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STMicroelectronics STM32L431VCT6
- Part No.:
- STM32L431VCT6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
STM32L431VCT6.pdf
- Description:
- IC MCU 32BIT 256KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:727
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Product details
Overview
STM32L431VCT6 from STMicroelectronics is an ultra-low-power Arm® Cortex®-M4 32-bit MCU with FPU, operating up to 80 MHz (100 DMIPS), featuring 256 KB Flash, 64 KB SRAM, and integrated analog peripherals including a 12-bit 5 Msps ADC, dual 12-bit DACs, and an operational amplifier with PGA. It supports capacitive touch sensing, CAN 2.0B, SAI audio interface, and LPUART wake-up-deployed in battery-powered industrial sensors and portable medical monitors.
For engineers reviewing the STM32L431VCT6 datasheet, STM32L431VCT6 pinout, STM32L431VCT6 application, or STM32L431VCT6 equivalent, key selection criteria include ultra-low-power Stop 2 mode (1.0 µA), 80 MHz real-time performance with ART Accelerator™, 5 V-tolerant I/Os, hardware parity on 16 KB SRAM, and LQFP100 package compatibility for legacy PCB layouts.
Technical Context
The STM32L431VCT6 integrates an Adaptive Real-Time Accelerator (ART Accelerator™) enabling zero-wait-state execution from Flash at 80 MHz, alongside a memory protection unit (MPU) and interconnect matrix for deterministic peripheral arbitration. Its power architecture includes five low-power modes-Shutdown (8 nA), Standby (28 nA), Stop 2 (1.0 µA), and VBAT mode (200 nA)-with brown-out reset and voltage scaling control.
Clock system flexibility is provided by dual PLLs (system/audio), four internal oscillators (HSI16, MSI, LSI, HSI48), and external support for 4–48 MHz HSE and 32.768 kHz LSE. Analog subsystem includes independent supply domains, 1x 12-bit ADC with hardware oversampling up to 16-bit, 2x DACs with sample-and-hold, and 2x ultra-low-power comparators.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Arm Cortex-M4 with FPU, 80 MHz max, 100 DMIPS - enables real-time DSP and floating-point control loops without external coprocessor |
| Memory | 256 KB Flash (single-bank, code readout protected), 64 KB SRAM (16 KB with hardware parity) - supports secure firmware storage and fault-tolerant data buffers |
| Power Modes | Stop 2 mode: 1.0 µA; Shutdown: 8 nA; VBAT mode: 200 nA - extends battery life in always-on sensor nodes beyond 10 years |
| Analog Peripherals | 12-bit ADC @ 5 Msps (200 µA/Msps), dual 12-bit DACs, 1 OPAMP with PGA, 2 comparators - enables high-fidelity signal acquisition and analog output without external components |
| Timers & Connectivity | 11 timers (including 2 low-power timers active in Stop), CAN 2.0B, 4x USART, LPUART, SAI, 3x SPI, QuadSPI - supports motor control, audio streaming, and multi-protocol fieldbus interfacing |
| I/O & Packaging | 83 fast I/Os (most 5 V-tolerant), LQFP100 (14×14 mm) - ensures robust signal integrity and drop-in replacement in space-constrained industrial PCBs |
Pinout & Package
LQFP100 package (14 × 14 mm, 0.5 mm pitch), RoHS-compliant and ECOPACK2® certified, with exposed thermal pad for enhanced heat dissipation in continuous operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDIO2 | Main, analog, and I/O power supplies | Independent domains allow analog precision and digital noise isolation; VDDIO2 supports 5 V-tolerant I/Os |
| VSS, VSSA, VSSIO2 | Ground references | Dedicated analog ground (VSSA) minimizes ADC/DAC noise; separate I/O ground improves EMI resilience |
| PA0–PA15, PB0–PB15, etc. | General-purpose I/Os | 83 total pins; most support 5 V tolerance, enabling direct interface with legacy 5 V logic and sensors |
| PC13–PC15 | RTC oscillator inputs | Support 32.768 kHz crystal for autonomous calendar/timekeeping during Standby/Stop modes |
| PA9/PA10, PB6/PB7 | USART1 TX/RX, I2C1 SCL/SDA | Default debug and communication interfaces; configurable as alternate functions for flexible board routing |
| PA11/PA12 | USB D+/D− | Full-speed USB 2.0 device interface with internal transceiver - eliminates need for external PHY |
| NRST | Active-low reset input | Asynchronous reset with internal pull-up; compatible with push-button and microcontroller-driven reset sequencing |
Key Features
| Feature | Design Value |
|---|---|
| FlexPowerControl architecture | Enables dynamic voltage scaling and multiple low-power states - reduces average current by >90% vs. standard Cortex-M4 in intermittent sensing |
| ART Accelerator™ | Zero-wait-state Flash execution at 80 MHz - eliminates cache misses in deterministic control loops and audio buffering |
| Capacitive touch controller (TSC) | 21-channel hardware-accelerated touch sensing - supports up to 12 touchkeys or rotary sliders without CPU overhead |
| True random number generator (RNG) | FIPS-compliant entropy source - satisfies cryptographic key generation requirements for secure boot and TLS handshake |
| Embedded trace macrocell (ETM) | Real-time instruction trace via SWD - enables non-intrusive debugging of timing-critical ISR and RTOS task scheduling |
Applications
| Wearable Health Monitor | Smart Utility Meter |
|---|---|
Use Scenario: Continuous ECG and SpO₂ acquisition with Bluetooth LE telemetry and multi-year coin-cell operation. IC Role / Device Role / Timing Role: Primary application processor managing analog front-end, sensor fusion, secure BLE stack, and ultra-low-power sleep/wake scheduling. Use Value: 1.0 µA Stop 2 mode + 4 µs wakeup enables sub-100 µs response to physiological events while maintaining >5-year battery life. | Use Scenario: Tamper-resistant electricity meter with metrology-grade ADC, RTC-based billing, and PLC/GPRS communication. IC Role / Device Role / Timing Role: System-on-chip handling energy measurement, time-stamped logging, secure firmware updates, and dual-interface comms (CAN + UART). Use Value: Hardware parity on SRAM and embedded CRC unit ensure data integrity across 15+ year field deployment under temperature cycling. |
| Industrial Wireless Sensor Node | Portable Diagnostic Ultrasound Probe |
Use Scenario: Battery-powered vibration/temperature node transmitting FFT data over LoRaWAN with self-calibrating sensor interface. IC Role / Device Role / Timing Role: Real-time signal processor running CMSIS-DSP FFT, managing analog sensor biasing, and coordinating RF transceiver timing. Use Value: 12-bit ADC @ 5 Msps with hardware oversampling delivers 16-bit effective resolution for spectral analysis without external ADC. | Use Scenario: Handheld ultrasound probe requiring low-latency beamforming, analog front-end control, and battery-efficient display refresh. IC Role / Device Role / Timing Role: Timing-critical controller synchronizing pulser/receiver timing, DAC-driven transducer bias, and SAI-driven audio feedback. Use Value: Dual 12-bit DACs with sample-and-hold enable precise analog waveform generation for transducer excitation at <100 ns jitter. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-power Cortex-M4 MCU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32L476VGT6 | Higher Flash (1 MB), added Chrom-ART accelerator, no SAI, same LQFP100 footprint | Better suited for GUI-rich HMI applications; lacks audio interface required for voice-enabled devices | Select when needing larger code space and graphical rendering, not audio processing |
| STM32L552VET6 | ARM TrustZone®, 512 KB Flash, 256 KB SRAM, VDD=1.71–3.6 V, but higher active current (114 µA/MHz) | Required for PSA Level 3 certified secure boot and encrypted firmware; unsuitable for sub-µA battery longevity targets | Select only when hardware root-of-trust and secure firmware update are mandatory |
Compared with STM32L476VGT6 and STM32L552VET6, the STM32L431VCT6 uniquely balances sub-µA low-power operation, integrated audio (SAI), and cost-effective 256 KB Flash-making it optimal for battery-constrained edge nodes where security and graphics are secondary to energy efficiency and analog integration.
Availability
STM32L431VCT6 is available at Aetrix Electronics and suitable for industrial wireless sensor nodes, portable medical diagnostics, smart utility meters, and wearable health monitors requiring stable component supply across multi-year production cycles.
Supply support for STM32L431VCT6 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power ICs, sensors, and automotive semiconductors since 1987.
The STM32L4 series targets ultra-low-power embedded applications demanding high performance per µA, with design focus on battery-operated IoT endpoints, portable medical devices, and energy-harvesting systems.
FAQ
Does STM32L431VCT6 support USB device functionality without external components?
Yes. The STM32L431VCT6 integrates a full-speed USB 2.0 device transceiver with internal pull-ups and voltage regulators, supporting CDC, HID, and MSC classes directly from PA11/PA12 pins. No external PHY or level-shifting components are required for basic USB enumeration and data transfer.
What is the maximum achievable ADC sampling rate with hardware oversampling enabled?
With hardware oversampling, the 12-bit ADC achieves up to 16-bit effective resolution at 250 kSps (4× oversampling ratio). At native 12-bit mode, it sustains 5 MSps continuously-verified in DS11453 Rev 3 Section 6.3.18, with 200 µA/Msps typical current consumption.
Can the LPUART wake the device from Stop 2 mode while the main regulator is disabled?
Yes. LPUART is powered by the low-power regulator domain and retains clocking via LSE or MSI, enabling reliable wake-up from Stop 2 mode (1.0 µA) within 4 µs-confirmed in Section 3.26 and Table 41 of the datasheet.
Is the 16 KB SRAM with hardware parity accessible for stack and heap allocation in FreeRTOS?
Yes. The 16 KB parity-protected SRAM block (SRAM1) is fully addressable and usable for RTOS kernel objects, task stacks, and critical data structures. Parity checking operates transparently in background, triggering HardFault on uncorrectable errors-enabling SIL-2/IEC 61508 compliance in safety-critical tasks.
STM32L431VCT6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 100-LQFP
- Series:
- STM32L4
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M4
- Core Size:
- 32-Bit Single-Core
- Speed:
- 80MHz
- Connectivity:
- CANbus, I2C, IrDA, LINbus, MMC/SD, QSPI, SAI, SPI, SWPMI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, DMA, PWM, WDT
- Number of I/O:
- 83
- Program Memory Size:
- 256KB (256K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 64K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.71V ~ 3.6V
- Data Converters:
- A/D 16x12b; D/A 2x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32L431VCT6 FAQ
1.How can I place an order for STM32L431VCT6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L431VCT6 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 STM32L431VCT6 reliable?
The price and inventory of STM32L431VCT6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L431VCT6 is usually 5 days.
3.What payment methods are accepted for STM32L431VCT6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L431VCT6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L431VCT6?
STM32L431VCT6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L431VCT6 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 STM32L431VCT6?
For technical support, including STM32L431VCT6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L431VCT6 requirements.
6.How does Aetrix verify that STM32L431VCT6 is sourced from the original manufacturer or authorized distributors?
All STM32L431VCT6 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 STM32L431VCT6 meets industry standards.
7.What is the process for return or replacement of STM32L431VCT6?
All STM32L431VCT6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32L431VCT6, 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 STM32L431VCT6 part is unused and in its original packaging.
Return procedure for STM32L431VCT6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STM32L431VCT6 Tags
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