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STMicroelectronics STM32L431RCT6TR
- Part No.:
- STM32L431RCT6TR
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
STM32L431RCT6TR.pdf
- Description:
- IC MCU 32BIT 256KB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,173
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Product details
Overview
STM32L431RCT6TR 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 12-bit ADC (5 Msps), dual 12-bit DACs, op-amp with PGA, and two ultra-low-power comparators. It targets battery-powered IoT edge nodes, portable medical sensors, and smart metering systems requiring sub-µA standby operation and robust mixed-signal integration.
For engineers reviewing the STM32L431RCT6TR datasheet, STM32L431RCT6TR pinout, STM32L431RCT6TR application, or STM32L431RCT6TR equivalent, key selection criteria include its 28 nA Standby mode with RTC, 4 µs wakeup from Stop mode, FlexPowerControl architecture, and support for CAN 2.0B, SAI audio interface, and capacitive touch sensing across 21 channels.
Technical Context
The device 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 supports seven low-power modes-including Shutdown (8 nA), Standby with RTC (280 nA), and Stop 2 (1.0 µA)-with brown-out reset and voltage scaling control.
Clock system includes dual PLLs (system/audio/ADC), four internal oscillators (HSI16, MSI, LSI, HSI48), and external crystal support (4–48 MHz HSE, 32 kHz LSE). Analog subsystem operates on independent supply rails, enabling simultaneous high-precision measurement and ultra-low-power operation.
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 math in resource-constrained edge devices |
| Memory | 256 KB Flash (single-bank, code readout protected), 64 KB SRAM (16 KB with hardware parity) - supports secure firmware storage and error-resilient data buffering |
| Power Consumption | 28 nA Standby mode (5 wakeup pins), 1.0 µA Stop 2 mode - extends battery life to years in intermittently active sensor nodes |
| Analog Peripherals | 1× 12-bit ADC @ 5 Msps (200 µA/Msps), 2× 12-bit DACs, 1× op-amp with PGA, 2× comparators - enables local signal conditioning without external components |
| Timers & Connectivity | 11 timers (including 2 low-power 16-bit timers active in Stop mode), CAN 2.0B, SAI, 4× USART, LPUART, 3× I²C, 3× SPI - supports motor control, audio streaming, and multi-protocol communication |
| Package | LQFP64 (10 × 10 mm, 0.5 mm pitch) - standard surface-mount package compatible with automated assembly and thermal management in compact designs |
Pinout & Package
LQFP64 package: 64-pin quad flat pack with exposed thermal pad, RoHS-compliant, ECOPACK2® certified, suitable for industrial temperature range (–40 °C to +105 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Main power supply and ground | 1.71–3.6 V operation; separate VDDA/VSSA pins enable clean analog supply routing |
| PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD2, PF0–PF1 | General-purpose I/Os | Up to 83 fast I/Os (most 5 V-tolerant); support 16 alternate functions per pin including TIM, USART, SPI, I²C, ADC, DAC |
| NRST | Active-low reset input | Asynchronous reset with internal pull-up; supports external reset button or supervisor IC integration |
| BOOT0 | Boot mode selection | Configures boot source (system memory, embedded Flash, or SRAM) at power-on reset |
| OSC_IN / OSC_OUT | HSE crystal oscillator interface | Supports 4–48 MHz external crystal; essential for precise timing in communication and RTC applications |
| PC13–PC15 | RTC-related signals | PC13 = RTC_OUT, PC14/PC15 = LSE crystal pins - enables hardware calendar, alarms, and calibration with 32.768 kHz reference |
Key Features
| Feature | Design Value |
|---|---|
| FlexPowerControl architecture | Enables dynamic voltage scaling and multi-level low-power modes (Shutdown/Standby/Stop/Run), reducing energy per task by >90% vs. legacy Cortex-M3 |
| ART Accelerator™ | Eliminates Flash wait states at 80 MHz, delivering 3.42 CoreMark/MHz and 176.7 ULPBench® score - critical for deterministic real-time response |
| Capacitive Touch Sensing (TSC) | 21-channel controller supporting touchkey, linear, and rotary sensors - replaces mechanical buttons with single-chip solution and no external RC network |
| True Random Number Generator (RNG) | FIPS-compliant entropy source for cryptographic key generation and secure boot - required for PSA Level 1 certification in IoT endpoints |
| Batch Acquisition Mode (BAM) | Allows CPU to remain in low-power state while peripherals autonomously acquire and process sensor data - ideal for periodic environmental monitoring |
Applications
| Wearable Health Monitor | Smart Utility Meter |
|---|---|
Use Scenario: Continuous ECG/PPG signal acquisition with motion artifact compensation and Bluetooth LE telemetry. IC Role / Device Role / Timing Role: Central MCU executing sensor fusion algorithms, managing dual ADC sampling (ECG + SpO₂), driving OLED display via SPI, and handling BLE stack timing via LPUART wakeup. Use Value: 280 nA Standby with RTC ensures 5+ year coin-cell operation; integrated op-amp and PGA eliminate external signal-conditioning ICs. | Use Scenario: Tamper-resistant electricity/water meter with pulse counting, LCD display, and PLC/GPRS communication. IC Role / Device Role / Timing Role: Primary controller running metrology firmware, interfacing with shunt-based current sensing (via 12-bit ADC), managing LCD via parallel interface, and coordinating CAN bus for fieldbus communication. Use Value: 8 nA Shutdown mode enables instant wake-on-magnetic-tamper event; hardware CRC and 96-bit UID support firmware integrity verification. |
| Industrial Wireless Sensor Node | Portable Diagnostic Device |
Use Scenario: Battery-powered vibration/temperature node transmitting time-synchronized data over LoRaWAN. IC Role / Device Role / Timing Role: Host processor acquiring accelerometer data via SPI, performing FFT analysis using FPU, timestamping events with RTC, and managing LoRa transceiver via UART/SPI. Use Value: 4 µs wakeup from Stop mode minimizes latency in event-triggered sampling; CAN interface allows optional gateway integration. | Use Scenario: Handheld ultrasound probe with analog front-end control, image preprocessing, and USB-C host interface. IC Role / Device Role / Timing Role: Real-time controller managing 12-bit DAC outputs for beamforming waveform generation, synchronizing ADC capture with DAC updates, and handling USB CDC class via SAI/USB PHY emulation. Use Value: Dual 12-bit DACs with sample-and-hold support precise analog excitation; 64 KB SRAM enables local image buffer for edge inference. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-power MCU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32L432KCU6 | Same core/peripherals but UFBGA32 (48-pin), 256 KB Flash, 64 KB SRAM, no CAN, no SAI, no SDMMC | Suitable for space-constrained designs where CAN/audio are unnecessary; lacks RTC calendar and LSE support in some variants | Select when board area is critical and communication scope is limited to I²C/USART/SPI only |
| STM32L552RET6 | ARM Cortex-M33 with TrustZone, 320 KB Flash, 256 KB SRAM, 110 MHz, enhanced security (AES-256, PKA), same LQFP64 package | Required for PSA Certified Level 3 or FIPS 140-2 applications; higher power in Run mode (114 µA/MHz) but superior isolation | Choose when hardware root-of-trust, secure boot, and encrypted firmware update are mandatory |
Compared with STM32L431RCT6TR, STM32L432KCU6 reduces footprint and cost but sacrifices CAN and audio interfaces, while STM32L552RET6 adds security and performance at higher power and price-making the L431 optimal for cost-sensitive, feature-balanced ultra-low-power designs.
Availability
STM32L431RCT6TR is available at Aetrix Electronics and suitable for wearable health monitors, smart utility meters, industrial wireless sensor nodes, and portable diagnostic devices requiring stable component supply across extended product lifecycles.
Supply support for STM32L431RCT6TR 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 management ICs, MEMS, and automotive semiconductors since 1987.
The STM32L4 series targets ultra-low-power embedded applications demanding high performance-per-milliwatt, combining Cortex-M4 efficiency with ST's proprietary power gating and analog integration for battery-operated edge intelligence.
FAQ
What is the maximum operating frequency and corresponding performance metric?
The STM32L431RCT6TR runs at up to 80 MHz with the Arm Cortex-M4 core delivering 100 DMIPS (Dhrystone 2.1) and 273.55 CoreMark® (3.42 CoreMark/MHz). This performance is sustained with zero wait states thanks to the ART Accelerator™, enabling real-time signal processing in power-constrained environments without external RAM or cache.
Does this MCU support hardware encryption or secure boot features?
No, the STM32L431RCT6TR does not include dedicated cryptographic accelerators (AES, PKA) or TrustZone. It supports basic firmware protection via Readout Protection (RDP) Level 1/2 and write protection, plus a 96-bit unique ID for software binding. For hardware security, ST recommends the STM32L5 or STM32H5 series.
What are the supported low-power modes and their typical current draw?
It supports Shutdown (8 nA), Standby (28 nA without RTC, 280 nA with RTC), Stop 2 (1.0 µA), and Stop 1 (1.28 µA with RTC). All modes retain SRAM content and allow wakeup via GPIO, RTC alarm, or LPUART. These values are measured at 3.0 V and 25 °C with ART enabled and peripherals disabled.
Can the internal op-amp be used in standalone mode without external components?
Yes-the integrated operational amplifier supports non-inverting, inverting, and follower configurations using internal resistors and the built-in programmable gain amplifier (PGA). It requires only external feedback if precision gain >8× is needed; for gains of 1–8×, full functionality is achieved with no external passives.
STM32L431RCT6TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 64-LQFP
- Series:
- STM32L4
- Packaging:
- Tape & Reel (TR)
- 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:
- 52
- 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:
STM32L431RCT6TR FAQ
1.How can I place an order for STM32L431RCT6TR through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L431RCT6TR 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 STM32L431RCT6TR reliable?
The price and inventory of STM32L431RCT6TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L431RCT6TR is usually 5 days.
3.What payment methods are accepted for STM32L431RCT6TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L431RCT6TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L431RCT6TR?
STM32L431RCT6TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L431RCT6TR 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 STM32L431RCT6TR?
For technical support, including STM32L431RCT6TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L431RCT6TR requirements.
6.How does Aetrix verify that STM32L431RCT6TR is sourced from the original manufacturer or authorized distributors?
All STM32L431RCT6TR 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 STM32L431RCT6TR meets industry standards.
7.What is the process for return or replacement of STM32L431RCT6TR?
All STM32L431RCT6TR units undergo pre-shipment inspection (PSI). If there is an issue with STM32L431RCT6TR, 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 STM32L431RCT6TR part is unused and in its original packaging.
Return procedure for STM32L431RCT6TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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