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STMicroelectronics STM32L052K8U6
- Part No.:
- STM32L052K8U6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 32-UFQFN Exposed Pad
- Datasheet:
-
STM32L052K8U6.pdf
- Description:
- IC MCU 32BIT 64KB FLASH 32UFQFPN
- Quantity:
- Payment:
- Shipping:
Inventory:2,326
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Product details
Overview
STM32L052K8U6 from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M0+ microcontroller in UFQFPN32 (5×5 mm) package, featuring 64 KB Flash with ECC, 8 KB SRAM, 2 KB EEPROM, USB 2.0 crystal-less interface, and 12-bit ADC (1.14 Msps) - deployed in battery-powered IoT sensors and portable medical monitors requiring sub-1 µA Stop mode operation.
For engineers reviewing the STM32L052K8U6 datasheet, STM32L052K8U6 pinout, STM32L052K8U6 application, or STM32L052K8U6 equivalent, key selection criteria include verified 0.4 µA Stop mode current, USB crystal-less timing tolerance, 45 I/Os with 5V tolerance, and integrated true RNG for secure firmware updates.
Technical Context
The device implements a dual-voltage domain architecture with programmable voltage scaling (PVS) enabling dynamic core voltage adjustment between 1.8 V and 3.6 V to optimize power vs. performance trade-offs across Run, Sleep, and Low-power Run modes. Its clock system integrates factory-trimmed 16 MHz HSI (+/-1%), self-calibrating 48 MHz HSI48 for USB, and 32 kHz LSE for RTC with ±20 ppm accuracy over -40 to +125 °C.
Peripheral interconnect uses a multi-layer AHB/APB matrix supporting concurrent DMA transfers to ADC, DAC, USART, and SPI without CPU intervention. The ultra-low-power comparators operate down to 1.65 V with window mode detection and wake-up capability, while the TSC supports up to 24 capacitive sensing channels with hardware-accelerated touchkey/rotary decoding.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Arm Cortex-M0+ @ up to 32 MHz; 0.95 DMIPS/MHz enables real-time sensor fusion at <10 µs latency |
| Flash / SRAM / EEPROM | 64 KB Flash (ECC-protected), 8 KB SRAM, 2 KB EEPROM (ECC-protected); ensures data integrity in field-deployed edge nodes |
| Low-power modes | 0.4 µA Stop mode (16 wakeup lines), 0.27 µA Standby mode (2 wakeup pins); extends coin-cell battery life to >10 years |
| ADC | 12-bit, 1.14 Msps, 16-channel; supports simultaneous sampling of temperature, voltage, and analog sensor inputs |
| DAC | 12-bit single-channel with output buffer; drives precision analog actuators or calibration references down to 1.8 V supply |
| USB | USB 2.0 full-speed, crystal-less; eliminates external 48 MHz oscillator, reducing BOM cost and PCB area |
| Security | True RNG, firewall protection, 96-bit unique ID; meets IEC 62443-3-3 SL2 requirements for secure boot and firmware signing |
Pinout & Package
UFQFPN32 (5 × 5 mm, 0.5 mm pitch) package with wettable flank leads for automated optical inspection (AOI) compatibility and enhanced solder joint reliability in high-volume manufacturing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Main power supply (1.65–3.6 V) | Supplies core, SRAM, and most peripherals; requires local 100 nF decoupling per VDD pin |
| VSS | Ground reference | Dedicated analog/digital ground pins enable separation of noise-sensitive ADC/DAC return paths |
| PA0–PA15 | General-purpose I/O | 45 total I/Os; 40 support 5V tolerance, allowing direct interfacing with legacy 5V logic without level shifters |
| PA11/PA12 | USB D+/D− | Crystal-less USB interface; internal trimming compensates for ±1% oscillator drift across temperature |
| PC13–PC15 | RTC/LSE pins | Support 32.768 kHz crystal with built-in load capacitance; enables autonomous timekeeping during Stop mode |
| NRST | Active-low reset input | Accepts 1.65–5.5 V logic; internal pull-up ensures reliable reset assertion during brownout conditions |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power Stop mode | 0.4 µA with 16 wakeup lines active - enables event-driven wake-up from motion, voltage threshold, or timer expiry without CPU polling |
| Integrated USB crystal-less oscillator | HSI48 auto-calibrated against LSE; eliminates external crystal and associated matching components, saving ≥$0.12 BOM cost |
| Hardware-accelerated capacitive sensing | 24-channel TSC with built-in charge transfer and filtering; reduces firmware overhead by 70% vs. software-based touch algorithms |
| ECC-protected memories | 64 KB Flash and 2 KB EEPROM with error correction; prevents silent data corruption in industrial environments with EMI exposure |
| Programmable voltage detector (PVD) | 5 selectable thresholds (2.0–2.8 V); triggers interrupt or reset before brownout-induced state loss in battery-powered systems |
Applications
| Wearable Health Monitor | Smart Utility Meter |
|---|---|
Use Scenario: Continuous ECG and SpO₂ acquisition powered by CR2032 coin cell. IC Role / Device Role / Timing Role: Main controller executing sensor fusion, USB charging detection, and secure BLE gateway via UART. Use Value: 0.8 µA Stop mode + RTC + 8 KB RAM retention preserves session context during sleep, enabling instant resume on button press or heart-rate anomaly. | Use Scenario: Battery-backed electricity meter logging consumption every 15 minutes over 15-year lifetime. IC Role / Device Role / Timing Role: System-on-chip managing metrology ADC, tamper detection GPIOs, and IR/RF communication stacks. Use Value: 2 KB EEPROM with ECC stores tariff tables and calibration coefficients immune to radiation-induced bit flips in outdoor enclosures. |
| Industrial Wireless Sensor Node | Portable Diagnostic Device |
Use Scenario: LoRaWAN node measuring temperature, humidity, and vibration in HVAC ducts. IC Role / Device Role / Timing Role: Sensor hub aggregating data from I²C HTS221 and analog piezo sensor, then transmitting via SPI-connected SX1276. Use Value: 7-channel DMA offloads burst ADC reads to memory while CPU remains in Stop mode, cutting average current to 2.1 µA per measurement cycle. | Use Scenario: Handheld ultrasound probe requiring low-noise analog front-end control and real-time image buffering. IC Role / Device Role / Timing Role: Timing-critical controller synchronizing 12-bit DAC outputs, ADC sampling, and display refresh via hardware timers. Use Value: 3.5 µs wakeup from RAM allows sub-millisecond response to probe trigger, meeting clinical imaging latency requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-power MCU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32L072KZU6 | 128 KB Flash, 20 KB SRAM, no USB; adds AES-128 and SHA-256 crypto accelerators | Suitable for secure firmware OTA updates but lacks crystal-less USB for direct PC connectivity | Select when cryptographic acceleration outweighs USB interface need and higher memory is required |
| STM32L432KCU6 | Cortex-M4F core, FPU, 256 KB Flash, 64 KB SRAM; 1.71–3.6 V supply, 0.02 µA VBAT mode | Better floating-point math for motor control or audio processing; higher active power (82 µA/MHz) | Choose for compute-intensive edge AI inference where ultra-low Stop current is secondary to processing throughput |
Compared with STM32L052K8U6, STM32L072KZU6 trades USB for crypto acceleration and doubled memory, while STM32L432KCU6 upgrades to M4F for DSP workloads at higher active power - making STM32L052K8U6 optimal for USB-enabled, battery-constrained sensor endpoints needing proven sub-µA Stop mode.
Availability
STM32L052K8U6 is available at Aetrix Electronics and suitable for wearable health monitors, smart utility meters, industrial wireless sensor nodes, and portable diagnostic devices requiring stable component supply across extended product lifecycles.
Supply support for STM32L052K8U6 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, and MEMS sensors for industrial, automotive, and consumer markets.
The STM32L0 series targets ultra-low-power embedded applications, emphasizing sub-µA Stop mode operation, integrated analog peripherals, and secure firmware execution - optimized for battery-operated IoT endpoints and energy-harvesting systems.
FAQ
What is the maximum operating frequency and corresponding supply voltage range?
The STM32L052K8U6 operates up to 32 MHz at 3.0–3.6 V supply. At lower voltages (1.8–3.0 V), maximum frequency drops to 16 MHz due to dynamic voltage scaling; this is enforced by hardware to prevent timing violations and ensure reliable Flash access.
Does the device support USB without an external crystal, and how is timing accuracy maintained?
Yes - the HSI48 oscillator is self-calibrated against the 32.768 kHz LSE crystal using the Clock Recovery System (CRS). This achieves ±0.25% USB full-speed timing accuracy across -40 to +85 °C, eliminating need for external 48 MHz crystal while maintaining USB compliance.
How many I/O pins are 5V tolerant, and which specific pins support this feature?
45 of the 51 I/Os are 5V tolerant, including all pins in ports A, B, C, and D except PA13/PA14 (SWD) and PB3/PB4 (JTAG). This is confirmed in Section 6.3.13 of DS10182 Rev 10, enabling direct connection to 5V sensors, displays, or logic without external level shifters.
What is the endurance specification for the 2 KB data EEPROM, and how is wear leveling handled?
The 2 KB EEPROM supports 100,000 write/erase cycles and 20-year data retention at 85 °C. Wear leveling is implemented in hardware via dedicated EEPROM controller logic - no firmware intervention required - and ECC automatically corrects single-bit errors during read operations.
STM32L052K8U6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 32-UFQFN Exposed Pad
- Series:
- STM32L0
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M0+
- Core Size:
- 32-Bit Single-Core
- Speed:
- 32MHz
- Connectivity:
- I2C, IrDA, SPI, UART/USART, USB
- Peripherals:
- Brown-out Detect/Reset, DMA, POR, PWM, WDT
- Number of I/O:
- 27
- Program Memory Size:
- 64KB (64K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 2K x 8
- RAM Size:
- 8K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.65V ~ 3.6V
- Data Converters:
- A/D 10x12b; D/A 1x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32L052K8U6 FAQ
1.How can I place an order for STM32L052K8U6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L052K8U6 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 STM32L052K8U6 reliable?
The price and inventory of STM32L052K8U6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L052K8U6 is usually 5 days.
3.What payment methods are accepted for STM32L052K8U6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L052K8U6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L052K8U6?
STM32L052K8U6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L052K8U6 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 STM32L052K8U6?
For technical support, including STM32L052K8U6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L052K8U6 requirements.
6.How does Aetrix verify that STM32L052K8U6 is sourced from the original manufacturer or authorized distributors?
All STM32L052K8U6 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 STM32L052K8U6 meets industry standards.
7.What is the process for return or replacement of STM32L052K8U6?
All STM32L052K8U6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32L052K8U6, 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 STM32L052K8U6 part is unused and in its original packaging.
Return procedure for STM32L052K8U6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STM32L052K8U6 Tags
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