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STMicroelectronics STM32F051C8U6TR
- Part No.:
- STM32F051C8U6TR
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 48-UFQFN Exposed Pad
- Datasheet:
-
STM32F051C8U6TR.pdf
- Description:
- IC MCU 32BIT 64KB FLASH 48UFQFPN
- Quantity:
- Payment:
- Shipping:
Inventory:1,205
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Product details
Overview
STM32F051C8U6TR from STMicroelectronics is a 32-bit ARM Cortex-M0 microcontroller with 64 KB Flash, 8 KB SRAM, 48 MHz max CPU frequency, integrated 12-bit ADC and DAC, and dual USART/I²C/SPI interfaces. It operates from 2.0–3.6 V and supports capacitive touch sensing, RTC with alarm, and low-power Stop/Standby modes - deployed in industrial sensor nodes and smart metering front-ends.
For engineers reviewing the STM32F051C8U6TR datasheet, STM32F051C8U6TR pinout, STM32F051C8U6TR application, or STM32F051C8U6TR equivalent, key selection criteria include its 48-pin UFQFPN package, 5 V-tolerant I/O count (up to 36), 1.0 µs ADC conversion time, 16-channel analog input capability, and SWD debug interface compatibility.
Technical Context
The device implements an ARM Cortex-M0 core with Harvard architecture, supporting Thumb-2 instruction set and NVIC for deterministic interrupt handling. Its memory subsystem includes 64 KB of single-cycle Flash with ECC protection and 8 KB SRAM with hardware parity checking - enabling robust real-time execution in safety-aware embedded control.
Clock management integrates multiple sources: 4–32 MHz external crystal, 32 kHz LSE for RTC, 8 MHz HSI with PLL (×6 → 48 MHz), and 40 kHz LSI for watchdog timing. Power management features POR/PDR, programmable voltage detector (PVD), and three low-power modes (Sleep, Stop, Standby) with RTC and backup register retention via VBAT.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M0, 48 MHz max - enables deterministic real-time control with <100 ns interrupt latency. |
| Flash Memory | 64 KB - sufficient for complex firmware with bootloader, OTA update partition, and application logic. |
| SRAM | 8 KB with HW parity - detects single-bit errors in RAM-critical data buffers and stack operations. |
| ADC | 12-bit, 1.0 µs conversion, 16-channel input - supports fast sampling of multi-sensor analog inputs (e.g., temperature, current, voltage). |
| DAC | 12-bit, single channel - provides precise analog output for calibration signals or actuator biasing. |
| I/O Pins | 39 GPIOs, up to 36 with 5 V tolerance - simplifies interfacing with legacy 5 V peripherals without level shifters. |
| Timers | 11 timers including TIM1 (advanced-control, 6-channel PWM + deadtime), TIM2/TIM3 (general-purpose), and SysTick - supports motor control, IR decoding, and precise timing intervals. |
Pinout & Package
STM32F051C8U6TR uses a 48-pin Ultra-Fine Pitch Quad Flat No-lead (UFQFPN) package, 7 mm × 7 mm, 0.5 mm pitch, with exposed thermal pad. Pinout conforms to ST's standard STM32F051x8 pin mapping for UFQFPN48.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VSS, VSSA | Power supply and ground | Separate digital/analog domains ensure clean ADC/DAC reference and reduce noise coupling. |
| PA0–PA15, PB0–PB15, PC13–PC15 | General-purpose I/O | All support external interrupts; PA0–PA7, PB0–PB1, PC13–PC15 are 5 V tolerant - enable direct connection to 5 V sensors or logic. |
| PA9/PA10, PA11/PA12 | USART1 TX/RX, USB D+/D− | USART1 supports LIN, IrDA, auto-baud detection; USB pins are not implemented on this variant (no USB PHY). |
| PA4–PA7, PB0–PB1 | ADC1_IN0–IN11 | 12 dedicated analog inputs mapped across ports A/B - allow simultaneous sampling of multiple analog channels. |
| PA4 | DAC_OUT1 | Single 12-bit buffered DAC output - drives external op-amp or filter without external DAC IC. |
| PA13/PA14 | SWDIO/SWCLK | 2-pin Serial Wire Debug interface - enables full debug, flash programming, and real-time trace with minimal PCB footprint. |
Key Features
| Feature | Design Value |
|---|---|
| Capacitive Sensing Controller (TSC) | Up to 18 channels supporting touchkey, linear, and rotary sensors - eliminates need for external touch controller IC in HMI designs. |
| Advanced-Control Timer (TIM1) | 6-channel complementary PWM with programmable deadtime and emergency stop - enables safe 3-phase motor gate driving. |
| RTC with Calendar & Alarm | Hardware calendar, alarm, and periodic wakeup from Stop/Standby - supports battery-backed timekeeping and scheduled low-power wakeups. |
| I²C Fast Mode Plus | 1 Mbit/s with 20 mA sink capability - drives longer bus traces or multiple slaves without external pull-up boosters. |
| HDMI CEC Interface | Dedicated CEC peripheral with header-detection wakeup - enables remote control interoperability in consumer electronics gateways. |
Applications
| Industrial Sensor Node | Smart Energy Meter |
|---|---|
Use Scenario: Compact environmental monitoring unit measuring temperature, humidity, and CO₂ using analog and digital sensors. IC Role / Device Role / Timing Role: Central MCU managing sensor acquisition, local processing, and RS-485/LoRaWAN communication. Use Value: Integrated 12-bit ADC, 5 V-tolerant I/O, and low-power Stop mode extend battery life >5 years while maintaining measurement accuracy. | Use Scenario: Residential electricity meter with tamper detection, pulse counting, and display backlight control. IC Role / Device Role / Timing Role: Main controller executing metrology algorithms, driving LCD segments, and managing secure communication with utility backend. Use Value: Hardware RTC with VBAT backup ensures accurate billing timestamps during mains outage; DAC calibrates shunt-based current measurement. |
| Motor Control Gateway | Home Appliance HMI |
Use Scenario: Brushless DC motor driver board for HVAC blower or washing machine drum control. IC Role / Device Role / Timing Role: Real-time PWM generator and current-sense signal conditioner interfacing with external gate drivers. Use Value: TIM1's deadtime insertion and emergency stop prevent shoot-through faults; 16-bit resolution enables fine-grained speed regulation. | Use Scenario: Touch-enabled control panel for microwave oven or induction cooktop with slider and button zones. IC Role / Device Role / Timing Role: Capacitive touch controller and UI state manager with LED dimming and buzzer feedback. Use Value: On-chip TSC supports up to 18 electrodes - reduces BOM cost by eliminating dedicated touch IC and associated firmware stack. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32F030F4P6 | 32 KB Flash, 4 KB SRAM, no DAC, no capacitive sensing, 20-pin TSSOP | Limited peripheral set; suitable only for basic control tasks without analog output or touch | Select when cost sensitivity outweighs feature requirements and PCB space allows TSSOP mounting. |
| STM32G031F8P6 | 64 KB Flash, 8 KB SRAM, same pinout (20-pin), but higher 64 MHz CPU, no TSC, enhanced security features | Targets secure boot and firmware integrity use cases; lacks touch sensing capability | Prefer for new designs requiring secure firmware updates and cryptographic acceleration over capacitive HMI. |
Compared with STM32F051C8U6TR, STM32F030F4P6 sacrifices DAC, ADC channels, and touch capability for lower cost and smaller footprint, while STM32G031F8P6 trades TSC for security extensions and higher clock performance - making the F051 optimal for analog-rich, touch-enabled edge nodes where legacy toolchain compatibility matters.
Availability
STM32F051C8U6TR is available at Aetrix Electronics and suitable for industrial sensor nodes, smart energy meters, motor control gateways, and home appliance HMIs requiring stable component supply across long-lifecycle production programs.
Supply support for STM32F051C8U6TR 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 devices, sensors, and analog ICs for industrial, automotive, and consumer markets.
The STM32F0 series targets cost-sensitive, resource-constrained embedded applications requiring high integration, low power, and robust real-time performance - optimized for industrial control, appliance automation, and IoT edge nodes.
FAQ
What is the maximum operating temperature range for STM32F051C8U6TR?
The STM32F051C8U6TR is rated for industrial temperature range: –40 °C to +85 °C. This is confirmed in Section 6.3.1 of the datasheet (DocID022265 Rev 7), under "General operating conditions", and applies to all package variants including UFQFPN48. Thermal derating is not required within this range.
Does STM32F051C8U6TR support USB device functionality?
No. Although the UFQFPN48 pinout includes pads labeled PA11 (USB DM) and PA12 (USB DP), the STM32F051C8U6TR does not integrate a USB PHY or USB controller. These pins are unconnected internally and cannot be used for USB communication - verified in Table 12 ("Legend/abbreviations") and Section 3.18 of the datasheet.
Can the internal 12-bit DAC drive a 1 kΩ load directly?
Yes, but with voltage droop. The DAC output buffer supports up to 5 mA source/sink current (Section 6.3.17). Driving a 1 kΩ load at 3.3 V requires 3.3 mA - within spec. However, output impedance rises above 100 kHz; for precision or AC-coupled applications, an external op-amp buffer is recommended per datasheet Figure 122.
How many I²C interfaces are available and what are their speed limits?
Two I²C interfaces are available: I²C1 and I²C2. I²C1 supports Fast Mode Plus (1 Mbit/s) with 20 mA current sink capability; I²C2 supports standard Fast Mode (400 kbit/s). Both support SMBus/PMBus and wakeup from Stop mode - detailed in Sections 3.16 and Table 9 of the datasheet.
STM32F051C8U6TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 48-UFQFN Exposed Pad
- Series:
- STM32F0
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M0
- Core Size:
- 32-Bit Single-Core
- Speed:
- 48MHz
- Connectivity:
- HDMI-CEC, I2C, IrDA, LINbus, SPI, UART/USART
- Peripherals:
- DMA, I2S, POR, PWM, WDT
- Number of I/O:
- 39
- Program Memory Size:
- 64KB (64K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 8K x 8
- Voltage - Supply (Vcc/Vdd):
- 2V ~ 3.6V
- Data Converters:
- A/D 13x12b; D/A 1x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32F051C8U6TR FAQ
1.How can I place an order for STM32F051C8U6TR through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32F051C8U6TR 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 STM32F051C8U6TR reliable?
The price and inventory of STM32F051C8U6TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32F051C8U6TR is usually 5 days.
3.What payment methods are accepted for STM32F051C8U6TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32F051C8U6TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32F051C8U6TR?
STM32F051C8U6TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32F051C8U6TR 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 STM32F051C8U6TR?
For technical support, including STM32F051C8U6TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32F051C8U6TR requirements.
6.How does Aetrix verify that STM32F051C8U6TR is sourced from the original manufacturer or authorized distributors?
All STM32F051C8U6TR 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 STM32F051C8U6TR meets industry standards.
7.What is the process for return or replacement of STM32F051C8U6TR?
All STM32F051C8U6TR units undergo pre-shipment inspection (PSI). If there is an issue with STM32F051C8U6TR, 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 STM32F051C8U6TR part is unused and in its original packaging.
Return procedure for STM32F051C8U6TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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