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STMicroelectronics STM32C031G6U3
- Part No.:
- STM32C031G6U3
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 28-UFQFN
- Datasheet:
-
STM32C031G6U3.pdf
- Description:
- IC MCU 32BIT 32KB FLASH 28UFQFPN
- Quantity:
- Payment:
- Shipping:
Inventory:4,263
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Product details
Overview
STM32C031G6U3 from STMicroelectronics is a 32-bit Arm® Cortex®-M0+ microcontroller in UFQFPN28 package, featuring 32 KB flash, 12 KB SRAM with hardware parity, 48 MHz max CPU frequency, and integrated 12-bit ADC (0.4 µs conversion), two USARTs (one with LIN/ISO7816), I²C Fast-mode Plus, SPI, RTC, and 45 5 V-tolerant GPIOs - deployed in industrial sensor nodes and smart metering front-ends.
For engineers reviewing the STM32C031G6U3 datasheet, STM32C031G6U3 pinout, STM32C031G6U3 application, or STM32C031G6U3 equivalent, key selection criteria include operating voltage range (2.0–3.6 V), -40°C to 125°C extended temperature grade, low-power Stop/Standby modes with wake-up capability, and ECOPACK2-compliant packaging for high-reliability embedded control.
Technical Context
The STM32C031G6U3 implements an Arm Cortex-M0+ core with Memory Protection Unit (MPU), supporting deterministic real-time execution and secure peripheral access control. It integrates a 48 MHz internal RC oscillator (±1 %) and dual crystal oscillators (4–48 MHz HSE, 32 kHz LSE), enabling precise clock tree configuration for time-critical peripherals like RTC and USART auto-baud detection.
Its analog subsystem includes a 12-bit ADC with up to 19 external channels, hardware-calibrated temperature sensor, and internal voltage reference (VREFINT), all operating across full supply and temperature range. The DMA controller supports flexible channel mapping to offload CPU during high-throughput data transfers from ADC, USART, or SPI.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M0+, 48 MHz max - enables deterministic real-time control with <10 ns interrupt latency for motor commutation or fast-loop feedback. |
| Memory | 32 KB flash (with readout protection), 12 KB SRAM (hardware parity) - sufficient for bootloader + application firmware with error-detection safety integrity. |
| ADC | 12-bit, 0.4 µs conversion, 19-channel input - supports simultaneous sampling of multiple sensors (e.g., current, voltage, temperature) in power monitoring systems. |
| Communication | 2× USART (1 with LIN/ISO7816), 1× I²C Fast-mode Plus (1 Mbit/s), 1× SPI (24 Mbit/s) - meets industrial fieldbus interface requirements including smart grid communication protocols. |
| Power Range | 2.0 V to 3.6 V supply, -40°C to 125°C operation - validated for automotive under-hood and industrial ambient environments without derating. |
| GPIO | Up to 45 pins, all 5 V-tolerant, mappable to external interrupts - simplifies level-shifting design and enables direct interfacing with legacy 5 V logic or sensors. |
| Low-Power Modes | Sleep, Stop, Standby, Shutdown - Stop mode draws ≤1.2 µA (typ.) with RTC + 8 KB RAM retention, enabling battery-powered endpoint longevity >5 years. |
Pinout & Package
STM32C031G6U3 uses a 28-pin Ultra-Fine Pitch Quad Flat No-lead (UFQFPN28) package, 4 mm × 4 mm, 0.5 mm pitch, with exposed thermal pad for enhanced thermal dissipation in compact PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual VDD/VSS pairs ensure stable core and I/O domain decoupling; exposed thermal pad must be soldered to PCB ground plane. |
| PA0–PA15, PB0–PB12 | General-purpose I/O | All pins support alternate functions (USART, SPI, I²C, timers); PA0–PA3 also serve as ADC inputs and RTC calibration outputs. |
| NRST | Active-low reset input | Accepts 1.65–5.5 V logic; internal pull-up; compatible with open-drain reset supervisors and manual push-button circuits. |
| BOOT0 | Boot mode selection | High at power-up selects system memory bootloader; tied low via 10 kΩ resistor to VSS for normal flash execution. |
| OSC_IN / OSC_OUT | HSE crystal oscillator interface | Supports 4–48 MHz external crystals; internal load capacitors configurable via option bytes - eliminates need for external caps in cost-sensitive designs. |
Key Features
| Feature | Design Value |
|---|---|
| Hardware CRC calculation unit | Accelerates firmware image integrity checks and communication packet validation without CPU overhead. |
| Programmable brownout reset (BOR) | Three selectable thresholds (2.1/2.4/2.7 V) enable robust operation during brownout events in unregulated power supplies. |
| Calendar RTC with alarm | Retains time/date across Stop mode using LSE or LSI; alarm output triggers EXTI for scheduled wake-up or event logging. |
| I²C Fast-mode Plus (1 Mbit/s) | Integrated current sink allows direct connection to 5 V bus without external level shifters - reduces BOM count in mixed-voltage systems. |
| Serial wire debug (SWD) | 2-pin debug interface (SWCLK/SWDIO) supports full programming, tracing, and real-time variable inspection in production test and field updates. |
Applications
| Industrial Sensor Node | Smart Energy Meter Front-End |
|---|---|
Use Scenario: Compact environmental monitoring node measuring temperature, humidity, and air quality with wireless telemetry. IC Role / Device Role / Timing Role: Central MCU managing multi-sensor acquisition, local data fusion, and UART-to-LoRaWAN gateway interface. Use Value: 12-bit ADC with hardware oversampling and 45 GPIOs enable direct sensor interfacing; Stop mode current ≤1.2 µA extends coin-cell life beyond 5 years. |
Use Scenario: Residential electricity meter with pulse counting, tariff switching, and tamper detection. IC Role / Device Role / Timing Role: Real-time energy computation engine with calendar RTC for billing cycles and ISO7816-capable USART for metrology certification interface. Use Value: Integrated ISO7816 physical layer eliminates external transceiver; 125°C rating ensures reliability inside sealed meter enclosures. |
| Motor Control Actuator | PLC Digital I/O Module |
Use Scenario: Brushless DC motor driver for HVAC blower with Hall-effect commutation and fault reporting. IC Role / Device Role / Timing Role: Timing-critical PWM generator with advanced timer (TIM1) and ADC-triggered current sensing loop. Use Value: 48 MHz CPU + dedicated advanced-control timer achieves <1 µs PWM resolution; 5 V-tolerant GPIOs interface directly with optocoupled gate drivers. |
Use Scenario: DIN-rail mounted digital input/output expansion module for industrial automation controllers. IC Role / Device Role / Timing Role: Isolated I/O aggregator with SPI slave interface to main PLC CPU and watchdog supervision. Use Value: Dual USARTs support Modbus RTU master/slave simultaneously; programmable BOR prevents spurious resets during factory EMI events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32C011F4T6 | 24 KB flash, 8 KB SRAM, TSSOP20 (20-pin), no RTC calendar, no USB | Limited peripheral count and memory; suitable only for ultra-low-cost discrete I/O control | Select when footprint and BOM cost outweigh need for RTC, ADC channels, or communication flexibility. |
| STM32G031F8P6 | 64 KB flash, 12 KB SRAM, TSSOP20, same core but higher flash density and enhanced crypto acceleration | Includes AES-128 and public-key accelerator; targets secure firmware update and encrypted sensor data | Choose when cryptographic operations or larger OTA firmware images are required in same pinout. |
Compared with STM32C011F4T6, the STM32C031G6U3 delivers +33% flash, integrated RTC, and 19-channel ADC - essential for time-stamped sensor fusion. Versus STM32G031F8P6, it trades crypto acceleration for lower cost and identical low-power performance, making it optimal for cost-sensitive industrial control where security is handled externally.
Availability
STM32C031G6U3 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart energy meter front-ends, and motor control actuators requiring stable component supply across extended temperature and long product lifecycles.
Supply support for STM32C031G6U3 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 devices for industrial, automotive, and consumer markets.
The STM32C0 series targets cost-optimized, high-reliability embedded control applications - emphasizing ultra-low-power operation, extended temperature resilience, and simplified qualification for industrial equipment and smart infrastructure.
FAQ
What is the maximum operating temperature specification for STM32C031G6U3?
The STM32C031G6U3 is qualified for operation from -40°C to +125°C ambient temperature, verified per JEDEC JESD22-A108 and supported by full electrical characterization across this range - including flash endurance, ADC accuracy, and oscillator stability - making it suitable for under-hood automotive and industrial enclosure deployments.
Does STM32C031G6U3 support hardware-based cryptographic functions?
No, the STM32C031G6U3 does not integrate hardware cryptographic accelerators (e.g., AES, SHA, PKA). It relies on software libraries for basic encryption; for secure boot or TLS stack acceleration, ST's STM32G0 or STM32L5 families are recommended alternatives with dedicated crypto peripherals.
Can the internal 48 MHz RC oscillator be used as the system clock without external components?
Yes, the HSI48 oscillator is factory-trimmed to ±1 % accuracy and can drive the system clock directly - eliminating need for external crystal in cost-sensitive applications. It supports USB clock generation and is automatically selected after reset unless overridden by clock configuration registers.
What debug interface does STM32C031G6U3 provide, and what pins are required?
The device provides Serial Wire Debug (SWD) with two dedicated pins: SWCLK (PA14) and SWDIO (PA13). No additional pins are needed for reset or trace; SWD supports full JTAG-equivalent functionality including flash programming, breakpoint setting, and real-time memory inspection via standard CMSIS-DAP or ST-LINK tools.
STM32C031G6U3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 28-UFQFN
- Series:
- STM32C0
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- -
- Core Processor:
- ARM® Cortex®-M0+
- Core Size:
- 32-Bit
- Speed:
- 48MHz
- Connectivity:
- I2C, IrDA, LINbus, SMBus, SPI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, DMA, LCD, POR, PWM, WDT
- Number of I/O:
- 26
- 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 17x12b SAR
- Oscillator Type:
- External, Internal
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32C031G6U3 FAQ
1.How can I place an order for STM32C031G6U3 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32C031G6U3 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 STM32C031G6U3 reliable?
The price and inventory of STM32C031G6U3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32C031G6U3 is usually 5 days.
3.What payment methods are accepted for STM32C031G6U3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32C031G6U3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32C031G6U3?
STM32C031G6U3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32C031G6U3 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 STM32C031G6U3?
For technical support, including STM32C031G6U3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32C031G6U3 requirements.
6.How does Aetrix verify that STM32C031G6U3 is sourced from the original manufacturer or authorized distributors?
All STM32C031G6U3 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 STM32C031G6U3 meets industry standards.
7.What is the process for return or replacement of STM32C031G6U3?
All STM32C031G6U3 units undergo pre-shipment inspection (PSI). If there is an issue with STM32C031G6U3, 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 STM32C031G6U3 part is unused and in its original packaging.
Return procedure for STM32C031G6U3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STM32C031G6U3 Tags
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