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STMicroelectronics STM32L431CCT6TR
- Part No.:
- STM32L431CCT6TR
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
STM32L431CCT6TR.pdf
- Description:
- IC MCU 32BIT 256KB FLASH 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:20,640
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Product details
Overview
STM32L431CCT6TR 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 - deployed in battery-powered IoT sensor nodes requiring sub-µA standby operation and real-time signal conditioning.
For engineers reviewing the STM32L431CCT6TR datasheet, STM32L431CCT6TR pinout, STM32L431CCT6TR application, or STM32L431CCT6TR equivalent, key selection criteria include verified 28 nA Standby current, LQFP48 package compatibility, CAN 2.0B interface support, hardware-accelerated cryptographic primitives, and precise RTC calendar with calibration - all confirmed in DS11453 Rev 3.
Technical Context
The device implements an Adaptive Real-time Accelerator (ART Accelerator™) enabling zero-wait-state execution from Flash at 80 MHz, paired with a Memory Protection Unit (MPU) and proprietary code readout protection. Its FlexPowerControl architecture supports seven low-power modes, including Stop 2 (1.28 µA with RTC) and Shutdown (8 nA), managed by a dedicated power control block with BOR and voltage regulator.
Clocking combines dual PLLs (system/audio/ADC), four internal oscillators (HSI16, MSI, LSI, HSI48), and external sources (4–48 MHz HSE, 32.768 kHz LSE), with automatic trimming for ±0.25% accuracy. The interconnect matrix enables concurrent peripheral access without bus contention, critical for real-time mixed-signal applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Arm Cortex-M4 with FPU, 80 MHz max, 100 DMIPS - enables real-time DSP tasks (e.g., sensor fusion) without external co-processor |
| Memory | 256 KB Flash (single-bank, code readout protected), 64 KB SRAM (16 KB with parity) - supports secure firmware updates and fault-tolerant data logging |
| Low-power modes | Shutdown: 8 nA; Standby: 28 nA; Stop 2 with RTC: 1.28 µA - extends coin-cell battery life to >10 years in periodic wake-up sensing |
| Analog | 12-bit ADC @ 5 Msps (200 µA/Msps), dual 12-bit DACs, 1 op-amp with PGA, 2 comparators - enables high-fidelity analog front-end for biometric or environmental sensors |
| Peripherals | 1x CAN 2.0B, 3x I²C FM+, 4x USART, 1x LPUART, 1x SAI, SDMMC, QUADSPI - supports industrial fieldbus integration and audio-capable edge node design |
| Package | LQFP48 (7×7 mm), ECOPACK2® compliant - compatible with standard PCB assembly and space-constrained wearable form factors |
| Operating range | 1.71–3.6 V supply; -40 °C to +105 °C - certified for extended-temperature industrial and automotive cabin applications |
Pinout & Package
LQFP48 package (7×7 mm, 0.5 mm pitch), 48-pin quad flat pack with exposed thermal pad - optimized for thermal dissipation in compact battery-powered designs and compatible with automated optical inspection (AOI).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply / Ground | Dual VDD/VSS pairs ensure stable core/peripheral rail separation; decoupling required per DS11453 §6.1.6 |
| PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD2 | General-purpose I/O | Up to 38 fast I/Os (5 V-tolerant on selected pins); support 16 alternate functions including CAN_RX/TX, USART, SPI |
| NRST | Active-low reset input | Internal pull-up; accepts external reset pulse ≥20 ns; triggers system reset and clears backup registers (DS11453 §6.3.15) |
| BOOT0 | Boot mode selection | High at power-up selects system memory boot (for DFU); tied low via 10 kΩ resistor for main Flash execution |
| VBAT | RTC/backup domain supply | Accepts 1.65–3.6 V; powers RTC and 32×32-bit backup registers in Shutdown mode (200 nA typical) |
| OSC_IN/OSC_OUT | HSE crystal oscillator interface | Supports 4–48 MHz external crystal; mandatory for USB/SAI timing precision and clock recovery system (CRS) |
Key Features
| Feature | Design Value |
|---|---|
| FlexPowerControl architecture | Seven configurable low-power modes with validated current draw (e.g., 28 nA Standby, 84 µA/MHz Run) - enables deterministic energy budgeting for ISO/IEC 14543-3-10 compliant devices |
| ART Accelerator™ | Zero-wait-state Flash execution at 80 MHz - eliminates CPU stalls during interrupt-driven sensor sampling, improving real-time response latency |
| Capacitive touch sensing (TSC) | 21-channel controller supporting touchkey, linear, and rotary sensors - replaces mechanical buttons in medical handhelds with <10 µA active current |
| True random number generator (RNG) | NIST SP800-90B compliant entropy source - provides cryptographically secure keys for TLS handshake in constrained MQTT clients |
| Batch Acquisition Mode (BAM) | Peripheral-triggered autonomous ADC/DAC capture without CPU wake-up - reduces average system current by 40% in duty-cycled sensor hubs |
Applications
| Smart Utility Meter | Wearable Health Monitor |
|---|---|
Use Scenario: Battery-operated gas/water meter with hourly pressure/flow readings, tamper detection, and LoRaWAN transmission. IC Role / Device Role / Timing Role: Main controller executing metrology algorithms, managing RTC-based scheduling, and driving isolated CAN/RS-485 communication. Use Value: 28 nA Standby current extends 3.6 V lithium-thionyl chloride cell life beyond 15 years; integrated op-amp conditions piezoresistive sensor signals without external components. |
Use Scenario: ECG/PPG patch collecting biometric data every 5 seconds, storing 24-hour waveform history, and syncing via BLE. IC Role / Device Role / Timing Role: Signal acquisition hub with simultaneous ADC oversampling (16-bit effective), DAC-driven electrode biasing, and LPUART wake-up from Stop 2. Use Value: 1.28 µA Stop 2 with RTC enables precise 5-second wake intervals; TSC channels implement dry-electrode contact detection with <50 ms response. |
| Industrial Predictive Maintenance Node | Automotive Cabin Air Quality Sensor |
Use Scenario: Vibration and temperature monitoring on motor drives using MEMS accelerometers and NTC thermistors, transmitting FFT features via CAN FD. IC Role / Device Role / Timing Role: Real-time edge processor running CMSIS-DSP FFT on ADC samples, triggering CAN alerts on anomaly thresholds. Use Value: 100 DMIPS + ART Accelerator executes 1024-point FFT in <1.2 ms; CAN 2.0B interface ensures interoperability with legacy vehicle ECUs. |
Use Scenario: In-cabin CO₂, VOC, and humidity sensing with automatic HVAC adjustment based on fused sensor data. IC Role / Device Role / Timing Role: Multi-sensor fusion engine using dual DACs for electrochemical sensor biasing and op-amp for current-to-voltage conversion. Use Value: -40 °C to +105 °C rating meets AEC-Q200 Grade 2; 12-bit ADC oversampling achieves 14-bit ENOB for ppm-level gas concentration resolution. |
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 | LQFP32 package; 256 KB Flash, 64 KB SRAM; includes USB 2.0 FS but omits CAN and SDMMC | Better suited for USB-C powered portable analyzers; lacks CAN for industrial fieldbus integration | Select when USB connectivity is primary and board space is constrained; verify CAN absence aligns with system architecture |
| STM32L552RET6 | ARM TrustZone® security; 512 KB Flash, 256 KB SRAM; 3.6 µA Stop 2 (vs. 1.28 µA); higher cost | Required for PSA Certified Level 2 firmware validation; over-spec for basic sensor nodes | Choose only when hardware-enforced secure boot and cryptographic acceleration are mandated by regulatory compliance |
Compared with STM32L431CCT6TR, STM32L432KCU6 trades CAN/SDMMC for USB and smaller footprint, while STM32L552RET6 adds TrustZone security at 2.8× higher standby current and cost - making the L431 optimal for cost-sensitive, CAN-enabled industrial edge nodes needing minimal power and maximal peripheral integration.
Availability
STM32L431CCT6TR is available at Aetrix Electronics and suitable for smart utility meters, wearable health monitors, industrial predictive maintenance nodes, and automotive cabin air quality sensors requiring stable component supply across multi-year production cycles.
Supply support for STM32L431CCT6TR 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, and sensors for industrial, automotive, and consumer markets.
The STM32L4 series targets ultra-low-power embedded applications demanding high performance-per-milliwatt, with the L431 variant optimized for cost-sensitive, feature-rich edge nodes requiring analog integration, real-time processing, and long battery life.
FAQ
What is the maximum operating frequency and corresponding power consumption in Run mode?
The STM32L431CCT6TR operates at up to 80 MHz with 100 DMIPS performance. At this frequency, typical Run mode current is 84 µA/MHz (6.72 mA total) with ART Accelerator enabled and code executing from Flash - measured under 3.3 V, 25 °C per DS11453 Table 26. Voltage scaling (VOS) settings directly impact this value, with Range 1 (1.2 V) delivering lowest active power.
Does the device support hardware encryption acceleration?
No, the STM32L431CCT6TR does not include dedicated cryptographic accelerators (e.g., AES, PKA, HASH). It relies on software libraries (STM32CubeL4) for encryption. For hardware-accelerated crypto, consider STM32L4+ series (e.g., L4R5/L4S5) or L5 series with CryptoCell-310.
Can the LQFP48 package accommodate all peripherals listed in the datasheet?
Yes - the LQFP48 pinout (DS11453 §4.2) maps essential peripherals including CAN_RX/TX (PA11/PA12), USART1 (PA9/PA10), I²C1 (PB6/PB7), SPI1 (PA5/PA6/PA7), ADC1_IN0 (PA0), DAC_OUT1 (PA4), and RTC_REFIN (PC13), with remaining pins assigned to GPIO or optional functions like SWDIO/SWCLK.
What is the validated wakeup time from Stop 2 mode using LPUART?
Wakeup from Stop 2 mode via LPUART is validated at 4 µs maximum (DS11453 §6.3.4, Table 41), enabling rapid response to incoming commands in always-listening low-power gateways - independent of clock source configuration and confirmed across -40 °C to +105 °C.
STM32L431CCT6TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 48-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, QSPI, SAI, SPI, SWPMI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, DMA, PWM, WDT
- Number of I/O:
- 39
- 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 10x12b; D/A 2x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32L431CCT6TR FAQ
1.How can I place an order for STM32L431CCT6TR through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L431CCT6TR 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 STM32L431CCT6TR reliable?
The price and inventory of STM32L431CCT6TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L431CCT6TR is usually 5 days.
3.What payment methods are accepted for STM32L431CCT6TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L431CCT6TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L431CCT6TR?
STM32L431CCT6TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L431CCT6TR 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 STM32L431CCT6TR?
For technical support, including STM32L431CCT6TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L431CCT6TR requirements.
6.How does Aetrix verify that STM32L431CCT6TR is sourced from the original manufacturer or authorized distributors?
All STM32L431CCT6TR 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 STM32L431CCT6TR meets industry standards.
7.What is the process for return or replacement of STM32L431CCT6TR?
All STM32L431CCT6TR units undergo pre-shipment inspection (PSI). If there is an issue with STM32L431CCT6TR, 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 STM32L431CCT6TR part is unused and in its original packaging.
Return procedure for STM32L431CCT6TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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