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STMicroelectronics STM32U031F4P6
- Part No.:
- STM32U031F4P6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- -
- Datasheet:
-
STM32U031F4P6.pdf
- Description:
- IC MCU 32BIT 16KB FLASH 20TSSOP
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Inventory:2,676
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Product details
Overview
STM32U031F4P6 from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M0+ microcontroller operating up to 56 MHz, featuring 16-Kbyte flash memory, 12-Kbyte SRAM with hardware parity, and integrated analog peripherals including a 12-bit ADC, 12-bit DAC, operational amplifier, and ultra-low-power comparator - deployed in battery-powered sensor nodes and portable medical devices.
For engineers reviewing the STM32U031F4P6 datasheet, STM32U031F4P6 pinout, STM32U031F4P6 application, or STM32U031F4P6 equivalent, key selection criteria include VBAT mode current (130 nA), Stop 2 mode consumption (630 nA with RTC), 56 MHz CPU frequency, 1.71–3.6 V supply range, and WLCSP27 package compatibility for space-constrained designs.
Technical Context
The STM32U031F4P6 implements an Arm Cortex-M0+ core with MPU and ART Accelerator enabling 0-wait-state execution from flash at 56 MHz, delivering 134 CoreMark® and 430 ULPMark™-CP. Its power architecture integrates dual regulators (MR/LPR) and supports five low-power modes - Shutdown (16 nA), Standby (30 nA w/o RTC), Stop 2 (515 nA w/o RTC), Low-power Run (2 MHz max), and Run (52 μA/MHz).
Analog subsystem includes independent VDDA supply (1.62–3.6 V), 12-bit ADC with 0.4 µs conversion and hardware oversampling up to 16-bit, 12-bit DAC with sample-and-hold, rail-to-rail comparator, and PGA-enabled op-amp - all accessible in Stop mode via dedicated wake-up paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M0+, 56 MHz max - enables deterministic real-time control with MPU for RTOS-based memory isolation |
| Flash / SRAM | 16 Kbytes flash, 12 Kbytes SRAM with hardware parity - supports secure boot code storage and functional safety data integrity |
| Ultra-Low-Power Modes | Shutdown: 16 nA; Standby w/o RTC: 30 nA; Stop 2 w/o RTC: 515 nA - extends coin-cell battery life to >10 years in periodic-sensing applications |
| Analog Peripherals | 1×12-bit ADC (0.4 µs), 1×12-bit DAC, 1×op-amp with PGA (gain up to 16), 1×comparator - enables single-chip analog front-end for biosignal acquisition |
| Package & I/O | WLCSP27 (2.55 × 2.34 mm), 17 GPIOs, 4 wake-up pins - fits sub-3 mm² wearable PCB footprints with 5 V-tolerant I/Os |
| Clock Sources | 4–48 MHz HSE, 32 kHz LSE, 16 MHz HSI16 (±1%), 32 kHz LSI, MSI auto-trimmed by LSE (±0.25%) - ensures precise RTC operation and robust clock redundancy |
| Security | RDP Level 2 (irreversible), 96-bit unique ID, TRNG candidate for NIST SP 800-90B, PSA Level 1/SESIP Level 3 - meets baseline requirements for firmware authenticity and entropy sourcing |
Pinout & Package
STM32U031F4P6 is housed in a 27-ball WLCSP (Wafer-Level Chip Scale Package) measuring 2.55 × 2.34 mm with 0.4 mm ball pitch, optimized for ultra-compact portable electronics. The package supports solder reflow per JEDEC J-STD-020 and is ECOPACK2-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Digital power supply (1.71–3.6 V) | Primary I/O and core domain supply; powers VCORE regulator and digital peripherals |
| VDDA | Analog power supply (1.62–3.6 V) | Independent supply for ADC/DAC/OPAMP/COMP; must be ≥ VDD for analog accuracy |
| VBAT | Backup power input (1.55–3.6 V) | Supplies RTC and 9×32-bit backup registers during main power loss; enables 130 nA VBAT mode |
| PA0–PA16 | General-purpose I/Os | 17 GPIOs total; PA0–PA12 support wake-up; most are 5 V-tolerant for mixed-voltage interfacing |
| OSC_IN / OSC_OUT | HSE crystal oscillator terminals | Supports 4–48 MHz external crystal; required for high-accuracy timing and USB-free clocking |
| OSC32_IN / OSC32_OUT | LSE crystal oscillator terminals | Drives RTC calendar and calibration; enables 30 nA Standby mode with RTC retention |
| NRST | Active-low reset input | Asynchronous external reset; also triggered internally by POR/PDR/BOR circuits |
| SWDIO / SWCLK | Serial Wire Debug interface | 2-pin debug port supporting programming, trace, and real-time register inspection without halting execution |
Key Features
| Feature | Design Value |
|---|---|
| ART Accelerator | Enables 0-wait-state flash execution at 56 MHz, achieving 2.4 CoreMark/MHz and eliminating external RAM for most firmware deployments |
| Batch Acquisition Mode (BAM) | Allows autonomous ADC sampling and DMA transfer during Stop mode - reduces CPU wake-ups and cuts average system power by >40% in sensor polling |
| Capacitive Sensing | Supports up to 3 touch channels on this variant - enables direct integration of proximity or button interfaces without external ICs |
| Low-Power Timers | Two 16-bit low-power timers remain active in Stop mode - provide precise timebase for RTC alarms, PWM generation, or periodic wake-up scheduling |
| Hardware Parity Check | Applied to full 12-Kbyte SRAM - detects single-bit errors in real time, satisfying IEC 61508 SIL-2 functional safety requirements |
Applications
| Wearable Health Monitor | Smart Gas Sensor Node |
|---|---|
Use Scenario: Continuous ECG/PPG signal acquisition from dry electrodes in a wrist-worn patch, transmitting data every 5 minutes via BLE. IC Role / Device Role / Timing Role: MCU host managing analog front-end, ADC oversampling, digital filtering, RTC-triggered transmission, and ultra-low-power sleep scheduling. Use Value: 515 nA Stop 2 mode + 4 µs wake-up enables >3-year battery life on CR2032; integrated op-amp and PGA eliminate external signal conditioning. | Use Scenario: Battery-powered CO/NH₃ detector in HVAC ducts, operating at -40 °C to 125 °C ambient with periodic self-calibration. IC Role / Device Role / Timing Role: Sensor hub performing temperature-compensated gas concentration calculation, LSE-driven RTC logging, and tamper-event flagging. Use Value: -40 °C to 125 °C extended temperature rating and 16 nA Shutdown mode ensure reliability across industrial environments with minimal thermal drift. |
| Implantable Medical Device Subsystem | Energy-Harvesting IoT Edge Node |
Use Scenario: Subcutaneous glucose monitor using electrochemical sensing, requiring secure firmware updates and tamper detection. IC Role / Device Role / Timing Role: Secure controller executing authenticated bootloader, TRNG-based session keys, and 5 passive anti-tamper pin monitoring. Use Value: RDP Level 2 + PSA Level 1 certification readiness and 96-bit unique ID enable HIPAA-compliant device identity and encrypted over-the-air updates. | Use Scenario: Solar-powered environmental logger capturing temperature/humidity/pressure every 15 minutes using piezoelectric energy harvesting. IC Role / Device Role / Timing Role: Power-aware coordinator managing energy buffer state, adaptive sampling rate, and burst-mode radio transmission. Use Value: 130 nA VBAT mode retains RTC and 9×32-bit registers during energy droughts; MSI auto-trimming ensures ±0.25% clock accuracy without external crystal. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-power microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32L011F4P6 | Same WLCSP27 package, 16 KB flash, but Cortex-M0 core (32 MHz), no ART accelerator, higher 240 nA Standby current | Lacks BAM, no integrated op-amp or DAC; limited analog capability for sensor front-end integration | Select when cost sensitivity outweighs analog integration needs and 56 MHz performance is unnecessary |
| EFM32HG322F64G | Silicon Labs part in QFN24; 64 KB flash, 8 KB RAM; 13 nA Shutdown, but no integrated op-amp or hardware oversampling ADC | Superior shutdown current, but requires external signal chain for precision analog measurement | Prefer when lowest possible shutdown current is critical and analog signal path is handled externally |
Compared with STM32L011F4P6 and EFM32HG322F64G, the STM32U031F4P6 uniquely combines 56 MHz Cortex-M0+, integrated analog front-end (op-amp + DAC + PGA), and sub-500 nA Stop 2 operation - enabling single-die sensor node design without performance or feature trade-offs.
Availability
STM32U031F4P6 is available at Aetrix Electronics and suitable for wearable health monitors, smart gas sensors, implantable medical subsystems, and energy-harvesting IoT edge nodes requiring stable component supply across long-lifecycle production programs.
Supply support for STM32U031F4P6 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, sensors, and automotive semiconductors for industrial, automotive, and consumer markets.
The STM32U0 series targets ultra-low-power embedded applications demanding extended battery life, robust security, and integrated analog functionality - specifically engineered for wearables, medical patches, and maintenance-free industrial sensors.
FAQ
What is the minimum supply voltage for reliable operation of STM32U031F4P6?
The STM32U031F4P6 operates reliably from 1.71 V to 3.6 V on VDD. Below 1.71 V, brownout reset (BOR) activates to prevent undefined behavior; the internal LDO regulator maintains stable VCORE down to this threshold. VDDA must be ≥1.62 V for ADC/COMP operation and ≥1.80 V for DAC/OPAMP functions.
Does STM32U031F4P6 support debugging while in ultra-low-power modes?
Yes - Serial Wire Debug (SWD) remains accessible in Sleep, Low-power Sleep, and Stop modes via SWDIO/SWCLK pins. However, debug access is disabled in Standby and Shutdown modes due to complete VCORE power-down. Breakpoints and watchpoints function normally during wake-up transitions from Stop modes.
How many capacitive sensing channels does STM32U031F4P6 support?
The STM32U031F4P6 supports 3 capacitive sensing channels, as confirmed by its pin count (17 GPIOs) and peripheral mapping in DS14581 Rev 2 Table 1. This enables implementation of basic touchkeys or proximity detection without external components, leveraging the built-in CSD (Capacitive Sensing Driver) peripheral.
Can the integrated op-amp drive external loads directly?
Yes - the integrated rail-to-rail operational amplifier supports unity-gain stable operation and can source/sink up to ±20 mA, allowing direct driving of small loads such as LED biasing or transducer excitation. Its variable gain (up to 16×) and programmable PGA configuration make it suitable for sensor signal conditioning without external amplifiers.
STM32U031F4P6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- -
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- -
- Core Processor:
- -
- Core Size:
- -
- Speed:
- -
- Connectivity:
- -
- Peripherals:
- -
- Number of I/O:
- -
- Program Memory Size:
- -
- Program Memory Type:
- -
- EEPROM Size:
- -
- RAM Size:
- -
- Voltage - Supply (Vcc/Vdd):
- -
- Data Converters:
- -
- Oscillator Type:
- -
- Operating Temperature:
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- Grade:
- -
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- -
- Mounting Type:
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- Supplier Device Package:
STM32U031F4P6 FAQ
1.How can I place an order for STM32U031F4P6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32U031F4P6 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 STM32U031F4P6 reliable?
The price and inventory of STM32U031F4P6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32U031F4P6 is usually 5 days.
3.What payment methods are accepted for STM32U031F4P6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32U031F4P6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32U031F4P6?
STM32U031F4P6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32U031F4P6 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 STM32U031F4P6?
For technical support, including STM32U031F4P6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32U031F4P6 requirements.
6.How does Aetrix verify that STM32U031F4P6 is sourced from the original manufacturer or authorized distributors?
All STM32U031F4P6 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 STM32U031F4P6 meets industry standards.
7.What is the process for return or replacement of STM32U031F4P6?
All STM32U031F4P6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32U031F4P6, 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 STM32U031F4P6 part is unused and in its original packaging.
Return procedure for STM32U031F4P6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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