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STMicroelectronics STM32C031K4U7TR
- Part No.:
- STM32C031K4U7TR
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 32-UFQFN Exposed Pad
- Datasheet:
-
STM32C031K4U7TR.pdf
- Description:
- IC MCU 32BIT 16KB FLASH 32UFQFPN
- Quantity:
- Payment:
- Shipping:
Inventory:3,462
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Product details
Overview
STM32C031K4U7TR 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, and integrated peripherals including two USARTs, one I²C, one SPI, 12-bit ADC (19-channel), eight timers, and RTC. It targets cost-sensitive industrial control and smart sensor nodes requiring robust low-power operation across -40°C to 125°C.
For engineers reviewing the STM32C031K4U7TR datasheet, STM32C031K4U7TR pinout, STM32C031K4U7TR application, or STM32C031K4U7TR equivalent, key selection criteria include its 5 V-tolerant GPIOs, ±1 % internal 48 MHz RC oscillator, programmable brownout reset, SWD debug interface, and support for Stop/Standby/Shutdown low-power modes with sub-μA retention current.
Technical Context
The STM32C031K4U7TR implements an Arm Cortex-M0+ core with MPU, executing instructions at up to 48 MHz from flash or SRAM. Its memory subsystem includes 32 KB of flash with readout protection and 12 KB of SRAM with hardware parity checking-enabling reliable code execution and data integrity in safety-aware applications.
Clock architecture integrates four independent sources: 4–48 MHz HSE crystal oscillator, 32 kHz LSE with calibration, 48 MHz HSI48 (±1 %), and 32 kHz LSI (±5 %), enabling flexible timing configurations for real-time control, communication synchronization, and low-power wake-up events without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M0+, 48 MHz max - enables deterministic real-time response for motor control and protocol stacks. |
| Flash / SRAM | 32 KB flash with protection / 12 KB SRAM with hardware parity - supports secure firmware updates and fault-tolerant data buffering. |
| ADC | 12-bit, 0.4 µs conversion time, up to 19 external channels - delivers high-resolution analog sensing for temperature, voltage, and current monitoring. |
| Timers | Eight timers: one advanced-control (TIM1), four general-purpose (TIM3/14/16/17), two watchdogs (IWDG/WWDG), SysTick - provides PWM generation, input capture, and system-level reliability. |
| Communication | Two USARTs (one with ISO7816/LIN/IrDA), one I²C (Fast-mode Plus, 1 Mbit/s), one SPI (24 Mbit/s) - supports multi-protocol connectivity in constrained embedded systems. |
| Power Range | 2.0 V to 3.6 V supply - compatible with single-cell Li-ion, 3.3 V rails, and energy-harvesting power sources. |
| Operating Temp | -40°C to +125°C - qualified for under-hood automotive sensors, industrial PLC I/O modules, and outdoor metering. |
Pinout & Package
STM32C031K4U7TR is housed in a 32-pin UFQFPN (5 × 5 mm, 0.5 mm pitch) package with exposed thermal pad. This compact, lead-free, ECOPACK2-compliant package supports high-density PCB layouts and efficient thermal dissipation in space-constrained applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply / Ground | Dual VDD pins (VDDA/VDD) enable analog/digital domain separation; VSS pins provide low-impedance return paths for noise-sensitive circuits. |
| PA0–PA15, PB0–PB15, PF0–PF1 | General-purpose I/O | All 30 GPIOs are 5 V-tolerant and mappable to external interrupt vectors - simplifies level-shifting and enhances interoperability with legacy 5 V logic. |
| NRST | Reset input | Active-low, Schmitt-triggered reset pin with programmable BOR threshold - ensures reliable startup and brownout recovery without external supervisor IC. |
| SYSCLK, SWDIO, SWCLK | Debug & clock interface | Serial Wire Debug (SWD) pins enable non-intrusive programming and real-time tracing; SYSCLK output allows clock verification on test equipment. |
| PA9/PA10 (USART1) | Asynchronous serial interface | Default USART1 TX/RX pins supporting auto baud rate detection and wake-up from Stop mode - ideal for battery-powered remote telemetry. |
Key Features
| Feature | Design Value |
|---|---|
| Low-power modes | Stop mode current ≤ 0.35 µA (typ.), Standby ≤ 0.25 µA (typ.) - extends battery life in wireless sensor nodes beyond 10 years. |
| CRC calculation unit | Hardware-accelerated CRC-32 generator - offloads checksum computation from CPU during firmware OTA updates or data logging. |
| Internal oscillators | HSI48 (±1 %) and LSI (±5 %) eliminate need for external crystals in cost-sensitive designs while maintaining UART timing accuracy. |
| Memory protection | MPU enforces privilege levels and region-based access control - prevents accidental or malicious corruption of critical code/data sections. |
| Temperature sensor | Integrated calibrated sensor with ±2°C accuracy (0–125°C) - enables self-monitoring for thermal derating or ambient condition awareness. |
Applications
| Industrial Motor Control | Smart Energy Metering |
|---|---|
Use Scenario: Brushless DC motor commutation in HVAC blowers and pump drives using hall-effect feedback. IC Role / Device Role / Timing Role: Real-time PWM generation via TIM1, ADC sampling of phase currents, and LIN bus communication for diagnostics. Use Value: 48 MHz CPU and dedicated motor timer enable precise 20 kHz PWM switching with <100 ns jitter, reducing audible noise and EMI. |
Use Scenario: Residential electricity meter with anti-tampering features and pulse output for utility billing. IC Role / Device Role / Timing Role: Isolated current/voltage measurement via ADC, RTC-based tariff scheduling, and optical IR LED driver for HART/IEC 62056-21. Use Value: Hardware parity on SRAM and ROP on flash ensure data integrity during power glitches; 125°C rating supports sealed meter enclosures. |
| IoT Edge Sensor Node | Automotive Body Control Module |
Use Scenario: Battery-powered environmental monitor (temp/humidity/CO₂) transmitting via LoRaWAN gateway. IC Role / Device Role / Timing Role: Wake-up from Shutdown mode via EXTI on sensor interrupt, ADC acquisition, and USART-driven packet framing. Use Value: Sub-µA shutdown current and fast wake-up (<5 µs) extend CR2032 battery life to >5 years while maintaining responsiveness. |
Use Scenario: Door module controlling window lift, mirror fold, and interior lighting with LIN slave interface. IC Role / Device Role / Timing Role: LIN physical layer via USART1, GPIO-driven H-bridge control, and watchdog supervision of MCU health. Use Value: 5 V-tolerant I/Os interface directly with 12 V vehicle bus signals; BOR and WWDG meet ISO 26262 ASIL-B functional safety requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32C011F4U6TR | 24 KB flash, 8 KB SRAM, no RTC, TSSOP20 (20-pin) package | Lacks calendar RTC and has fewer GPIOs - suitable only for ultra-low-pin-count, non-time-critical sensing. | Select when board space and BOM cost are primary constraints and real-time timestamping is unnecessary. |
| STM32G031F8P6 | 64 KB flash, 12 KB SRAM, USB 2.0 FS, higher peripheral count, LQFP32 | Includes USB and more timers but lacks 125°C rating and has larger footprint - better for host-connected devices. | Choose when USB device functionality or future firmware scalability outweighs extended temperature and compactness needs. |
Compared with STM32C011F4U6TR, the STM32C031K4U7TR adds RTC, higher memory, and extended temperature range; versus STM32G031F8P6, it trades USB for smaller size, lower cost, and guaranteed 125°C operation - making it optimal for thermally demanding, space-constrained industrial nodes.
Availability
STM32C031K4U7TR is available at Aetrix Electronics and suitable for industrial motor control, smart energy metering, IoT edge sensor nodes, and automotive body electronics requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for STM32C031K4U7TR 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 automotive-grade components since 1987.
The STM32C0 series targets cost-optimized, high-reliability applications in industrial automation and consumer appliances, emphasizing low-power efficiency, extended temperature operation, and simplified design-in with minimal external components.
FAQ
What is the maximum operating temperature for STM32C031K4U7TR?
The STM32C031K4U7TR is rated for operation from -40°C to +125°C ambient temperature, validated per DS13867 Rev 4 Section 5.3.1. This extended range supports deployment in engine compartments, industrial enclosures, and outdoor metering housings without thermal derating.
Does STM32C031K4U7TR support USB connectivity?
No, the STM32C031K4U7TR does not integrate a USB peripheral. It provides USART, I²C, and SPI interfaces only. For USB device capability, ST recommends the STM32G031 or STM32F07x families, which include USB 2.0 Full-Speed controllers.
Can the internal 48 MHz RC oscillator be used for USART communication?
Yes, the HSI48 oscillator (±1 % accuracy) meets the ±2 % tolerance required for 115.2 kbps UART communication without external crystal, as confirmed in DS13867 Rev 4 Table 64 and Section 3.18. Auto baud rate detection further improves robustness in variable-load environments.
What debug interface does STM32C031K4U7TR use?
The device uses Serial Wire Debug (SWD) with two dedicated pins: SWDIO and SWCLK. It does not support JTAG. SWD enables full programming, debugging, and real-time tracing via standard ST-LINK/V2-1 or compatible debug probes, as specified in Section 3.20.1 of the datasheet.
STM32C031K4U7TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 32-UFQFN Exposed Pad
- Series:
- STM32C0
- Packaging:
- Tape & Reel (TR)
- 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, POR, PWM, Temp Sensor, WDT
- Number of I/O:
- 30
- 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 18x12b SAR
- Oscillator Type:
- External, Internal
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32C031K4U7TR FAQ
1.How can I place an order for STM32C031K4U7TR through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32C031K4U7TR 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 STM32C031K4U7TR reliable?
The price and inventory of STM32C031K4U7TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32C031K4U7TR is usually 5 days.
3.What payment methods are accepted for STM32C031K4U7TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32C031K4U7TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32C031K4U7TR?
STM32C031K4U7TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32C031K4U7TR 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 STM32C031K4U7TR?
For technical support, including STM32C031K4U7TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32C031K4U7TR requirements.
6.How does Aetrix verify that STM32C031K4U7TR is sourced from the original manufacturer or authorized distributors?
All STM32C031K4U7TR 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 STM32C031K4U7TR meets industry standards.
7.What is the process for return or replacement of STM32C031K4U7TR?
All STM32C031K4U7TR units undergo pre-shipment inspection (PSI). If there is an issue with STM32C031K4U7TR, 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 STM32C031K4U7TR part is unused and in its original packaging.
Return procedure for STM32C031K4U7TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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