2.56μW data retention, 5μs wake-up), LP2 (27μA/MHz), and LP3 (106μA/MHz active from cache).

Security is enforced via a dedicated Trust Protection Unit (TPU) featuring a modular arithmetic accelerator (MAA) for fast ECDSA signature generation, a true random number generator (TRNG), and a secure boot loader that validates firmware integrity before execution - all isolated from the main CPU domain.

Key Specifications

Pinout & Package

MAX32626IWY+T is housed in a 63-ball Wafer-Level Package (WLP), 3.3mm × 3.3mm, 0.4mm pitch, with 40 general-purpose I/O pins supporting multiple shared functions including GPIO, UART, SPI, I²C, PWM, and ADC inputs. The package provides minimal footprint for space-constrained wearables and conforms to JEDEC J-STD-020 moisture sensitivity level 3.

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 nRF52840-QIAA and STM32L4R9VIT6, the MAX32626IWY+T delivers superior ultra-low-power performance in retention modes (2.56μW LP1), integrated USB PHY, and hardware-enforced secure boot - making it optimal for battery-constrained, regulated medical wearables requiring tamper-resistant firmware execution.

Availability

MAX32626IWY+T is available at Aetrix Electronics and suitable for sports watches, wearable medical patches, and portable diagnostic devices requiring stable component supply, long-term lifecycle support, and traceable sourcing for FDA-regulated production.

Supply support for MAX32626IWY+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 semiconductor solutions for industrial, healthcare, and communications markets.

The MAX32626IWY+T belongs to the DARWIN family of ultra-low-power MCUs engineered specifically for secure, battery-operated IoT endpoints - emphasizing wearable-grade energy efficiency, robust hardware security, and scalable memory architecture.

FAQ

What is the maximum system clock frequency supported by the MAX32626IWY+T?

The MAX32626IWY+T supports a maximum system clock frequency of 96MHz from its internal relaxation oscillator, factory-trimmed to ±0.25% for USB compliance. This frequency is fully operational across the -30°C to +85°C temperature range and enables high-throughput sensor processing while maintaining ultra-low-power efficiency in active modes.

Does the MAX32626IWY+T include hardware support for secure boot?

Yes, the MAX32626IWY+T includes a dedicated secure boot loader that validates firmware signatures using ECDSA prior to execution. This functionality is enforced by the Trust Protection Unit (TPU) and cannot be bypassed - ensuring only cryptographically authenticated code runs on the device, a critical requirement for wearable medical certification.

What are the key differences between the MAX32626IWY+T and the MAX32625IWY+T?

The MAX32626IWY+T includes the Trust Protection Unit (TPU) with modular arithmetic accelerator (MAA), true random number generator (TRNG), and secure boot loader - features absent in the MAX32625IWY+T. Both share identical core specs (512KB flash, 160KB SRAM, 96MHz CPU), but only the MAX32626IWY+T meets stringent hardware-rooted security requirements for regulated medical applications.

Can the MAX32626IWY+T operate from a single 3.3V supply?

No - the MAX32626IWY+T requires three independent supplies: 1.2V for the core (VDD12), 1.8V for digital I/O (VDD18), and 3.3V for the USB PHY (VDDB). While VDDIO/VDDIOH can accept 1.8–3.3V, the core regulator must be supplied separately; using a single 3.3V rail would violate absolute maximum ratings and prevent proper operation of the Cortex-M4 core.

What is the wake-up time from the lowest power mode on the MAX32626IWY+T?

The MAX32626IWY+T achieves a 5μs wake-up time from Low Power Mode 1 (LP1), which retains full SRAM and register contents at just 2.56μW. This rapid transition from deep retention sleep to full 96MHz operation enables responsive capture of infrequent but critical biosignal events - such as R-wave detection in ECG - without compromising energy efficiency.