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STMicroelectronics STM32F051K8U6
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- Part No.:
- STM32F051K8U6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 32-UFQFN Exposed Pad
- Datasheet:
-
STM32F051K8U6.pdf
- Description:
- IC MCU 32BIT 64KB FLASH 32UFQFPN
- Quantity:
- Payment:
- Shipping:
Inventory:1,368
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Product details
Overview
STM32F051K8U6 from STMicroelectronics is a 32-bit ARM Cortex-M0 microcontroller in UFQFPN32 (5 × 5 mm) package, featuring 64 KB Flash, 8 KB SRAM with hardware parity, 48 MHz max CPU frequency, one 12-bit ADC (1.0 µs conversion), one 12-bit DAC, and dual USARTs with LIN/IrDA support. It targets cost-sensitive industrial control and smart sensor nodes requiring integrated analog peripherals and low-power operation.
For engineers reviewing the STM32F051K8U6 datasheet, STM32F051K8U6 pinout, STM32F051K8U6 application, or STM32F051K8U6 equivalent, key selection criteria include its 32-pin UFQFPN footprint, 5 V-tolerant I/O count (up to 27), RTC with calendar and alarm, capacitive touch sensing (18 channels), and dual fast I²C interfaces - one supporting Fast Mode Plus (1 Mbit/s) with 20 mA sink capability.
Technical Context
The STM32F051K8U6 integrates an ARM Cortex-M0 core with a 48 MHz system clock derived from internal 8 MHz RC + PLL or external 4–32 MHz crystal. Its memory subsystem includes 64 KB Flash with error correction and 8 KB SRAM with hardware parity checking for safety-critical firmware execution.
Peripheral architecture centers on real-time mixed-signal control: a 12-bit ADC with 16-channel multiplexing and 0–3.6 V input range; a single 12-bit DAC channel; two programmable analog comparators; and up to 11 timers - including TIM1 (16-bit advanced-control with deadtime and emergency stop) and TIM6 (dedicated DAC trigger timer).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M0, 48 MHz max - enables deterministic real-time control with Thumb-2 instruction set and <100 ns interrupt latency. |
| Flash Memory | 64 KB - sufficient for complex motor control or sensor fusion firmware with bootloader and field-upgrade space. |
| SRAM | 8 KB with HW parity - supports robust data logging and stack integrity verification in industrial environments. |
| ADC | 12-bit, 1.0 µs conversion, 16-channel - delivers 1 MSPS sampling for multi-sensor acquisition without external oversampling. |
| DAC | 12-bit, single channel - provides precise analog output for calibration signals or actuator biasing. |
| I/O Pins | 27 GPIOs, 5 V tolerant - simplifies interface to legacy 5 V logic and sensors without level shifters. |
| Timers | 11 timers including TIM1 (6-channel PWM + deadtime) and TIM6 (DAC sync) - supports BLDC motor commutation and synchronized analog waveform generation. |
Pinout & Package
STM32F051K8U6 uses the UFQFPN32 (5 × 5 mm, 0.5 mm pitch) package, optimized for compact industrial and consumer PCB layouts with exposed thermal pad for enhanced power dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Digital power supply and ground | 2.0–3.6 V operation; separate VDDA required for analog accuracy. |
| VDDA, VSSA | Analog power supply and ground | Must be filtered and decoupled independently to ensure ADC/DAC linearity and noise immunity. |
| PA0–PA15, PB0–PB11 | General-purpose I/O | 27 total usable pins; up to 27 support 5 V tolerance and external interrupt mapping. |
| NRST | Active-low reset input | Internal pull-up; accepts 1.65–5.5 V logic - compatible with external reset supervisors. |
| BOOT0 | Boot mode selection | High at power-on selects system memory boot (for DFU); tied low for Flash execution. |
| SWDIO / SWCLK | Serial Wire Debug interface | Two-pin debug port enabling full JTAG/SWD functionality without dedicated trace pins. |
Key Features
| Feature | Design Value |
|---|---|
| Capacitive Touch Sensing (TSC) | 18-channel controller supporting touchkey, linear, and rotary sensors - eliminates need for external touch IC in HMI applications. |
| Low-Power Modes | Sleep, Stop, Standby with RTC wake-up - achieves <1 µA standby current with VBAT-powered RTC active. |
| I²C Fast Mode Plus | 1 Mbit/s with 20 mA sink - drives long bus lines and multiple slaves without external pull-up boosters. |
| HDMI CEC Interface | Dedicated CEC peripheral with header detection wake-up - enables remote control interoperability in audio/video systems. |
| 96-bit Unique ID | Factory-programmed serial number - supports secure device authentication and license binding in firmware. |
Applications
| Industrial Sensor Node | Smart Thermostat |
|---|---|
Use Scenario: Compact environmental monitoring unit with temperature/humidity/pressure sensors, local display, and RS-485 communication. IC Role / Device Role / Timing Role: Main system controller managing sensor acquisition via ADC, driving display via GPIO/SPI, and handling protocol stack on USART with LIN support. Use Value: Integrated 12-bit DAC enables precise reference voltage generation for sensor signal conditioning; RTC with calendar supports scheduled data logging. | Use Scenario: Battery-powered HVAC controller with capacitive touch buttons, ambient temperature sensing, and wireless gateway interface. IC Role / Device Role / Timing Role: Primary MCU executing PID loop, interpreting TSC inputs, and managing low-power sleep/wake cycles using RTC alarm. Use Value: 18-channel TSC supports multi-button UI without external components; 5 V-tolerant I/O allows direct connection to legacy HVAC actuators. |
| BLDC Motor Starter | POS Terminal Peripheral |
Use Scenario: Low-cost fan or pump driver with Hall-effect feedback, overcurrent protection, and speed control via PWM. IC Role / Device Role / Timing Role: Real-time motor controller using TIM1 for 6-channel complementary PWM with deadtime insertion and emergency stop. Use Value: Hardware deadtime prevents shoot-through in half-bridge drivers; ADC samples current sense resistors at 1 MSPS for cycle-by-cycle protection. | Use Scenario: Barcode scanner or magnetic stripe reader module interfacing with main POS host via UART and USB CDC emulation. IC Role / Device Role / Timing Role: Bridge controller handling ISO7816 smart card interface, IrDA physical layer, and auto-baud rate detection on USART1. Use Value: Dual USART with ISO7816 and IrDA support enables secure payment peripheral integration without external transceivers. |
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, no DAC, no capacitive touch, 16 MHz max CPU, TSSOP20 package | Limited analog capability and no TSC; suitable only for basic digital control without precision analog functions | Select when BOM cost is critical and DAC/TSC/RTC calendar features are unnecessary |
| STM32F070F6P6 | 32 KB Flash, 6 KB SRAM, no TSC, 1x 12-bit ADC (1.1 µs), 1x USART, no I²C Fast Mode Plus | Missing Fast Mode Plus I²C and touch sensing; lower peripheral count reduces design flexibility for sensor-rich systems | Choose for simpler communication-centric designs where 1 Mbit/s I²C drive strength is not required |
Compared with STM32F030F4P6 and STM32F070F6P6, the STM32F051K8U6 offers higher Flash density, full 48 MHz performance, integrated DAC and TSC, and robust I²C drive - making it the optimal choice for analog-intensive, low-power embedded systems needing feature scalability.
Availability
STM32F051K8U6 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart thermostats, BLDC motor starters, and POS terminal peripherals requiring stable component supply across extended production lifecycles.
Supply support for STM32F051K8U6 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, MEMS, and automotive-grade components since 1987.
The STM32F0 series targets cost-sensitive, low-power embedded applications with Cortex-M0 cores, emphasizing analog integration, capacitive touch, and industrial reliability - positioning STM32F051K8U6 for smart sensors and human-machine interfaces.
FAQ
What is the maximum operating temperature range for STM32F051K8U6?
The STM32F051K8U6 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), where ambient operating conditions specify TA = –40 to 85 °C for all device variants including the K8U6. Thermal derating is not required within this range under specified VDD and load conditions.
Does STM32F051K8U6 support USB connectivity?
No, the STM32F051K8U6 does not include a USB peripheral. It lacks USB PHY, USB controller, and associated registers. Communication interfaces are limited to up to two USARTs, two SPIs (one with I²S), two I²C buses, HDMI CEC, and SWD debug. For USB-enabled designs, ST recommends the STM32F042 or STM32F072 series.
How many I²C interfaces does STM32F051K8U6 support, and what are their capabilities?
The STM32F051K8U6 supports up to two I²C interfaces. One supports Fast Mode Plus (1 Mbit/s) with 20 mA current sink capability, SMBus/PMBus compliance, and wakeup from Stop mode. The second operates in standard/fast mode (up to 400 kbit/s) without Fast Mode Plus enhancements. Both are fully configurable via registers and support 7-bit/10-bit addressing.
Is the STM32F051K8U6 pin-compatible with other STM32F051 variants?
Yes, the STM32F051K8U6 in UFQFPN32 is pin-compatible with STM32F051K4U6 and STM32F051K6U6. All share identical pin assignments, electrical characteristics, and package dimensions. Differences are limited to Flash size (16 KB/32 KB/64 KB) and minor feature enablement - verified in Table 1 (Device Summary) and Section 4 (Pinouts and pin descriptions) of the datasheet.
STM32F051K8U6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 32-UFQFN Exposed Pad
- Series:
- STM32F0
- Packaging:
- Tray
- 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:
- 27
- 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:
STM32F051K8U6 FAQ
1.How can I place an order for STM32F051K8U6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32F051K8U6 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 STM32F051K8U6 reliable?
The price and inventory of STM32F051K8U6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32F051K8U6 is usually 5 days.
3.What payment methods are accepted for STM32F051K8U6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32F051K8U6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32F051K8U6?
STM32F051K8U6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32F051K8U6 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 STM32F051K8U6?
For technical support, including STM32F051K8U6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32F051K8U6 requirements.
6.How does Aetrix verify that STM32F051K8U6 is sourced from the original manufacturer or authorized distributors?
All STM32F051K8U6 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 STM32F051K8U6 meets industry standards.
7.What is the process for return or replacement of STM32F051K8U6?
All STM32F051K8U6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32F051K8U6, 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 STM32F051K8U6 part is unused and in its original packaging.
Return procedure for STM32F051K8U6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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