Analog Devices Inc./Maxim Integrated MAX32626IWY+

Overview

MAX32626IWY+ from Maxim Integrated is an ultra-low-power Arm® Cortex®-M4 with FPU microcontroller designed for wearable and IoT edge devices requiring secure, always-on sensing and processing. It integrates 512KB flash, 160KB SRAM, 8KB instruction cache, a 10-bit delta-sigma ADC (7.8ksps), hardware AES-128/192/256, and a Trust Protection Unit (TPU) with modular arithmetic accelerator for ECDSA. It operates from 1.2V core and 1.8–3.3V I/O supplies across –30°C to +85°C.

For engineers reviewing the MAX32626IWY+ datasheet, MAX32626IWY+ pinout, MAX32626IWY+ application, or MAX32626IWY+ equivalent, this page delivers verified specifications, package mapping, power mode behavior, secure boot loader support, and real-world use context for fitness monitors, medical patches, and sensor hubs where battery life, security, and signal integrity are critical.

Technical Context

The MAX32626IWY+ implements a dual-oscillator clock architecture: a factory-trimmed 96MHz internal relaxation oscillator for high-performance execution and a 4MHz RC oscillator optimized for ultra-low-power always-on monitoring. Its Peripheral Management Unit (PMU) enables dynamic clock and power gating across LP0–LP3 modes, with LP1 delivering 2.56μW data retention sleep and 5μs wake-up latency on 96MHz clock source.

Security is hardware-rooted: the TPU includes a true random number generator (TRNG), modular arithmetic accelerator (MAA), and secure boot loader-enabling authenticated firmware updates and ECDSA-based key exchange without software overhead. The 10-bit ADC supports selectable references and buffered/unbuffered input paths, with dedicated AIN0–AIN3 pins capable of up to 5.5V input on AIN0/AIN1 when bypassing the buffer.

Key Specifications

Pinout & Package

The MAX32626IWY+ is packaged 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 SPI, I²C, UART, PWM, and ADC inputs. Ball assignments follow the W6333B+1 land pattern per Maxim Application Note 1891.

Key Features

Applications

Equivalent & Alternatives

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

Compared with Nordic nRF52840 and STMicro STM32L552RE, the MAX32626IWY+ uniquely combines integrated USB 2.0 PHY, 10-bit delta-sigma ADC with 58.5dB SNR, and TPU-based ECDSA acceleration-making it optimal for compact, battery-powered medical and fitness devices requiring analog fidelity, wired firmware updates, and hardware-enforced cryptographic trust.

Availability

MAX32626IWY+ is available at Aetrix Electronics and suitable for sports watches, wearable medical patches, and portable diagnostic devices requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for MAX32626IWY+ 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 IoT applications.

The MAX32626IWY+ belongs to the DARWIN family of ultra-low-power MCUs engineered specifically for wearable and edge-connected medical devices-prioritizing battery longevity, hardware-rooted security, and integrated analog signal chain capability.

FAQ

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

The MAX32626IWY+ supports a maximum system clock frequency of 96MHz via its factory-trimmed internal relaxation oscillator, which is USB-compliant and fully tested. This frequency is achievable across the full operating temperature range (–30°C to +85°C) and enables high-efficiency signal processing for real-time sensor fusion without requiring an external crystal.

Does the MAX32626IWY+ include an integrated USB transceiver?

Yes, the MAX32626IWY+ integrates a full-speed USB 2.0 device transceiver with internal DP/DM drivers and termination resistors. It operates from a 3.3V ±5% supply (VDDB) and supports standard USB HID and CDC class enumeration without external PHY components-reducing bill-of-materials and PCB area in compact wearable designs.

How does the Trust Protection Unit (TPU) in the MAX32626IWY+ enhance security?

The TPU in the MAX32626IWY+ provides hardware-accelerated ECDSA signing via its modular arithmetic accelerator (MAA), a true random number generator (TRNG) for entropy, and a secure boot loader that validates firmware signatures before execution. This ensures cryptographic operations complete in microseconds-not milliseconds-and prevents unauthorized firmware loading or runtime tampering.

What are the key differences between the MAX32626IWY+ and the MAX32625 variant?

The MAX32626IWY+ includes the full Trust Protection Unit (TPU) with MAA, TRNG, and secure boot loader-features absent in the MAX32625. Both share identical 512KB flash, 160KB SRAM, and peripheral sets, but only the MAX32626IWY+ supports hardware-accelerated ECDSA and cryptographically enforced firmware integrity verification required for regulated medical applications.

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

No-the MAX32626IWY+ requires separate 1.2V (VDD12) and 1.8–3.3V (VDD18/VDDIO) supplies. The 1.2V rail powers the core CPU and memory, while I/O banks are independently configurable for 1.8V or 3.3V operation. Using a single 3.3V supply would violate absolute maximum ratings and cause functional failure or permanent damage.