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STMicroelectronics STM32C031C6U6
- Part No.:
- STM32C031C6U6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 48-UFQFN Exposed Pad
- Datasheet:
-
STM32C031C6U6.pdf
- Description:
- IC MCU 32BIT 32KB FLASH 48UFQFPN
- Quantity:
- Payment:
- Shipping:
Inventory:2,325
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Product details
Overview
STM32C031C6U6 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), 12-bit ADC (19 channels), eight timers including advanced motor control timer TIM1, and I²C Fast-mode Plus (1 Mbit/s). It targets cost-sensitive industrial control and smart sensor nodes requiring robust low-power operation down to Shutdown mode.
For engineers reviewing the STM32C031C6U6 datasheet, STM32C031C6U6 pinout, STM32C031C6U6 application, or STM32C031C6U6 equivalent, key selection criteria include its 48 MHz Cortex-M0+ core with MPU, 5 V-tolerant GPIOs, integrated CRC unit, hardware parity on SRAM, and support for multiple low-power modes (Stop/Standby/Shutdown) with sub-µA retention current.
Technical Context
The STM32C031C6U6 implements an Arm Cortex-M0+ core with Memory Protection Unit (MPU) for deterministic real-time execution and memory isolation. Its clock system combines four oscillators: 4–48 MHz HSE, 32 kHz LSE with calibration, 48 MHz HSI48 (±1 %), and 32 kHz LSI (±5 %), enabling precise timing across operating modes.
Peripheral interconnect uses a multi-layer AHB/APB bus matrix supporting concurrent DMA transfers and flexible peripheral routing. The 12-bit ADC achieves 0.4 µs conversion time over 0–3.6 V range and includes internal temperature sensor and VREFINT for self-calibration-critical for embedded sensing applications without external references.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Arm Cortex-M0+, 48 MHz max - enables real-time deterministic control with low interrupt latency. |
| Flash / SRAM | 32 KB flash with readout protection; 12 KB SRAM with hardware parity - ensures code integrity and runtime data reliability. |
| ADC | 12-bit, 0.4 µs conversion, 19 external channels - supports high-speed analog monitoring in motor control or sensor fusion. |
| Timers | Eight timers: one 16-bit advanced-control (TIM1), four general-purpose (TIM3/14/16/17), two watchdogs - provides PWM generation, capture/compare, and fail-safe supervision. |
| I/O Voltage | 5 V-tolerant on all fast I/Os - simplifies interface with legacy 5 V peripherals without level shifters. |
| Low-Power Modes | Stop (0.35 µA), Standby (0.25 µA), Shutdown (0.15 µA) - extends battery life in always-on edge devices. |
| Communication | Two USARTs (one ISO7816/LIN/IrDA), one I²C Fast-mode Plus (1 Mbit/s), one SPI (24 Mbit/s) - meets industrial serial protocol requirements. |
Pinout & Package
STM32C031C6U6 is housed in a 7 mm × 7 mm UFQFPN48 package (pitch 0.5 mm), compliant with ECOPACK2 environmental standards and suitable for compact PCB layouts with high I/O density.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Primary 2.0–3.6 V domain; decoupling required per datasheet layout guidelines for noise immunity. |
| PA0–PA15, PB0–PB15, PC13–PC15, PD2 | General-purpose I/O | All 45 pins are 5 V-tolerant and mappable to external interrupts - enables direct connection to industrial sensors/actuators. |
| PA9/PA10, PA11/PA12 | USART1_TX/USART1_RX, USB_DM/USB_DP | USART1 supports LIN auto-baud detection; USB pins are not functional on C031 - reserved for pin compatibility with higher-series MCUs. |
| PA1, PA4–PA7, PB0–PB1, PC0–PC5 | ADC input channels | Supports simultaneous sampling of up to 19 external analog signals - critical for multi-sensor condition monitoring. |
| PA8, PA15, PB3–PB4, PB10–PB11, PB13–PB15 | Alternate function (SPI/I²C/USART) | Configurable via AFIO registers; e.g., PB10/PB11 = I²C1_SCL/I²C1_SDA with Fast-mode Plus current sink. |
Key Features
| Feature | Design Value |
|---|---|
| Hardware CRC unit | Accelerates firmware integrity checks and communication frame validation without CPU overhead. |
| Programmable BOR | Four voltage thresholds (2.0/2.2/2.4/2.7 V) enable adaptive brownout response for varying supply conditions. |
| Calendar RTC with alarm | Provides accurate timekeeping and wake-up events during Stop mode - essential for scheduled sensor polling. |
| DMA controller (3-channel) | Enables zero-CPU-load data movement between peripherals and memory - improves real-time responsiveness in UART/ADC streaming. |
| Temperature sensor + VREFINT | On-die sensor calibrated at factory (±1.5°C accuracy); VREFINT enables ratiometric ADC measurements independent of supply drift. |
Applications
| Industrial Motor Control | Smart Sensor Node |
|---|---|
Use Scenario: Brushless DC motor commutation in HVAC blowers or small pumps using hall-effect feedback. IC Role / Device Role / Timing Role: MCU executes FOC algorithm, generates 3-phase PWM via TIM1, reads ADC current feedback, and communicates status via USART1 LIN. Use Value: Integrated advanced timer and 12-bit ADC reduce external component count; 48 MHz core delivers <1 µs loop latency for stable torque control. | Use Scenario: Battery-powered environmental monitor measuring temperature, humidity, and CO₂ via analog/digital sensors. IC Role / Device Role / Timing Role: Host controller acquires sensor data, performs local preprocessing, stores logs in flash, and transmits via USART2 to gateway. Use Value: Shutdown mode draws only 0.15 µA; RTC alarm wakes MCU every 10 minutes for measurement - enabling >5-year coin-cell operation. |
| PLC I/O Module | Energy Metering Interface |
Use Scenario: DIN-rail mounted digital input module detecting 24 V DC field signals in factory automation. IC Role / Device Role / Timing Role: GPIOs with programmable pull-ups detect dry-contact closures; USART2 reports status to main PLC over RS-485 (via external transceiver). Use Value: 5 V-tolerant I/Os accept 24 V inputs with simple resistive dividers; hardware parity on SRAM prevents corrupted state during EMI exposure. | Use Scenario: Pulse-counting interface between utility meter and smart home gateway, converting mechanical meter pulses to UART packets. IC Role / Device Role / Timing Role: External interrupt on PA0 captures meter pulses; TIM3 measures pulse width and interval; USART1 transmits kWh data via IrDA. Use Value: Sub-microsecond interrupt latency ensures no pulse loss at >10 kHz rates; IrDA physical layer eliminates wiring complexity in retrofit installations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32C011F4T6 | 16 KB flash, 6 KB SRAM, TSSOP20 (20-pin), no RTC calendar, no USB pins | Suitable for ultra-low-pin-count digital control only - lacks ADC channels and timer features needed for analog-intensive designs | Select when board space and BOM cost are primary constraints and analog/peripheral count is minimal. |
| STM32G031K8T6 | 64 KB flash, 8 KB SRAM, LQFP32, higher clock (64 MHz), no VREFINT, different ADC linearity spec | Better for firmware-over-the-air updates and larger control algorithms - but requires redesign for pinout and power sequencing | Choose when future scalability and enhanced crypto acceleration (AES) are required, accepting higher cost and layout change. |
Compared with STM32C011F4T6, the STM32C031C6U6 offers double flash/SRAM and full peripheral set in 48-pin format; versus STM32G031K8T6, it trades raw performance for lower static power and tighter analog integration - making it optimal for battery-constrained sensor edge nodes.
Availability
STM32C031C6U6 is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, PLC I/O modules, and energy metering interfaces requiring stable component supply and long-term manufacturability.
Supply support for STM32C031C6U6 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 automotive-grade components since 1987.
The STM32C0 series targets cost-optimized, high-reliability embedded applications - delivering Cortex-M0+ performance with industrial temperature range (-40°C to 125°C), robust EMC behavior, and simplified qualification paths for industrial equipment.
FAQ
Does STM32C031C6U6 support USB device functionality?
No. Although the UFQFPN48 pinout reserves PA11/PA12 for USB_DM/USB_DP, the STM32C031C6U6 silicon does not implement USB PHY or USB controller logic. These pins are unconnected internally and must be left floating or tied to VDD/VSS per datasheet recommendations.
What is the maximum allowed ADC input voltage?
The absolute maximum ADC input voltage is VDDA + 0.3 V, with recommended operational range of 0 to VDDA (up to 3.6 V). Exceeding VDDA risks damage or inaccurate conversions; external clamping or scaling is required for signals above VDDA.
Can the internal 48 MHz RC oscillator (HSI48) be used as system clock source?
Yes. The HSI48 oscillator (±1 % accuracy) is fully qualified as system clock source and supports all low-power modes except Shutdown. It eliminates need for external crystal in cost-sensitive designs where ±1 % timing tolerance is acceptable for UART baud rate or PWM frequency.
Is the STM32C031C6U6 qualified for automotive applications?
No. The STM32C031C6U6 is specified for industrial temperature range (-40°C to 125°C) and carries industrial-grade qualification (AEC-Q100 not applicable). For automotive use, ST recommends the pin-compatible STM32G071 or STM32A0xx series with full AEC-Q100 Grade 1/2 certification.
STM32C031C6U6 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:
- 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 21x12b SAR
- Oscillator Type:
- External, Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32C031C6U6 FAQ
1.How can I place an order for STM32C031C6U6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32C031C6U6 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 STM32C031C6U6 reliable?
The price and inventory of STM32C031C6U6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32C031C6U6 is usually 5 days.
3.What payment methods are accepted for STM32C031C6U6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32C031C6U6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32C031C6U6?
STM32C031C6U6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32C031C6U6 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 STM32C031C6U6?
For technical support, including STM32C031C6U6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32C031C6U6 requirements.
6.How does Aetrix verify that STM32C031C6U6 is sourced from the original manufacturer or authorized distributors?
All STM32C031C6U6 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 STM32C031C6U6 meets industry standards.
7.What is the process for return or replacement of STM32C031C6U6?
All STM32C031C6U6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32C031C6U6, 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 STM32C031C6U6 part is unused and in its original packaging.
Return procedure for STM32C031C6U6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STM32C031C6U6 Tags
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