Analog Devices Inc./Maxim Integrated MAX32626ITK+T

Overview

MAX32626ITK+T from Maxim Integrated is an ultra-low-power Arm® Cortex®-M4 with FPU microcontroller designed for wearable and IoT edge devices. It features 512KB flash, 160KB SRAM, 96MHz/4MHz dual-clock system, hardware AES-128/-192/-256, and a Trust Protection Unit (TPU) with modular arithmetic accelerator for ECDSA. It targets battery-constrained medical patches and sports watches requiring secure, always-on sensing.

For engineers reviewing the MAX32626ITK+T datasheet, MAX32626ITK+T pinout, MAX32626ITK+T application, or MAX32626ITK+T equivalent, key selection criteria include LP0 mode current (600nA with RTC), 10-bit delta-sigma ADC at 7.8ksps, USB 2.0 full-speed device interface with internal transceiver, and TPU-enabled secure boot-critical for regulated wearable medical designs.

Technical Context

The MAX32626ITK+T implements a dual-oscillator clock architecture: a high-performance 96MHz internal relaxation oscillator (trimmed to ±0.25% for USB compliance) and a low-power 4MHz RC oscillator for always-on monitoring. Its PMU supports four distinct low-power modes (LP0–LP3), with LP1 enabling 2.56μW data retention sleep and 5μs wake-up latency using the 96MHz clock source.

Security is hardware-rooted: the Trust Protection Unit integrates a modular arithmetic accelerator (MAA) optimized for ECC operations, a true random number generator (TRNG), and a secure boot loader that validates firmware signature before execution-ensuring tamper-resistant firmware integrity without software overhead.

Key Specifications

Pinout & Package

The MAX32626ITK+T is housed in a 68-pin TQFN-EP package (7mm × 7mm, 0.5mm pitch) with exposed thermal pad for enhanced power dissipation in space-constrained wearable assemblies.

Key Features

Applications

Equivalent & Alternatives

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

Compared with Nordic nRF52840-QIAA and TI MSP432E401Y, the MAX32626ITK+T uniquely combines sub-μA RTC-enabled sleep, hardware-accelerated ECDSA, and USB 2.0 with integrated PHY-making it the only option qualified for FDA-cleared, secure, USB-updatable wearable medical devices operating >1 year on a single coin cell.

Availability

MAX32626ITK+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 regulated markets.

Supply support for MAX32626ITK+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 secure microcontroller solutions for demanding industrial, medical, and automotive applications.

The MAX32626ITK+T belongs to the DARWIN family of ultra-low-power MCUs engineered specifically for energy-constrained, security-sensitive wearable and IoT endpoints-emphasizing battery longevity, hardware-rooted trust, and sensor-rich peripheral integration.

FAQ

What is the maximum system clock frequency supported by the MAX32626ITK+T?

The MAX32626ITK+T supports a maximum system clock frequency of 96MHz using its factory-trimmed internal relaxation oscillator. This oscillator is calibrated to ±0.25% tolerance to ensure USB 2.0 full-speed compliance. A secondary 4MHz RC oscillator is available for ultra-low-power monitoring tasks, and both clocks can be dynamically selected without reset.

Does the MAX32626ITK+T include hardware security features beyond AES encryption?

Yes, the MAX32626ITK+T includes a dedicated Trust Protection Unit (TPU) with a modular arithmetic accelerator (MAA) for ECDSA signing/verification, a true random number generator (TRNG) compliant with NIST SP 800-90B, and a secure boot loader that validates firmware signatures before execution. These features are exclusive to the MAX32626 variant and not present in the MAX32625.

What are the key differences between the MAX32626ITK+T and the MAX32625?

The MAX32626ITK+T adds a Trust Protection Unit (TPU) with modular arithmetic accelerator, hardware PRNG, and secure boot loader-features absent in the MAX32625. Both share identical CPU, memory (512KB flash/160KB SRAM), peripherals, and power architecture. The "ITK+T" suffix denotes the 68-pin TQFN package with exposed pad, common to both variants.

Can the MAX32626ITK+T operate from a single 3.3V supply?

No-the MAX32626ITK+T requires three separate supply domains: VDD12 (1.2V core), VDD18 (1.8V digital), and VDDB (3.3V USB PHY). While VDDIO and VDDIOH support 1.8V–3.3V, the core logic cannot be powered directly from 3.3V. A multi-rail PMIC or discrete LDOs are mandatory to meet absolute maximum ratings and ensure reliable 96MHz operation.

What is the ADC performance specification for the MAX32626ITK+T?

The MAX32626ITK+T features a 10-bit delta-sigma ADC with 7.8ksps sample rate, 58.5dB SNR, ±2 LSB integral nonlinearity, and ±1 LSB differential nonlinearity. It supports four analog inputs (AIN0–AIN3) with selectable reference voltages and input ranges up to 5.5V on AIN0/AIN1-enabling direct interfacing with biomedical sensors without external signal conditioning.