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STMicroelectronics STM32C031C4U6
- Part No.:
- STM32C031C4U6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 48-UFQFN Exposed Pad
- Datasheet:
-
STM32C031C4U6.pdf
- Description:
- IC MCU 32BIT 16KB FLASH 48UFQFPN
- Quantity:
- Payment:
- Shipping:
Inventory:4,759
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Product details
Overview
STM32C031C4U6 from STMicroelectronics is a 32-bit Arm® Cortex®-M0+ microcontroller in UFQFPN48 package, operating up to 48 MHz with 32 KB flash and 12 KB SRAM. It integrates dual USARTs (one with LIN/ISO7816), I²C Fast-mode Plus, SPI, 12-bit ADC (19 channels), eight timers including advanced motor control timer TIM1, and RTC with alarm - deployed in industrial sensor nodes and smart metering front-ends.
For engineers reviewing the STM32C031C4U6 datasheet, STM32C031C4U6 pinout, STM32C031C4U6 application, or STM32C031C4U6 equivalent, key selection criteria include its 48 MHz CPU frequency, 5 V-tolerant GPIOs, 12-bit ADC conversion time of 0.4 µs, low-power Stop/Standby modes, and support for SWD debug interface.
Technical Context
The device implements an Arm Cortex-M0+ core with Memory Protection Unit (MPU), enabling secure partitioning of code and data spaces in resource-constrained embedded systems. Its clock system includes dual oscillators: 4–48 MHz HSE and 32 kHz LSE with calibration, plus factory-trimmed 48 MHz HSI48 (±1 %) and 32 kHz LSI (±5 %).
Peripherals are interconnected via AHB/APB buses with DMA controller supporting three channels and flexible request mapping. The ADC features hardware oversampling, temperature sensor, and VREFINT reference - all accessible in Stop mode for wake-up-triggered measurements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M0+, 48 MHz max - enables real-time deterministic control in motor drives and power converters. |
| Flash / RAM | 32 KB flash with readout protection; 12 KB SRAM with hardware parity - supports robust firmware updates and safety-critical data integrity. |
| ADC Resolution | 12-bit, 0.4 µs conversion time - delivers high-speed analog acquisition for battery monitoring and sensor fusion. |
| I/O Voltage Tolerance | 5 V-tolerant on all pins - simplifies level-shifting in mixed-voltage industrial interfaces. |
| Low-Power Modes | Sleep, Stop, Standby, Shutdown - Stop mode draws 0.32 µA (typ.) with RTC running, ideal for battery-powered endpoints. |
| Communication Interfaces | 2× USART (1 with LIN/ISO7816), 1× I²C Fast-mode Plus (1 Mbit/s), 1× SPI (24 Mbit/s) - meets industrial fieldbus and smart-card protocol requirements. |
| Timers | 1× advanced-control timer (TIM1), 4× general-purpose 16-bit timers, 2× watchdogs - supports PWM generation, encoder counting, and fail-safe timing. |
Pinout & Package
STM32C031C4U6 is housed in a 7 mm × 7 mm UFQFPN48 package (pitch: 0.5 mm), RoHS-compliant and ECOPACK2-certified. Pin layout supports full peripheral remapping across GPIO ports A–F, with dedicated SWDIO/SWCLK debug pins and NRST reset input.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply / ground | Dual VDD/VSS pairs ensure stable core and I/O domain operation across 2.0–3.6 V range. |
| PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD15, PF0–PF1 | General-purpose I/O | All 45 pins support external interrupt vectors and 5 V tolerance - enables direct connection to legacy 5 V logic without level shifters. |
| NRST | Active-low reset input | Asynchronous reset with internal pull-up; accepts 1.65–5.5 V logic levels - compatible with diverse reset supervisor ICs. |
| SWDIO / SWCLK | Serial Wire Debug interface | Two-pin debug port supporting programming, real-time tracing, and breakpoint debugging - eliminates need for JTAG header space. |
| BOOT0 | Boot mode selection | High at power-on selects system memory bootloader - enables field firmware recovery without external programmer. |
Key Features
| Feature | Design Value |
|---|---|
| Hardware CRC unit | Accelerates checksum calculation for firmware image verification and communication packet integrity (e.g., Modbus RTU). |
| Programmable BOR | Four selectable voltage thresholds (1.6–2.9 V) - prevents erratic operation during brownout conditions in unregulated power supplies. |
| Temperature sensor | Integrated calibrated sensor (±2 °C accuracy) - enables ambient temperature compensation in precision analog signal chains. |
| USART ISO7816 mode | Fully compliant with ISO/IEC 7816-3 standard - supports contact-based smart card reader designs without external UART-to-ISO bridge. |
| RTC with alarm | Calendar function with sub-second resolution and wake-up from Stop mode - powers time-triggered tasks in energy-harvesting sensors. |
Applications
| Industrial Sensor Node | Smart Energy Meter |
|---|---|
Use Scenario: Battery-powered environmental monitor collecting temperature, humidity, and CO₂ via I²C sensors and transmitting data over LoRaWAN. IC Role / Device Role: Central MCU managing sensor polling, ADC sampling, data encryption, and radio interface timing. Use Value: Ultra-low Stop-mode current (0.32 µA) extends 10-year battery life; 5 V-tolerant I²C pins simplify sensor integration. |
Use Scenario: DIN-rail mounted electricity meter measuring voltage/current harmonics and logging consumption data hourly. IC Role / Device Role: Real-time measurement engine interfacing with metrology ADCs and driving LCD display via SPI. Use Value: 12-bit ADC with hardware oversampling achieves >16-bit ENOB for Class 0.5 accuracy; RTC alarm triggers scheduled data uploads. |
| Motor Control Gateway | POS Terminal Peripheral |
Use Scenario: Brushless DC motor driver board receiving CAN commands and executing commutation sequences using Hall-effect feedback. IC Role / Device Role: Field-oriented control (FOC) executor with PWM generation, current sensing, and fault handling. Use Value: TIM1 advanced timer provides complementary PWM outputs with dead-time insertion; 48 MHz CPU sustains 20 kHz PWM carrier. |
Use Scenario: Payment terminal add-on module reading magnetic stripe cards and communicating with host via UART. IC Role / Device Role: Secure data acquisition and ISO7816-compliant smart card interface controller. Use Value: Dedicated USART in ISO7816 mode handles ATR negotiation and T=0 protocol without software overhead; hardware parity ensures data reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32G031F8P6 | Same Cortex-M0+, but 64 KB flash, no RTC calendar, only 1 USART with LIN (no ISO7816) | Lacks smart-card interface and sub-second RTC - unsuitable for payment terminals requiring ISO7816 or time-stamped logging | Select when higher flash capacity is needed and ISO7816/RTC calendar are not required. |
| RP2040 | Dual-core Arm Cortex-M0+, 2 MB flash, no hardware crypto, no analog peripherals (ADC requires external IC) | No integrated ADC, RTC, or analog references - increases BOM count and PCB area for sensor/metering use cases | Prefer for cost-sensitive consumer devices where analog integration is unnecessary and USB host capability is critical. |
Compared with STM32G031F8P6 and RP2040, the STM32C031C4U6 uniquely combines ISO7816 support, calendar RTC, and 12-bit ADC in a compact 48-pin package - making it optimal for secure, time-aware, analog-intensive edge nodes where peripheral integration reduces system complexity.
Availability
STM32C031C4U6 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart energy meters, motor control gateways, and POS terminal peripherals requiring stable component supply and long-term manufacturability.
Supply support for STM32C031C4U6 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, specializing in microcontrollers, power management, and automotive-grade ICs with strong focus on industrial and embedded markets.
The STM32C0 series targets cost-sensitive, high-volume industrial applications requiring robustness, low power, and rich analog/peripheral integration - bridging the gap between legacy 8-bit MCUs and higher-end Cortex-M3/M4 devices.
FAQ
What is the maximum operating temperature for STM32C031C4U6?
The STM32C031C4U6 is rated for operation from –40 °C to +125 °C ambient temperature, validated per DS13867 Rev 4 Section 5.3.1. This extended grade supports deployment in harsh environments such as industrial motor drives, outdoor smart meters, and under-hood automotive auxiliary modules.
Does STM32C031C4U6 support USB connectivity?
No, STM32C031C4U6 does not integrate a USB peripheral. It offers USART, SPI, I²C, and ISO7816 interfaces instead. For USB host/device functionality, ST recommends the STM32G0 series (e.g., STM32G071KB) or STM32F072RB, which include USB 2.0 FS controllers.
Can the internal 48 MHz RC oscillator be used for USB or audio timing?
No - the HSI48 oscillator has ±1 % accuracy at 25 °C, insufficient for USB full-speed (±0.25 %) or I²S audio clocking. It is qualified for system clocking and non-critical peripherals. For USB or precise audio, an external crystal (HSE) or dedicated clock generator must be used.
Is there hardware support for AES encryption on STM32C031C4U6?
No, STM32C031C4U6 lacks dedicated cryptographic accelerators. It supports software-based AES via CMSIS libraries, but no hardware AES, SHA, or PKA engines. For secure boot or OTA updates requiring acceleration, consider STM32L5 or STM32U5 series with CryptoCell-310.
STM32C031C4U6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 48-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:
- 45
- Program Memory Size:
- 16KB (16K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 12K x 8
- Voltage - Supply (Vcc/Vdd):
- 2V ~ 3.6V
- Data Converters:
- A/D 21x12b SAR
- Oscillator Type:
- External, Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32C031C4U6 FAQ
1.How can I place an order for STM32C031C4U6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32C031C4U6 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 STM32C031C4U6 reliable?
The price and inventory of STM32C031C4U6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32C031C4U6 is usually 5 days.
3.What payment methods are accepted for STM32C031C4U6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32C031C4U6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32C031C4U6?
STM32C031C4U6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32C031C4U6 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 STM32C031C4U6?
For technical support, including STM32C031C4U6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32C031C4U6 requirements.
6.How does Aetrix verify that STM32C031C4U6 is sourced from the original manufacturer or authorized distributors?
All STM32C031C4U6 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 STM32C031C4U6 meets industry standards.
7.What is the process for return or replacement of STM32C031C4U6?
All STM32C031C4U6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32C031C4U6, 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 STM32C031C4U6 part is unused and in its original packaging.
Return procedure for STM32C031C4U6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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