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Analog Devices Inc./Maxim Integrated MAX32631IWQ+T
- Part No.:
- MAX32631IWQ+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Microcontrollers
- Package:
- 100-WFBGA, WLBGA
- Datasheet:
-
MAX32631IWQ+T.pdf
- Description:
- IC MCU 32BIT 2MB FLASH 100WLP
- Quantity:
- Payment:
- Shipping:
Inventory:2,565
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Product details
Overview
MAX32631IWQ+T from Maxim Integrated is a secure ultra-low-power Arm Cortex-M4 with FPU microcontroller designed for wearable and IoT edge nodes. It integrates 2MB flash, 512KB SRAM, 8KB instruction cache, a Trust Protection Unit (TPU) with AES-128/192/256 and modular arithmetic accelerator, and operates at up to 96MHz with 106μA/MHz active current. It enables always-on sensor monitoring in sports watches and medical patches.
For engineers reviewing the MAX32631IWQ+T datasheet, MAX32631IWQ+T pinout, MAX32631IWQ+T application, or MAX32631IWQ+T equivalent, this page delivers verified specifications, validated security features, confirmed low-power operating modes (LP0–LP3), and precise package-level pin mapping for TQFP-EP and WLP variants - critical for battery-constrained, tamper-resistant embedded designs.
Technical Context
The MAX32631IWQ+T implements a dual-voltage architecture: 1.2V core (VDD12) and 1.8V I/O (VDD18/VDDIO), enabling independent power gating per subsystem. Its intelligent Peripheral Management Unit (PMU) supports dynamic clock gating and firmware-controlled power domains, allowing selective wake-up of peripherals like the 10-bit ΔΣ ADC or USB 2.0 engine without CPU intervention.
Security is hardware-rooted via the Trust Protection Unit (TPU), which includes a true random number generator (TRNG), AES engine, and modular arithmetic accelerator (MAA) optimized for ECDSA signature generation. Unlike the base MAX32630, the MAX32631IWQ+T provides full TPU functionality but excludes the secure bootloader found only in the MAX32632.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M4 with FPU, 96MHz max frequency - enables real-time signal processing for biosensor fusion in wearables. |
| Memory | 2MB flash + 512KB SRAM + 8KB instruction cache - supports complex BLE stack, sensor algorithms, and over-the-air updates without external memory. |
| Low-Power Modes | LP0: 600nA (RTC enabled); LP1: 3.5μW/MHz with 5μs wakeup - sustains multi-week battery life in medical patches with periodic sensing. |
| ADC | 10-bit delta-sigma, 7.8ksps, 4-channel input - digitizes analog biosignals (ECG, PPG) with ±2LSB INL and 58.5dB SNR for clinical-grade accuracy. |
| Security Engine | Hardware AES-128/192/256 + TRNG + MAA - accelerates cryptographic operations for secure firmware authentication and encrypted data-at-rest. |
| USB Interface | Full-speed USB 2.0 with internal transceiver and ±5% 3.3V VDDB supply - enables direct PC connectivity for configuration and debug without external PHY. |
| I/O Voltage Range | VDDIO: 1.8V–3.3V; VDDIOH ≥ VDDIO - supports mixed-voltage interfacing with legacy sensors and digital peripherals. |
Pinout & Package
MAX32631IWQ+T is available in two RoHS-compliant packages: 100-pin TQFP-EP (C100E+3) and 100-ball WLP (W1004D4+1). Both support identical pin functions and electrical characteristics; the TQFP variant includes an exposed thermal pad (EP) connected to VSS for enhanced heat dissipation in continuous operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD12 | CPU Core Supply | 1.2V regulated input; bypassed with 1.0μF capacitor - powers Arm core and SRAM; critical for achieving 106μA/MHz active current. |
| VDD18 / VDDIO / VDDIOH | I/O Domain Supplies | Independent 1.8V digital I/O (VDD18), 1.8–3.3V general I/O (VDDIO), and high-voltage I/O (VDDIOH ≥ VDDIO) - enables flexible interface voltage scaling and level-shifting. |
| DP / DM | USB Differential Pair | Bidirectional full-speed USB 2.0 signals with internal 1.5kΩ DP pull-up - eliminates need for external USB termination resistors. |
| TCK/SWCLK, TMS/SWDIO, TDO, TDI | JTAG/SWD Debug Interface | Serial Wire Debug compatible; all pins feature 25kΩ internal pull-ups to VDDIO - simplifies board layout and reduces BOM count. |
| RSTN / SRSTN | Reset Inputs | Hardware reset (RSTN, pulled to VRTC) and software reset (SRSTN, pulled to VDDIO) - supports both cold boot and safe firmware recovery without RTC loss. |
| AIN0–AIN3 | ADC Analog Inputs | Four dedicated analog inputs supporting ±5.5V on AIN0/AIN1 (buffer-bypassed) - accommodates high-voltage sensor outputs without external amplifiers. |
Key Features
| Feature | Design Value |
|---|---|
| SPIX Execute-in-Place Engine | Enables direct code execution from external SPI flash with minimal footprint overhead - extends effective memory capacity without adding parallel bus traces. |
| 16 Pulse Train Engines (PTE) | Hardware-accelerated PWM generation with independent timing control - drives multi-channel LED arrays or motor drivers in fitness trackers with zero CPU load. |
| Flexible Clock System | Internal 96MHz oscillator (USB-compliant ±0.24%) + 4MHz low-power oscillator + 32.768kHz RTC crystal interface - allows seamless transition between performance and ultra-low-power monitoring modes. |
| Peripheral Management Unit (PMU) | Configurable power domains per peripheral group (e.g., USB, ADC, UART) - enables fine-grained power control and autonomous wake-up based on sensor events. |
| Secure Key Storage | Dedicated secure nonvolatile key storage with unique device ID - protects cryptographic keys from extraction even under physical attack or firmware dump. |
Applications
| Sports Watches | Fitness Monitors |
|---|---|
|
Use Scenario: Continuous heart-rate and motion tracking during multi-day outdoor activities with Bluetooth LE telemetry. IC Role / Device Role / Timing Role: Primary MCU managing sensor fusion (accelerometer + optical PPG), real-time FFT processing, and secure OTA updates. Use Value: 600nA LP0 mode with RTC preserves timekeeping and wake-up scheduling while extending battery life beyond 14 days on a single coin cell. |
Use Scenario: Wearable band capturing step count, sleep staging, and SpO₂ using integrated photodiodes and ambient light rejection. IC Role / Device Role / Timing Role: Sensor hub controller with synchronized sampling across multiple ADC channels and hardware-accelerated digital filtering. Use Value: 10-bit ΔΣ ADC with 58.5dB SNR and programmable gain delivers clinical-grade SpO₂ resolution without external signal conditioning. |
| Wearable Medical Patches | Portable Medical Devices |
|
Use Scenario: Single-use ECG patch transmitting raw waveform data to smartphone via BLE, requiring FDA-grade data integrity and tamper resistance. IC Role / Device Role / Timing Role: Secure data acquisition node with hardware AES encryption, TRNG-based session keys, and tamper-evident boot. Use Value: Trust Protection Unit (TPU) ensures cryptographic operations are isolated from main firmware - meeting IEC 62304 Class C and ISO 13485 requirements. |
Use Scenario: Handheld glucose meter with touch interface, LCD driver, and SD card logging - operating from AA batteries for >6 months. IC Role / Device Role / Timing Role: Main system controller integrating capacitive touch sensing, 16-bit PWM for backlight dimming, and USB mass storage emulation. Use Value: Dual I/O voltage domains (VDDIOH up to 3.3V) directly drive LCD segments and SD card interface without level shifters, reducing component count. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar secure ultra-low-power microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX32632IWQ+T | Includes secure bootloader and additional life-cycle management features not present in MAX32631IWQ+T. | Required for field-upgradable medical devices needing signed firmware validation and anti-rollback protection. | Select MAX32632IWQ+T when secure boot and firmware version enforcement are mandatory; otherwise MAX32631IWQ+T offers identical TPU and crypto acceleration at lower cost. |
| Nordic nRF52840-QIAA | No integrated TPU or hardware MAA; relies on software AES and lacks TRNG - higher CPU overhead for crypto operations. | Better suited for BLE-centric applications where RF integration outweighs cryptographic throughput needs. | Choose nRF52840-QIAA only if BLE SoC integration is prioritized over hardware security and ultra-low-power analog sensing capability. |
Compared with MAX32632IWQ+T, the MAX32631IWQ+T omits the secure bootloader but retains full TPU functionality - making it optimal for fixed-function medical patches where firmware is pre-provisioned. Versus nRF52840-QIAA, it delivers superior analog front-end precision, deterministic low-power modes, and hardware-accelerated cryptography essential for regulated health devices.
Availability
MAX32631IWQ+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 MAX32631IWQ+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 IoT applications.
The MAX32631IWQ+T belongs to the DARWIN family of ultra-low-power MCUs engineered specifically for battery-operated, security-critical wearable and medical edge devices - emphasizing wearable-grade power efficiency, hardware-rooted trust, and integrated analog signal chain capability.
FAQ
What is the maximum operating frequency of the MAX32631IWQ+T CPU core?
The MAX32631IWQ+T features an Arm Cortex-M4 with FPU core rated for up to 96MHz operation. This frequency is supported by the internal relaxation oscillator, factory-trimmed to ±0.24% for USB compliance. The core can also run at 4MHz for ultra-low-power monitoring tasks, reducing active current to 72μA while maintaining full functionality.
Does the MAX32631IWQ+T include a hardware AES engine?
Yes, the MAX32631IWQ+T includes a dedicated hardware AES engine supporting AES-128, AES-192, and AES-256 encryption and decryption. This engine operates independently of the CPU, enabling high-throughput secure communication and data-at-rest protection without compromising real-time sensor processing performance in the MAX32631IWQ+T.
What is the difference between MAX32631IWQ+T and MAX32632IWQ+T?
The MAX32631IWQ+T and MAX32632IWQ+T share identical core architecture, memory, TPU, and peripheral sets. The key distinction is that the MAX32632IWQ+T adds a secure bootloader with cryptographic signature verification and firmware rollback protection - a feature absent in the MAX32631IWQ+T. Both parts include the full Trust Protection Unit.
Which package options are available for the MAX32631IWQ+T?
The MAX32631IWQ+T is offered in two qualified packages: 100-pin TQFP-EP (C100E+3) with exposed thermal pad, and 100-ball WLP (W1004D4+1). Both packages support identical pinouts, electrical behavior, and thermal performance specifications - allowing design reuse across form factors while maintaining manufacturability and testability.
What ADC performance specifications does the MAX32631IWQ+T provide?
The MAX32631IWQ+T integrates a 10-bit delta-sigma ADC with 7.8ksps sample rate, ±2LSB integral nonlinearity, and 58.5dB signal-to-noise ratio. It supports four analog inputs (AIN0–AIN3), with AIN0/AIN1 tolerant to ±5.5V when buffer-bypassed - enabling direct connection to high-voltage biosensors without external signal conditioning circuitry in the MAX32631IWQ+T.
MAX32631IWQ+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 100-WFBGA, WLBGA
- Series:
- DARWIN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M4F
- Core Size:
- 32-Bit Single-Core
- Speed:
- 96MHz
- Connectivity:
- 1-Wire, I2C, SPI, UART/USART, USB
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, TPU, WDT
- Number of I/O:
- 66
- Program Memory Size:
- 2MB (2M x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 512K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.14V ~ 3.6V
- Data Converters:
- A/D 4x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -20°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MAX32631IWQ+T FAQ
1.How can I place an order for MAX32631IWQ+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX32631IWQ+T on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX32631IWQ+T reliable?
The price and inventory of MAX32631IWQ+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX32631IWQ+T is usually 5 days.
3.What payment methods are accepted for MAX32631IWQ+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX32631IWQ+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX32631IWQ+T?
MAX32631IWQ+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX32631IWQ+T order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX32631IWQ+T?
For technical support, including MAX32631IWQ+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX32631IWQ+T requirements.
6.How does Aetrix verify that MAX32631IWQ+T is sourced from the original manufacturer or authorized distributors?
All MAX32631IWQ+T products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX32631IWQ+T meets industry standards.
7.What is the process for return or replacement of MAX32631IWQ+T?
All MAX32631IWQ+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX32631IWQ+T, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX32631IWQ+T part is unused and in its original packaging.
Return procedure for MAX32631IWQ+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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