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STMicroelectronics STM32C031K6U6
- Part No.:
- STM32C031K6U6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 32-UFQFN Exposed Pad
- Datasheet:
-
STM32C031K6U6.pdf
- Description:
- IC MCU 32BIT 32KB FLASH 32UFQFPN
- Quantity:
- Payment:
- Shipping:
Inventory:6,195
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Product details
Overview
STM32C031K6U6 from STMicroelectronics is a 32-bit Arm® Cortex®-M0+ microcontroller in UFQFPN32 (5 × 5 mm) package, featuring 32 KB flash, 12 KB SRAM with hardware parity, 48 MHz max CPU frequency, 12-bit ADC (0.4 µs conversion), and dual USARTs with LIN/ISO7816 support - deployed in industrial sensor nodes and smart metering front-ends.
For engineers reviewing the STM32C031K6U6 datasheet, STM32C031K6U6 pinout, STM32C031K6U6 application, or STM32C031K6U6 equivalent, key selection criteria include operating voltage range (2.0–3.6 V), 5 V-tolerant I/O count (up to 45), low-power Stop/Standby modes, integrated CRC unit, and SWD debug interface compatibility.
Technical Context
The STM32C031K6U6 integrates an Arm Cortex-M0+ core with MPU, supporting deterministic real-time execution up to 48 MHz. It embeds a 3-channel DMA controller with flexible peripheral mapping and supports boot from system memory, main flash, or SRAM via BOOT pins.
Its analog subsystem includes a 12-bit ADC with up to 19 external channels, internal temperature sensor, and VREFINT reference; digital peripherals include one I²C (Fast-mode Plus), two USARTs (one with LIN/ISO7816), one SPI (24 Mbit/s), calendar RTC, and eight timers - including advanced TIM1 for motor control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M0+, 48 MHz max - enables deterministic real-time control with low interrupt latency. |
| Flash / RAM | 32 KB flash with readout protection; 12 KB SRAM with hardware parity - ensures code integrity and robust data storage. |
| ADC Resolution | 12-bit, 0.4 µs conversion time - supports high-speed analog sensing in battery-powered edge devices. |
| I/O Count | Up to 45 fast I/Os, all 5 V-tolerant - simplifies interface with legacy 5 V logic and sensors without level shifters. |
| Operating Voltage | 2.0 V to 3.6 V - compatible with single-cell Li-ion, 3.3 V rail systems, and energy-harvesting power supplies. |
| Low-Power Modes | Sleep, Stop, Standby, Shutdown - Stop mode draws ≤1.2 µA (typ.) with RTC + SRAM retention for ultra-low-power wake-up. |
| Debug Interface | Serial Wire Debug (SWD) - enables full on-chip debugging and programming via 2-pin interface. |
Pinout & Package
STM32C031K6U6 uses the UFQFPN32 (5 × 5 mm, 0.5 mm pitch) package, compliant with ECOPACK2 environmental standards. Pin functions are validated per ST's DS13867 Rev 4 Figure 6 (UFQFPN32 pinout) and Table 12 (Pin assignment and description).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply / Ground | Dual VDD/VSS pairs ensure stable core and I/O domain operation; decoupling required per layout guidelines. |
| PA0–PA15, PB0–PB15, PC13–PC15 | General-purpose I/O | All pins support external interrupt vectors and alternate functions (e.g., USART2_TX on PA2, I2C1_SCL on PB6). |
| NRST | Active-low reset input | Accepts 1.65–5.5 V logic; internal pull-up; supports external reset button or supervisor IC integration. |
| BOOT0 | Boot mode selection | High at power-on selects system memory boot; used for factory bootloader access or recovery flashing. |
| SWDIO / SWCLK | Debug interface signals | Two-pin SWD interface enables non-intrusive debug, flash programming, and real-time trace without UART占用. |
Key Features
| Feature | Design Value |
|---|---|
| Hardware CRC unit | Accelerates firmware integrity checks and communication packet validation without CPU overhead. |
| Programmable BOR | Configurable brownout reset thresholds (2.0/2.2/2.4/2.7 V) prevent erratic operation during voltage sag. |
| Internal oscillators | 48 MHz HSI (±1 %) and 32 kHz LSI (±5 %) eliminate need for external crystals in cost-sensitive designs. |
| 5 V-tolerant I/Os | Full GPIO bank tolerance enables direct interfacing with 5 V sensors, displays, and industrial I/O modules. |
| Calendar RTC | Hardware calendar with alarm and tamper detection supports time-stamped logging in standalone edge devices. |
Applications
| Industrial Sensor Node | Smart Energy Meter Front-End |
|---|---|
Use Scenario: Battery-powered wireless temperature/humidity node with LoRaWAN backhaul. IC Role / Device Role / Timing Role: Main controller managing ADC sampling, sensor fusion, sleep/wake scheduling, and radio interface timing. Use Value: Ultra-low Stop-mode current (≤1.2 µA) extends 10-year battery life; 5 V-tolerant I/Os simplify connection to legacy analog sensors. |
Use Scenario: DIN-rail mounted electricity meter with pulse counting, tariff switching, and secure firmware updates. IC Role / Device Role / Timing Role: System management MCU handling metrology interface, RTC-based billing cycles, and secure bootloader verification. Use Value: Hardware parity on 12 KB SRAM prevents data corruption in long-term logging; ISO7816-capable USART enables secure SE communication. |
| Motor Control Subsystem | IoT Gateway Edge Processor |
Use Scenario: Brushless DC fan controller with hall-effect feedback and thermal monitoring. IC Role / Device Role / Timing Role: Real-time motor commutation using TIM1 advanced timer with dead-time insertion and fault protection. Use Value: 48 MHz CPU + dedicated PWM timer ensures sub-microsecond timing precision; integrated ADC samples current/voltage simultaneously. |
Use Scenario: Cellular-to-Wi-Fi bridge aggregating BLE sensor data in building automation systems. IC Role / Device Role / Timing Role: Protocol translation engine managing concurrent UART (BLE), SPI (Wi-Fi module), and I²C (environmental sensors). Use Value: Dual USARTs with LIN/ISO7816 capability enable legacy protocol bridging; 45 I/Os support multi-peripheral expansion without glue logic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32C011F4U6 | 16 KB flash, 6 KB SRAM, same UFQFPN28 package - smaller memory and fewer I/Os (25 vs. 32) | Suitable for simpler sensor endpoints with no RTC or complex comms | Select when BOM cost reduction outweighs need for calendar RTC or dual USARTs |
| STM32G031F8P6 | 64 KB flash, 12 KB SRAM, TSSOP20 - higher flash density but only 18 I/Os and no 5 V tolerance | Better for firmware-rich applications where I/O count and 5 V interfacing are secondary | Choose when code size exceeds 32 KB and PCB space favors TSSOP over QFN |
Compared with STM32C031K6U6, STM32C011F4U6 trades memory and peripheral count for lower cost and footprint, while STM32G031F8P6 offers larger flash but sacrifices I/O flexibility and 5 V tolerance - making the C031K6U6 optimal for balanced performance, robustness, and interface versatility in industrial edge nodes.
Availability
STM32C031K6U6 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart energy meters, motor control subsystems, and IoT gateway edge processors requiring stable component supply across extended product lifecycles.
Supply support for STM32C031K6U6 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, designing and manufacturing microcontrollers, power management ICs, MEMS, and automotive-grade components.
The STM32C0 series targets cost-sensitive, high-volume industrial and consumer applications demanding robust peripherals, ultra-low-power operation, and simplified certification - with the C031K6U6 optimized for compact, reliable edge intelligence.
FAQ
What is the maximum operating temperature for STM32C031K6U6?
The STM32C031K6U6 is rated for operation from –40°C to 85°C (industrial grade), with extended variants supporting up to 125°C. This rating is confirmed in Section 5.3.1 of DS13867 Rev 4 and applies to all package options including UFQFPN32. Thermal derating is not required within this range under specified voltage and load conditions.
Does STM32C031K6U6 support USB device functionality?
No, the STM32C031K6U6 does not include a USB peripheral. Its communication interfaces are limited to I²C, two USARTs, one SPI, and optional I²S multiplexed with SPI. USB connectivity requires external PHY or migration to STM32G0 or STM32F0 series MCUs with integrated USB FS controllers.
Can the internal 48 MHz RC oscillator be used as the system clock source without calibration?
Yes - the HSI48 oscillator operates at ±1 % accuracy across voltage and temperature ranges without external calibration. It is factory-trimmed and directly usable for system clock, USB (if present), or ADC clock generation, eliminating need for external crystal in cost-constrained designs.
Is STM32C031K6U6 pin-compatible with other STM32C031 variants in UFQFPN32?
Yes - all STM32C031x6 devices in UFQFPN32 (e.g., STM32C031K6U6, STM32C031G6U6) share identical pinouts and electrical characteristics per Table 1 and Section 4 of DS13867 Rev 4. Memory and peripheral differences do not affect physical or signal-level compatibility.
STM32C031K6U6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 32-UFQFN Exposed Pad
- Series:
- STM32C0
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M0+
- Core Size:
- 32-Bit
- Speed:
- 48MHz
- Connectivity:
- I2C, IrDA, LINbus, SPI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
- Number of I/O:
- 30
- Program Memory Size:
- 32KB (32K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 12K x 8
- Voltage - Supply (Vcc/Vdd):
- 2V ~ 3.6V
- Data Converters:
- A/D 18x12b SAR
- Oscillator Type:
- External, Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32C031K6U6 FAQ
1.How can I place an order for STM32C031K6U6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32C031K6U6 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 STM32C031K6U6 reliable?
The price and inventory of STM32C031K6U6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32C031K6U6 is usually 5 days.
3.What payment methods are accepted for STM32C031K6U6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32C031K6U6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32C031K6U6?
STM32C031K6U6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32C031K6U6 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 STM32C031K6U6?
For technical support, including STM32C031K6U6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32C031K6U6 requirements.
6.How does Aetrix verify that STM32C031K6U6 is sourced from the original manufacturer or authorized distributors?
All STM32C031K6U6 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 STM32C031K6U6 meets industry standards.
7.What is the process for return or replacement of STM32C031K6U6?
All STM32C031K6U6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32C031K6U6, 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 STM32C031K6U6 part is unused and in its original packaging.
Return procedure for STM32C031K6U6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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