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Analog Devices Inc./Maxim Integrated MAX32631IWG+T
- Part No.:
- MAX32631IWG+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Microcontrollers
- Package:
- 100-WFBGA, WLBGA
- Datasheet:
-
MAX32631IWG+T.pdf
- Description:
- IC MCU 32BIT 2MB FLASH 100WLP
- Quantity:
- Payment:
- Shipping:
Inventory:1,832
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Product details
Overview
MAX32631IWG+T from Maxim Integrated is an ARM Cortex-M4F 32-bit microcontroller with floating-point unit and Trust Protection Unit (TPU), designed for ultra-low-power wearable medical and fitness applications. It operates at up to 96MHz, integrates 2MB Flash/512KB SRAM, features a 10-bit delta-sigma ADC (7.8ksps), full-speed USB 2.0 with internal transceiver, and achieves 600nA LP0 mode current with RTC enabled.
For engineers reviewing the MAX32631IWG+T datasheet, MAX32631IWG+T pinout, MAX32631IWG+T application, or MAX32631IWG+T equivalent, key selection criteria include secure boot capability, sub-μA low-power modes, integrated AES-128/192/256 engine, and 100-ball WLP package compatibility with space-constrained wearable designs.
Technical Context
The MAX32631IWG+T implements a dual-oscillator system-96MHz internal relaxation oscillator (USB-compliant ±0.25%) and 4MHz RC oscillator-for flexible power/performance trade-offs across active and always-on monitoring modes. Its Peripheral Management Unit (PMU) supports up to six independent channel gating, enabling fine-grained peripheral power control without CPU intervention.
Security architecture centers on the Trust Protection Unit (TPU), which includes a Modular Arithmetic Accelerator (MAA) for ECDSA acceleration, hardware PRNG entropy source, and secure boot loader enforcing authenticated firmware execution. The TPU is exclusive to the MAX32631 variant and not present in MAX32630.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | ARM Cortex-M4F with FPU, 96MHz max clock - enables real-time sensor fusion and floating-point math in battery-powered wearables. |
| Memory | 2MB Flash / 512KB SRAM / 8KB instruction cache - supports complex firmware, OTA updates, and local data buffering without external memory. |
| Power Modes | LP0 (600nA w/RTC), LP1 (3.5μW w/5μs wakeup), LP2/LP3 - extends battery life in multi-week wearable deployments with rapid wake-from-sleep response. |
| ADC | 10-bit delta-sigma, 7.8ksps, 4-channel, 5V-tolerant AIN0/AIN1 - directly interfaces biomedical sensors (ECG, PPG) without level-shifting. |
| Security | TPU with MAA, AES-128/192/256, secure boot, unique ID, PRNG - meets HIPAA-relevant data-at-rest and firmware integrity requirements. |
| USB | Full-speed USB 2.0 with integrated transceiver, 3.3V ±5% VDDB supply - eliminates external PHY, reduces BOM count and PCB area in compact form factors. |
| I/O Voltage | VDDIO/VDDIOH: 1.8V–3.6V (separate rails) - allows mixed-voltage interfacing with legacy 3.3V sensors and modern 1.8V peripherals. |
Pinout & Package
MAX32631IWG+T uses a 100-ball Wafer-Level Package (WLP) with 4.37mm × 4.37mm footprint and 0.4mm ball pitch. Package code W1004D4+1 conforms to JEDEC MO-220, land pattern per Application Note 1891.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD12 | 1.2V Core Supply | Must be decoupled with 1.0μF capacitor; powers ARM core, SRAM, and digital logic - critical for LP0/LP1 current spec compliance. |
| VDD18 / VDDIO / VDDIOH | I/O Supply Rails | VDD18 (1.8V) for digital I/O; VDDIO (1.8–3.6V) for GPIO; VDDIOH (≥VDDIO) for high-drive GPIO - enables flexible voltage domain partitioning. |
| DP / DM | USB Differential Pair | Integrated full-speed transceiver; DP has internal ~1.2kΩ pull-up; no external resistors required - simplifies USB layout and ESD protection. |
| RSTN / SRSTN | Hardware / Software Reset | RSTN (active-low, pulled to VRTC) triggers full POR; SRSTN (active-low, pulled to VDDIO) resets ARM core/peripherals only - supports debug-friendly soft reset. |
| AIN0–AIN3 | Analog Inputs | AIN0/AIN1 tolerate 5V input; AIN2/AIN3 limited to 3.6V - allows direct connection of diverse analog front-ends without external clamping. |
| TCK/SWCLK, TMS/SWDIO | JTAG/SWD Debug | 25kΩ internal pull-ups to VDDIO - enables single-wire debug (SWD) with minimal external components for production programming and field diagnostics. |
Key Features
| Feature | Design Value |
|---|---|
| SPIX Execute-in-Place Engine | Enables direct code execution from external SPI flash, reducing SRAM pressure and supporting >2MB firmware images without external RAM. |
| Peripheral Management Unit (PMU) | 6-channel autonomous peripheral gating - cuts dynamic power by disabling unused peripherals (e.g., UART, I²C) during sleep without CPU involvement. |
| Dynamic Clock Gating | Firmware-controlled clock enable/disable per peripheral block - eliminates switching power in idle modules (e.g., timers, PWM) while retaining state. |
| 16 Pulse Train Engines | Independent, configurable PWM generators - drives multi-channel LED arrays, haptic feedback, or motor control in fitness trackers without CPU load. |
| Secure Boot Loader | Verifies cryptographic signature of firmware image before execution - prevents unauthorized or corrupted code from running, satisfying medical device security mandates. |
Applications
| Sports Watches | Fitness Monitors |
|---|---|
Use Scenario: Multi-sport tracking with GPS offload, heart rate monitoring, and Bluetooth LE connectivity. IC Role / Device Role / Timing Role: Primary application processor managing sensor fusion (accelerometer, gyroscope, optical HR), real-time activity classification, and USB charging/firmware update interface. Use Value: LP1 mode (3.5μW) maintains RTC and sensor wake logic during sleep; 5μs wakeup ensures immediate response to motion interrupts. |
Use Scenario: Continuous wrist-based PPG and accelerometer logging for calorie estimation and sleep staging. IC Role / Device Role / Timing Role: Low-power sensor hub aggregating analog inputs, performing on-device filtering, and compressing data for BLE transmission. Use Value: 10-bit ADC with selectable references captures weak PPG signals; 4MHz oscillator option minimizes active current during background sampling. |
| Wearable Medical Patches | Portable Medical Devices |
Use Scenario: Single-use ECG patch transmitting diagnostic-quality waveforms via BLE to smartphone. IC Role / Device Role / Timing Role: Secure data acquisition controller with AES-128 encryption of raw ECG samples prior to wireless transmission. Use Value: TPU's MAA accelerates ECDSA signing for firmware authenticity; secure NV key storage protects patient data confidentiality. |
Use Scenario: Handheld spirometer with analog flow sensor, display, and USB-C host interface for clinical data export. IC Role / Device Role / Timing Role: System-on-chip replacing discrete MCU + USB PHY + crypto IC - integrates all functions into one 4.37mm² WLP. Use Value: Integrated USB transceiver eliminates external PHY; 2MB Flash stores calibration tables and regulatory test logs locally. |
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 |
|---|---|---|---|
| Nordic nRF5340 DK | ARM Cortex-M33 dual-core (app/network), no integrated USB PHY, requires external crystal for USB, 1MB Flash/256KB RAM | Lacks integrated full-speed USB transceiver and TPU-grade security; targets BLE-centric designs over USB-connected medical devices | Select when BLE mesh or Thread coexistence is primary; avoid when USB-C charging/data export is mandatory. |
| TI MSP432E401Y | Cortex-M4F @ 120MHz, 1MB Flash/256KB RAM, no hardware TPU or MAA, USB OTG (requires external PHY), higher LP0 current (~1.2μA) | Offers higher compute throughput but lacks certified secure boot and sub-μA RTC retention - insufficient for FDA Class II wearable data integrity requirements | Choose for industrial sensor gateways needing Ethernet; not recommended for HIPAA-aligned wearable medical use cases. |
Compared with Nordic nRF5340 DK and TI MSP432E401Y, MAX32631IWG+T uniquely delivers integrated USB 2.0 transceiver, TPU with MAA-accelerated ECDSA, and 600nA LP0 mode - making it the only option meeting simultaneous constraints of medical-grade security, USB connectivity, and multi-week battery life in sub-5mm² footprint.
Availability
MAX32631IWG+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 RoHS-compliant packaging.
Supply support for MAX32631IWG+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) is a leader in highly integrated analog, mixed-signal, and power management solutions for space-constrained, battery-powered systems.
The MAX32630/MAX32631 product line was engineered specifically for ultra-low-power wearable medical and fitness applications, emphasizing secure data handling, minimal active/sleep current, and sensor-rich peripheral integration in wafer-level packages.
FAQ
What distinguishes MAX32631IWG+T from MAX32630IWG+T?
The MAX32631IWG+T includes a Trust Protection Unit (TPU) with Modular Arithmetic Accelerator (MAA), hardware PRNG, secure boot loader, and unique ID - features absent in MAX32630IWG+T. Both share identical core, memory, peripherals, and power specs, but only MAX32631IWG+T satisfies cryptographic requirements for HIPAA-compliant wearable medical devices.
Does MAX32631IWG+T require an external crystal for USB operation?
Yes. MAX32631IWG+T requires a 32.768kHz crystal connected between 32KIN and 32KOUT pins for USB timing compliance. The internal 96MHz oscillator is factory-trimmed to ±0.25% for USB full-speed operation, but the 32kHz reference is mandatory for USB SOF generation and frame synchronization.
What is the maximum allowable voltage on AIN0 and AIN1 pins of MAX32631IWG+T?
AIN0 and AIN1 pins on MAX32631IWG+T are 5V-tolerant, with absolute maximum rating of –0.3V to +5.5V. This allows direct connection to legacy analog sensors (e.g., thermistors, strain gauges) without external level-shifting circuitry, simplifying front-end design in multi-vendor wearable platforms.
How does the Peripheral Management Unit (PMU) reduce power in MAX32631IWG+T?
The PMU in MAX32631IWG+T autonomously gates power to up to six peripheral channels (e.g., UART, I²C, SPI) based on firmware-configured triggers - eliminating leakage and dynamic power without CPU polling. This enables true zero-software-overhead peripheral sleep, critical for extending battery life in always-on sensor monitoring.
Can MAX32631IWG+T execute code directly from external SPI flash?
Yes. MAX32631IWG+T includes an SPIX (SPI eXecute-in-Place) engine that maps external SPI flash into the memory address space, allowing direct instruction fetch and execution without copying to internal SRAM. This preserves 512KB SRAM for real-time data buffers and reduces boot time in memory-constrained wearable firmware.
MAX32631IWG+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:
MAX32631IWG+T FAQ
1.How can I place an order for MAX32631IWG+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX32631IWG+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 MAX32631IWG+T reliable?
The price and inventory of MAX32631IWG+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX32631IWG+T is usually 5 days.
3.What payment methods are accepted for MAX32631IWG+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX32631IWG+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX32631IWG+T?
MAX32631IWG+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX32631IWG+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 MAX32631IWG+T?
For technical support, including MAX32631IWG+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX32631IWG+T requirements.
6.How does Aetrix verify that MAX32631IWG+T is sourced from the original manufacturer or authorized distributors?
All MAX32631IWG+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 MAX32631IWG+T meets industry standards.
7.What is the process for return or replacement of MAX32631IWG+T?
All MAX32631IWG+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX32631IWG+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 MAX32631IWG+T part is unused and in its original packaging.
Return procedure for MAX32631IWG+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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