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STMicroelectronics STM32L031C6T6
- Part No.:
- STM32L031C6T6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
STM32L031C6T6.pdf
- Description:
- IC MCU 32BIT 32KB FLASH 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,283
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Product details
Overview
STM32L031C6T6 from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M0+ microcontroller in a 48-pin LQFP package, featuring 32 KB Flash, 8 KB SRAM, 1 KB EEPROM with ECC, 12-bit ADC (1.14 Msps), and dual ultra-low-power comparators. It operates from 1.65 V to 3.6 V across –40 °C to +125 °C and delivers 76 µA/MHz in Run mode - ideal for battery-powered sensor nodes and smart metering endpoints.
For engineers reviewing the STM32L031C6T6 datasheet, STM32L031C6T6 pinout, STM32L031C6T6 application, or STM32L031C6T6 equivalent, key selection criteria include standby current (0.23 µA), RTC+RAM retention capability (0.6 µA), 5 µs Flash wakeup time, and 31 I/Os with 5V tolerance - critical for energy-constrained industrial and IoT edge devices.
Technical Context
The STM32L031C6T6 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) with hierarchical wakeup paths.
Analog subsystem includes a 10-channel 12-bit ADC operating down to 1.65 V, two comparators with window mode and wake-up capability, and internal voltage reference (VREFINT) with factory calibration. Memory protection covers sector-level Flash/EERPOM write/erase lock and 20-byte backup registers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Arm Cortex-M0+, 32 MHz max - enables deterministic real-time control with <1-cycle branch and Thumb-2 instruction set. |
| Flash / RAM / EEPROM | 32 KB Flash (ECC), 8 KB SRAM, 1 KB EEPROM (ECC) - supports robust firmware storage, runtime data buffering, and nonvolatile parameter retention. |
| ADC | 12-bit, 1.14 Msps, 10 channels - delivers high-resolution sensor acquisition at 10 ksps with 41 µA typical current draw. |
| Low-power Modes | 0.23 µA Standby (2 wakeup pins), 0.6 µA Stop+RTC+8KB RAM - enables multi-year operation on coin-cell batteries. |
| Supply Range | 1.65 V to 3.6 V - compatible with single-cell Li-ion, Li-SOCl₂, and 3.3 V regulated systems without external LDO. |
| I/O Count & Tolerance | 38 fast I/Os (31 5V-tolerant) - simplifies interface to legacy 5 V logic and mixed-voltage peripherals. |
| Timers | 8 timers including 1x 16-bit advanced, 2x 16-bit general-purpose, 1x ultra-low-power LPTIM, RTC, SysTick - supports precise timing, PWM generation, and calendar functions. |
Pinout & Package
LQFP48 package (7 × 7 mm, 0.5 mm pitch), ECOPACK®2-compliant, with exposed pad for thermal enhancement and mechanical stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Main power supply (1.65–3.6 V) | Supplies core, analog, and I/O domains; requires local 100 nF decoupling per VDD pin. |
| VSS | Ground reference | Common return path; multiple VSS pins reduce ground bounce in mixed-signal operation. |
| NRST | Active-low reset input | Asynchronous reset with internal pull-up; accepts 1.65–3.6 V logic levels and supports external push-button or supervisor IC. |
| PA0–PA15 | General-purpose I/Os | Configurable as GPIO, ADC inputs, timer channels, or UART/SPI/I²C alternate functions; PA0–PA7 support wakeup from Stop/Standby. |
| PC13–PC15 | Low-power oscillator pins | Connect 32.768 kHz crystal for RTC; PC14/PC15 have built-in load capacitors (12.5 pF) and calibration trim. |
| BOOT0 | Boot mode selection | High at reset enables system memory bootloader (USART/SPI); tied low for normal Flash execution. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power BOR | 5 selectable brownout thresholds (1.62–2.5 V) - ensures reliable reset during battery sag without external supervisor. |
| Pre-programmed bootloader | Factory-loaded USART/SPI bootloader - enables field firmware updates without debug probe or SWD interface. |
| Serial wire debug (SW-DP) | 2-pin SWDIO/SWCLK interface - provides full debug visibility (breakpoints, watchpoints, memory access) with minimal PCB footprint. |
| DMA controller | 7-channel peripheral-to-memory/mem-to-mem DMA - offloads CPU during ADC sampling, SPI transfers, and UART streaming. |
| CRC calculation unit | Hardware CRC-32 engine - accelerates firmware integrity checks and communication packet validation in real 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 controller managing sensor acquisition (ADC, comparators), RTC-based billing intervals, and low-power radio coexistence. Use Value: 0.6 µA Stop+RTC+RAM retention extends 10-year battery life; 5 µs wakeup ensures rapid response to flow pulses. | Use Scenario: Industrial vibration monitor using MEMS accelerometer, local FFT processing, and BLE notification. IC Role / Device Role / Timing Role: Edge intelligence node executing sensor fusion algorithms, managing sleep/wakeup cycles, and driving BLE stack timing. Use Value: 76 µA/MHz efficiency enables continuous sensing at 100 Hz while maintaining >5-year coin-cell operation. |
| Portable Medical Device | Asset Tracking Tag |
Use Scenario: Handheld glucose meter with electrochemical strip interface, LCD driver, and USB charging detection. IC Role / Device Role / Timing Role: System-on-chip handling analog front-end (comparator-based strip detection), display timing, and USB enumeration. Use Value: Dual comparators with window mode detect strip insertion and reaction endpoint without CPU intervention - reducing active time by >40%. | Use Scenario: GPS-enabled logistics tag reporting location every 6 hours via NB-IoT, with motion-triggered wake-up. IC Role / Device Role / Timing Role: Power manager coordinating GPS fix, cellular transmission, and deep-sleep scheduling. Use Value: 0.23 µA Standby with 2 dedicated wakeup pins enables motion-triggered reporting while minimizing quiescent drain. |
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 RAM, no EEPROM, same LQFP32 package | Lower memory capacity limits complex sensor fusion or OTA update staging | Select when cost-sensitive designs require basic low-power control without EEPROM or extended RAM. |
| STM32L053R8T6 | 64 KB Flash, 8 KB RAM, 2 KB EEPROM, USB 2.0 FS device, LQFP64 | Includes USB PHY and larger memory - adds BOM cost and board area | Choose when USB-based configuration, firmware update, or higher code density is required. |
Compared with STM32L011K4T6, the STM32L031C6T6 adds EEPROM for calibrated sensor storage and 32 KB Flash for feature-rich firmware; versus STM32L053R8T6, it trades USB and extra Flash for lower cost and smaller footprint - making it optimal for space- and budget-constrained battery endpoints.
Availability
STM32L031C6T6 is available at Aetrix Electronics and suitable for smart metering, wireless sensor networks, portable medical devices, and asset tracking tags requiring stable component supply across extended product lifecycles.
Supply support for STM32L031C6T6 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 analog components for industrial, automotive, and consumer markets.
The STM32L0 series targets ultra-low-power embedded applications demanding multi-year battery life, wide temperature operation, and integrated analog peripherals - optimized for IoT edge nodes and energy-harvesting systems.
FAQ
What is the maximum operating frequency and core type of the STM32L031C6T6?
The STM32L031C6T6 features an Arm Cortex-M0+ core rated for up to 32 MHz operation. It achieves 0.95 DMIPS/MHz performance with Thumb-2 instruction set support and single-cycle I/O access. The core includes a nested vectored interrupt controller (NVIC), SysTick timer, and hardware divide/modulo units - enabling deterministic real-time response in resource-constrained environments.
Does the STM32L031C6T6 support hardware encryption or secure boot?
No, the STM32L031C6T6 does not integrate hardware cryptographic accelerators (AES, SHA, PKA) or secure boot functionality. It lacks a true random number generator (TRNG), secure memory isolation, or tamper-detection circuits. For applications requiring firmware authenticity or data confidentiality, external secure elements or higher-series MCUs (e.g., STM32L5) must be used.
Can the STM32L031C6T6 drive a standard 5 V logic interface directly?
Yes - 31 of its 38 I/Os are 5V-tolerant when configured as inputs, meaning they safely accept 0–5 V signals while powered from 1.65–3.6 V. However, output voltage swing is limited to VDD (max 3.6 V), so direct 5 V logic level shifting requires external buffers or resistive dividers for bidirectional interfaces.
What debug interfaces are supported, and is SWD available in all packages?
The STM32L031C6T6 supports Serial Wire Debug (SWD) via dedicated SWDIO and SWCLK pins - available in all packages including LQFP48. No JTAG support is provided. SWD enables full debugging (halt/run, breakpoints, memory inspection) with only two signal lines and no target-side clock requirement, making it ideal for space-constrained PCB layouts.
STM32L031C6T6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 48-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:
- 38
- 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:
STM32L031C6T6 FAQ
1.How can I place an order for STM32L031C6T6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L031C6T6 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 STM32L031C6T6 reliable?
The price and inventory of STM32L031C6T6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L031C6T6 is usually 5 days.
3.What payment methods are accepted for STM32L031C6T6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L031C6T6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L031C6T6?
STM32L031C6T6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L031C6T6 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 STM32L031C6T6?
For technical support, including STM32L031C6T6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L031C6T6 requirements.
6.How does Aetrix verify that STM32L031C6T6 is sourced from the original manufacturer or authorized distributors?
All STM32L031C6T6 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 STM32L031C6T6 meets industry standards.
7.What is the process for return or replacement of STM32L031C6T6?
All STM32L031C6T6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32L031C6T6, 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 STM32L031C6T6 part is unused and in its original packaging.
Return procedure for STM32L031C6T6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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