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STMicroelectronics STM32L031K6T6
- Part No.:
- STM32L031K6T6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 32-LQFP
- Datasheet:
-
STM32L031K6T6.pdf
- Description:
- IC MCU 32BIT 32KB FLASH 32LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,025
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Product details
Overview
STM32L031K6T6 from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M0+ microcontroller in UFQFPN32 (5 × 5 mm) package, featuring 32 KB Flash with ECC, 8 KB SRAM, 1 KB EEPROM, 12-bit ADC (1.14 Msps), and dual ultra-low-power comparators. It operates from 1.65–3.6 V across –40 to +125 °C and delivers 76 µA/MHz in Run mode - optimized for battery-powered sensor nodes and smart meters.
For engineers reviewing the STM32L031K6T6 datasheet, STM32L031K6T6 pinout, STM32L031K6T6 application, or STM32L031K6T6 equivalent, key selection criteria include standby current (0.23 µA), RTC + 8 KB RAM retention (0.6 µA), 5 µs Flash wakeup time, and 31 I/Os with 5V tolerance - critical for energy-constrained embedded control.
Technical Context
The STM32L031K6T6 integrates a Cortex-M0+ core running up to 32 MHz with dynamic voltage scaling, supported by multiple clock sources: 16 MHz factory-trimmed HSI (±1%), 32 kHz LSE for RTC calibration, and PLL for CPU clock generation. Its low-power architecture includes five operational modes (Run, Sleep, Low-power Run/Sleep, Stop, Standby), each with distinct peripheral enablement and current profiles.
Memory subsystem includes ECC-protected Flash and EEPROM, 20-byte backup registers, and sector write protection. Analog peripherals are fully functional down to 1.65 V: 12-bit ADC supports up to 10 channels at 10 ksps (41 µA), while two comparators offer window mode detection and wake-up capability - enabling autonomous analog event handling without CPU intervention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Arm Cortex-M0+, 32 MHz max - delivers 0.95 DMIPS/MHz for deterministic real-time control |
| Flash / SRAM / EEPROM | 32 KB Flash (ECC), 8 KB SRAM, 1 KB EEPROM (ECC) - enables robust firmware storage and nonvolatile data logging |
| Supply Voltage Range | 1.65 V to 3.6 V - supports direct Li-ion/Li-SOCl₂ battery operation without external regulation |
| Standby Current | 0.23 µA with 2 wakeup pins - extends 10-year battery life in always-on sensing applications |
| ADC Performance | 12-bit, 1.14 Msps, 10-channel, 41 µA @ 10 ksps - provides high-resolution signal acquisition at ultra-low power |
| Temperature Range | –40 °C to +125 °C - qualified for industrial and automotive under-hood environments |
| I/O Count & Tolerance | 31 GPIOs, 5V tolerant - simplifies interface with legacy 5V peripherals and reduces level-shifter count |
Pinout & Package
STM32L031K6T6 uses the UFQFPN32 (5 × 5 mm, 0.5 mm pitch) package per ST's DS10668 Rev 6, Table 72. Pin functions are validated against Section 4 ("Pin descriptions") and Table 15 ("Pin definitions") of the official datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual VDD/VSS pairs ensure stable core and I/O domain operation; decoupling required per datasheet layout guidelines |
| PA0–PA15, PB0–PB12 | General-purpose I/O | 31 total GPIOs; PA0–PA7 support ADC input; PB3/PB4 configurable as JTAG/SW-DP debug pins |
| NRST | Active-low reset | Asynchronous reset input with internal pull-up; accepts 1.65–3.6 V logic levels |
| BOOT0 | Boot mode selection | High at power-up enters system memory bootloader (USART/SPI); low boots from user Flash |
| OSC_IN / OSC_OUT | External crystal oscillator interface | Supports 1–25 MHz crystals; optional for precise timing or RTC calibration via 32 kHz LSE |
| VREF+ / VREF– | ADC reference inputs | Enable external reference for improved ADC accuracy; internal VREFINT available as alternative |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power Stop mode + RTC + 8 KB RAM retention | 0.6 µA - preserves full RAM content and real-time clock during extended sleep, enabling instant resume |
| Pre-programmed USART/SPI bootloader | No external programmer required - field firmware updates via serial interface using standard ST tools |
| Serial wire debug (SW-DP) | Single-pin debug interface - reduces PCB footprint vs JTAG and supports full run-control and trace |
| Dual ultra-low-power comparators | Operate down to 1.65 V with window mode and wake-up capability - replace discrete analog front-ends in threshold-detection systems |
| 7-channel DMA controller | Offloads ADC, SPI, I²C, USART, and timer transfers - eliminates CPU polling and reduces active time |
Applications
| Smart Utility Metering | Wireless Sensor Node |
|---|---|
Use Scenario: Battery-powered gas/water meter with pulse counting, temperature compensation, and LoRaWAN backhaul. IC Role / Device Role / Timing Role: Main system controller managing sensor acquisition (ADC, comparators), RTC-based billing intervals, and low-power radio interface timing. Use Value: 0.23 µA Standby current and 5 µs Flash wakeup enable >10-year battery life with periodic wake-ups every 15 minutes. | Use Scenario: Indoor environmental monitor (temp/humidity/CO₂) transmitting data hourly via BLE or NB-IoT. IC Role / Device Role / Timing Role: Central MCU coordinating multi-sensor reads, data preprocessing, and scheduled RF transmission bursts. Use Value: 1 KB EEPROM stores calibration coefficients and event logs; 31 5V-tolerant I/Os simplify connection to diverse analog/digital sensors. |
| Industrial Edge Controller | Medical Wearable |
Use Scenario: DIN-rail mounted PLC module monitoring 4–20 mA loops and digital inputs in factory automation. IC Role / Device Role / Timing Role: Real-time I/O processor with deterministic timer interrupts, watchdog supervision, and isolated communication interfaces. Use Value: –40 to +125 °C rating ensures reliability in uncontrolled enclosures; dual watchdogs (IWDG + WWDG) meet SIL-2 functional safety requirements. | Use Scenario: ECG patch with motion artifact rejection, heart-rate calculation, and Bluetooth LE telemetry. IC Role / Device Role / Timing Role: Signal acquisition engine performing analog front-end conditioning (comparators), ADC sampling, and real-time DSP filtering. Use Value: 12-bit ADC with 1.14 Msps resolution captures high-fidelity biopotentials; ultra-low-power Stop mode extends wearable runtime between charges. |
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 |
|---|---|---|---|
| STM32L011K4T6 | 16 KB Flash, 2 KB SRAM, no EEPROM, same package and core | Lacks EEPROM and reduced RAM limits persistent data storage and complex state management | Select when firmware size <16 KB and EEPROM not required for calibration or event logging |
| STM32L051K8U6 | 64 KB Flash, 8 KB SRAM, 2 KB EEPROM, USB 2.0 interface | Includes USB PHY and higher memory - adds BOM cost and power overhead for non-USB use cases | Choose only if native USB device functionality or >32 KB code space is mandatory |
Compared with STM32L011K4T6, the STM32L031K6T6 adds 1 KB EEPROM and doubles Flash capacity - essential for field-upgradable firmware and sensor calibration persistence. Versus STM32L051K8U6, it omits USB but reduces active and standby current, making it optimal for cost- and power-sensitive battery applications without host connectivity.
Availability
STM32L031K6T6 is available at Aetrix Electronics and suitable for smart utility metering, wireless sensor nodes, industrial edge controllers, and medical wearables requiring stable component supply across long product lifecycles.
Supply support for STM32L031K6T6 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 analog components for industrial, automotive, and consumer markets.
The STM32L0 series targets ultra-low-power embedded applications - emphasizing sub-µA standby, fast wake-up, and integrated analog peripherals to minimize external component count in battery-operated devices.
FAQ
Does STM32L031K6T6 support hardware CRC calculation?
Yes. The device integrates a dedicated cyclic redundancy check (CRC) calculation unit compliant with IEEE-802.3, enabling fast and deterministic checksum generation for firmware integrity verification and communication packet validation without CPU load.
What debug interfaces are available on STM32L031K6T6?
It supports Serial Wire Debug (SW-DP) only - a 2-pin (SWDIO, SWCLK) interface compatible with ST-LINK/V2 and other ARM-compliant debug probes. JTAG is not implemented; SW-DP provides full run-control, memory access, and basic trace capabilities.
Can the internal 16 MHz RC oscillator be used as the system clock without calibration?
Yes. The HSI16 oscillator is factory-trimmed to ±1% accuracy across voltage and temperature, allowing immediate use as the system clock source without external crystal or runtime calibration - ideal for cost-sensitive designs where timing precision ≤1% is acceptable.
Is the 1 KB EEPROM truly EEPROM or emulated in Flash?
It is true hardware EEPROM - physically separate from Flash memory, with independent read/write cycles, 100,000 write/erase endurance, and 40-year data retention at 55 °C per ST specification (DS10668 Table 47). Unlike Flash-emulated EEPROM, it supports byte-level writes and concurrent read/write operations.
STM32L031K6T6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 32-LQFP
- Series:
- STM32L0
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M0+
- Core Size:
- 32-Bit Single-Core
- Speed:
- 32MHz
- Connectivity:
- I2C, IrDA, LINbus, SPI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, DMA, POR, PWM, WDT
- Number of I/O:
- 25
- Program Memory Size:
- 32KB (32K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 1K x 8
- RAM Size:
- 8K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 3.6V
- Data Converters:
- A/D 10x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32L031K6T6 FAQ
1.How can I place an order for STM32L031K6T6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L031K6T6 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 STM32L031K6T6 reliable?
The price and inventory of STM32L031K6T6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L031K6T6 is usually 5 days.
3.What payment methods are accepted for STM32L031K6T6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L031K6T6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L031K6T6?
STM32L031K6T6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L031K6T6 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 STM32L031K6T6?
For technical support, including STM32L031K6T6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L031K6T6 requirements.
6.How does Aetrix verify that STM32L031K6T6 is sourced from the original manufacturer or authorized distributors?
All STM32L031K6T6 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 STM32L031K6T6 meets industry standards.
7.What is the process for return or replacement of STM32L031K6T6?
All STM32L031K6T6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32L031K6T6, 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 STM32L031K6T6 part is unused and in its original packaging.
Return procedure for STM32L031K6T6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STM32L031K6T6 Tags
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