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STMicroelectronics STM32L431CCU6
- Part No.:
- STM32L431CCU6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 48-UFQFN Exposed Pad
- Datasheet:
-
STM32L431CCU6.pdf
- Description:
- IC MCU 32BIT 256KB FLSH 48UFQFPN
- Quantity:
- Payment:
- Shipping:
Inventory:1,935
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Product details
Overview
STM32L431CCU6 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 supports capacitive touch sensing (21 channels), SAI audio interface, CAN 2.0B, and LPUART for battery-powered IoT sensor nodes.
For engineers reviewing the STM32L431CCU6 datasheet, STM32L431CCU6 pinout, STM32L431CCU6 application, or STM32L431CCU6 equivalent, key selection criteria include its 280 nA Standby+RTC current, 4 µs wakeup from Stop mode, ART Accelerator™ enabling zero-wait-state Flash execution, and UFBGA64 (5×5 mm) package with 48 I/Os - critical for space-constrained portable medical devices and wireless sensor transceivers.
Technical Context
The STM32L431CCU6 integrates an Adaptive Real-time Accelerator (ART™) that eliminates Flash wait states at 80 MHz, paired with a Memory Protection Unit (MPU) and proprietary code readout protection. Its power architecture includes five low-power modes (Shutdown, Standby, Stop 0/1/2), with VBAT supply supporting RTC and 32×32-bit backup registers in 200 nA mode.
Clock system flexibility includes dual PLLs (system/audio), auto-trimmed MSI (100 kHz–48 MHz, ±0.25%), HSE (4–48 MHz), LSE (32.768 kHz), and HSI48 for USB/SAI. Analog subsystem features independent supply domains, hardware oversampling (up to 16-bit), and low-power sample-and-hold DACs - enabling simultaneous high-precision sensing and audio playback.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Arm Cortex-M4 with FPU, 80 MHz max, 100 DMIPS - enables real-time DSP filtering and sensor fusion without external coprocessor |
| Memory | 256 KB Flash (single-bank, code readout protection), 64 KB SRAM (16 KB with parity) - supports secure firmware updates and ECC-critical data buffers |
| Power Consumption | 280 nA Standby + RTC, 1.0 µA Stop 2 mode - extends coin-cell battery life to >10 years in always-on monitoring applications |
| Analog Peripherals | 1× 12-bit ADC (5 Msps, 200 µA/Msps), 2× 12-bit DACs, 1× op-amp with PGA, 2× comparators - enables closed-loop analog control with <1 µs response |
| Timers & Connectivity | 11 timers (including 2 low-power 16-bit timers active in Stop), 1× SAI, 3× I²C, 4× USART, 1× LPUART, 1× CAN 2.0B - supports concurrent BLE coexistence, motor control, and time-synced sensor aggregation |
| Package & I/O | UFBGA64 (5×5 mm, 0.5 mm pitch), 48 GPIOs (most 5 V-tolerant) - fits compact wearable PCBs while retaining robust interfacing to legacy peripherals |
| Development Support | SWD/JTAG debug, Embedded Trace Macrocell™ - enables real-time instruction trace and low-overhead power profiling during firmware optimization |
Pinout & Package
STM32L431CCU6 is housed in a 64-ball Ultra-Fine Pitch Ball Grid Array (UFBGA64) package measuring 5 mm × 5 mm with 0.5 mm ball pitch. This package supports automated optical inspection (AOI) and offers thermal performance suitable for sealed industrial enclosures.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Main power supply / ground | Dual 1.71–3.6 V supply rails with internal regulator; decoupling required per datasheet layout guidelines to maintain 80 MHz stability |
| VBAT | Backup power input | Direct connection to coin cell or supercapacitor to retain RTC calendar and 32×32-bit backup registers during main power loss |
| PA0–PA15, PB0–PB15, PC0–PC15, PD2 | General-purpose I/Os | 48 total GPIOs; most support 5 V tolerance, interrupt capability, and multiple alternate functions (e.g., USART, SPI, TIM) |
| NRST | Active-low reset input | Asynchronous reset pin with internal pull-up; accepts external push-button or supervisor IC assertion for deterministic recovery |
| BOOT0 | Boot mode selection | High at power-up forces system memory boot (for DFU); tied low via 10 kΩ resistor for normal Flash execution |
| OSC_IN / OSC_OUT | HSE crystal oscillator terminals | Supports 4–48 MHz external crystals; mandatory for USB/SAI timing accuracy and high-precision RTC calibration |
Key Features
| Feature | Design Value |
|---|---|
| FlexPowerControl architecture | Five configurable low-power modes (Shutdown to Run) with sub-µA Standby+RTC and 4 µs wakeup - enables duty-cycled sensing without sacrificing responsiveness |
| ART Accelerator™ | Zero-wait-state execution from Flash at 80 MHz - eliminates cache misses in deterministic real-time loops (e.g., PID control, audio buffering) |
| Capacitive Touch Sensing (TSC) | 21-channel controller supporting touchkey, linear, and rotary sensors - replaces mechanical buttons with waterproof, wear-free UI in medical handhelds |
| Independent analog supply domain | Dedicated VDDA/VSSA pins with separate filtering - isolates noise-sensitive ADC/DAC operation from digital switching, achieving >70 dB SNR |
| True Random Number Generator (RNG) | NIST SP800-90B compliant entropy source - provides cryptographically secure keys for TLS handshake in constrained-edge OTA updates |
Applications
| Wearable Health Monitor | Smart Utility Meter |
|---|---|
|
Use Scenario: Continuous ECG/PPG signal acquisition with Bluetooth LE telemetry and on-device arrhythmia detection. IC Role / Device Role / Timing Role: Main controller executing sensor fusion algorithms, managing SAI-driven analog front-end, and synchronizing LPUART wakeups for periodic data burst transmission. Use Value: 280 nA Standby+RTC enables multi-year battery life; 12-bit ADC oversampling achieves clinical-grade resolution without external sigma-delta converters. |
Use Scenario: Battery-backed gas/water meter with pulse counting, temperature compensation, and NB-IoT reporting every 15 minutes. IC Role / Device Role / Timing Role: System-on-chip handling metrology calculations, RTC-based scheduling, and CAN bus diagnostics for valve actuation feedback. Use Value: Shutdown mode (8 nA) minimizes self-discharge; built-in op-amp and comparators condition analog sensor outputs without discrete BOM cost. |
| Industrial Wireless Sensor Node | Portable Diagnostic Device |
|
Use Scenario: LoRaWAN-enabled vibration/temperature node deployed in rotating machinery with predictive maintenance firmware. IC Role / Device Role / Timing Role: Real-time FFT processing on accelerometer data using DSP instructions, triggering LPUART wakeup only on anomaly detection. Use Value: 100 DMIPS + FPU enables floating-point spectral analysis; 48 GPIOs route multiple sensor interfaces (I²C, SPI, analog) on single-layer PCB. |
Use Scenario: Handheld ultrasound probe requiring low-noise analog signal chain, battery management, and USB-C host connectivity. IC Role / Device Role / Timing Role: Central controller managing SAI audio streaming, DAC-driven transducer excitation, and USB device enumeration via HSI48 clock recovery. Use Value: Dual DACs with sample-and-hold enable precise waveform generation; UFBGA64 footprint allows tight integration with RF shielding and high-density analog routing. |
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 |
|---|---|---|---|
| STM32L432KCU6 | Same core/peripherals but 256 KB Flash, 64 KB SRAM, and UFBGA48 (4×4 mm) package - lacks CAN and one USART | Suitable for size-optimized BLE beacons where CAN is unused and Flash headroom is sufficient | Select when board area is critical and CAN interface is unnecessary; verify pin compatibility for existing UFBGA64 layout |
| STM32L476RGY6 | Higher-spec variant: 1 MB Flash, 128 KB SRAM, full-speed USB OTG, LCD controller, and extended temp range (−40°C to 105°C) | Targeted at feature-rich human-machine interfaces (HMIs) requiring display drivers and USB mass storage | Choose when future firmware expansion or USB device functionality is required; note larger QFN64 footprint and higher active current |
Compared with STM32L431CCU6, STM32L432KCU6 reduces package size and removes CAN at the cost of I/O count and peripheral flexibility, while STM32L476RGY6 trades ultra-low-power optimization for richer connectivity and memory - making the CCU6 optimal for balanced cost, size, and mixed-signal capability in battery-constrained edge nodes.
Availability
STM32L431CCU6 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 multi-year production cycles.
Supply support for STM32L431CCU6 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 MEMS sensors for industrial, automotive, and consumer markets.
The STM32L4 series targets ultra-low-power embedded applications demanding high performance-per-milliwatt, with the L431 specifically optimized for cost-sensitive, battery-operated devices needing rich analog integration and secure firmware execution.
FAQ
What is the maximum operating frequency and corresponding power consumption in Run mode?
The STM32L431CCU6 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 - verified per DS11453 Rev 3 Table 26 under VDD = 3.3 V, TA = 25 °C conditions.
Does STM32L431CCU6 support hardware encryption acceleration?
No, the STM32L431CCU6 does not integrate a dedicated cryptographic accelerator (e.g., AES, SHA, PKA). It relies on software libraries for encryption; however, its True Random Number Generator (RNG) meets NIST SP800-90B requirements and provides entropy for secure key derivation in TLS stacks.
Can the internal op-amp drive standard audio headphones directly?
No, the integrated op-amp is designed for signal conditioning (e.g., sensor amplification, filter stages) with rail-to-rail output swing but limited drive capability (typ. 20 mA short-circuit current). Driving 16 Ω headphones requires external Class AB or Class D amplifier circuitry per application note AN4913.
What debug interfaces are supported, and is SWD sufficient for full development?
The STM32L431CCU6 supports Serial Wire Debug (SWD) and JTAG via the SWJ-DP port. SWD is fully sufficient for all development tasks - including flash programming, real-time variable watch, breakpoint setting, and Embedded Trace Macrocell™-enabled instruction tracing - with only two pins (SWCLK, SWDIO) required versus JTAG's five.
STM32L431CCU6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 48-UFQFN Exposed Pad
- 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, 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:
STM32L431CCU6 FAQ
1.How can I place an order for STM32L431CCU6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L431CCU6 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 STM32L431CCU6 reliable?
The price and inventory of STM32L431CCU6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L431CCU6 is usually 5 days.
3.What payment methods are accepted for STM32L431CCU6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L431CCU6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L431CCU6?
STM32L431CCU6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L431CCU6 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 STM32L431CCU6?
For technical support, including STM32L431CCU6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L431CCU6 requirements.
6.How does Aetrix verify that STM32L431CCU6 is sourced from the original manufacturer or authorized distributors?
All STM32L431CCU6 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 STM32L431CCU6 meets industry standards.
7.What is the process for return or replacement of STM32L431CCU6?
All STM32L431CCU6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32L431CCU6, 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 STM32L431CCU6 part is unused and in its original packaging.
Return procedure for STM32L431CCU6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STM32L431CCU6 Tags
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