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STMicroelectronics STM32L052K8U6D
- Part No.:
- STM32L052K8U6D
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 32-UFQFN Exposed Pad
- Datasheet:
-
STM32L052K8U6D.pdf
- Description:
- IC MCU 32BIT 64KB FLASH 32UFQFPN
- Quantity:
- Payment:
- Shipping:
Inventory:1,487
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Product details
Overview
STM32L052K8U6D from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M0+ microcontroller in UFQFPN32 (5×5 mm) package, featuring 64 KB Flash, 8 KB SRAM, 2 KB EEPROM with ECC, 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 STM32L052K8U6D datasheet, STM32L052K8U6D pinout, STM32L052K8U6D application, or STM32L052K8U6D equivalent, key selection criteria include verified 0.4 µA Stop mode current, USB crystal-less timing tolerance, 45 I/Os with 5V tolerance, and 125 °C extended temperature support for industrial edge nodes.
Technical Context
The device integrates a Cortex-M0+ core with MPU, operating from 32 kHz to 32 MHz, delivering 0.95 DMIPS/MHz; its clock system includes factory-trimmed 16 MHz HSI (+/-1%), self-calibrating 48 MHz HSI48 for USB, and 32 kHz LSE for RTC with calibration.
Ultra-low-power architecture enables five low-power modes: Standby (0.27 µA), Stop (0.4 µA), Stop+RTC+RAM retention (0.8 µA), Low-power Run (88 µA/MHz), and Run mode with 3.5 µs wakeup from RAM - all supported by BOR with 5 selectable thresholds and programmable voltage detector (PVD).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Arm Cortex-M0+ with MPU, 32 MHz max frequency, 0.95 DMIPS/MHz performance |
| Memory | 64 KB Flash with ECC, 8 KB SRAM, 2 KB data EEPROM with ECC - enables firmware updates and parameter storage without external memory |
| Power Consumption | 0.4 µA in Stop mode (16 wakeup lines), 0.8 µA in Stop+RTC+8 KB RAM retention - extends 10-year battery life in coin-cell applications |
| Analog Peripherals | 12-bit ADC (1.14 Msps, 16 channels), 12-bit DAC (1 channel), 2 ultra-low-power comparators - supports sensor signal conditioning and analog actuation |
| USB Interface | USB 2.0 crystal-less, battery charging detection, LPM support - eliminates external crystal, reduces BOM cost and PCB area |
| I/O Capability | Up to 51 fast I/Os (45 5V-tolerant), capacitive sensing on 24 channels - enables direct touch interface and mixed-voltage system integration |
| Operating Range | 1.65 V to 3.6 V supply, -40 °C to +125 °C ambient - suitable for automotive cabin modules and industrial field transmitters |
Pinout & Package
STM32L052K8U6D uses the UFQFPN32 (5×5 mm, 0.5 mm pitch) package with 32-pin layout optimized for compact, thermally constrained designs. Pin functions are validated per STMicroelectronics DS10182 Rev 10, Table 16.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Main power supply (1.65–3.6 V) | Supplies core and I/O domains; decoupling required per datasheet layout guidelines |
| VSS | GND reference | Dual ground pins ensure stable return path for analog/digital sections |
| PA0 | GPIO / ADC1_IN0 / TSC_G1_IO1 | Configurable as analog input, touch sense channel, or general-purpose I/O |
| PA2 | USART2_TX / ADC1_IN2 / DAC_OUT1 | Shared UART transmit, ADC input, and DAC output - enables serial telemetry and analog feedback |
| PA11/PA12 | USB_DM/USB_DP | Dedicated crystal-less USB differential pair; no external oscillator needed |
| NRST | Active-low reset input | Accepts 1.65–3.6 V logic; internal pull-up ensures reliable startup after brownout |
| BOOT0 | Boot mode selection | High at reset enters system memory bootloader (USART/SPI); enables field firmware recovery |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power Stop mode | 0.4 µA with 16 wakeup lines - enables wake-on-sensor-event in always-on monitoring systems |
| Crystal-less USB 2.0 | HSI48 self-calibration against USB SOF packets - removes 12 MHz crystal, saves ~$0.15 BOM cost and 2 mm² PCB space |
| ECC-protected memories | Flash and EEPROM with error correction - prevents silent data corruption in long-life deployments (e.g., utility meters) |
| Capacitive touch controller | 24-channel TSC supporting touchkey, linear, and rotary sensors - enables intuitive HMI without external IC |
| Temperature sensor & VREFINT | Calibrated internal sensor (±1.5 °C accuracy) and 1.22 V reference - allows self-contained environmental monitoring and ADC/DAC calibration |
Applications
| Smart Utility Meter | Portable ECG Monitor |
|---|---|
Use Scenario: Battery-powered gas/water meter logging consumption every 15 minutes and transmitting via NB-IoT. IC Role / Device Role / Timing Role: Main MCU handling sensor acquisition (pulse counting, pressure ADC), secure data encryption, and low-duty-cycle RF transmission scheduling. Use Value: 0.4 µA Stop mode and 5 µs Flash wakeup enable >10-year battery life while maintaining precise timekeeping via RTC and tamper detection. | Use Scenario: Handheld clinical device acquiring 3-lead ECG signals, performing real-time QRS detection, and storing waveform snippets. IC Role / Device Role / Timing Role: Signal processing unit running FIR filters on ADC data, driving OLED display via SPI, and managing USB-C charging negotiation. Use Value: 12-bit ADC (1.14 Msps) captures high-fidelity biopotentials; crystal-less USB enables direct PC connection for firmware updates and data export without external PHY. |
| Industrial Wireless Sensor Node | Automotive Cabin Air Quality Module |
Use Scenario: DIN-rail mounted node measuring CO₂, humidity, and VOC levels using digital and analog sensors, reporting via LoRaWAN. IC Role / Device Role / Timing Role: Central controller interfacing I²C gas sensors, reading analog NDIR outputs, and managing deep-sleep duty cycling. Use Value: 45 5V-tolerant I/Os simplify connection to legacy analog sensors; PVD and BOR ensure robust operation during unstable 24 VDC supply transients. | Use Scenario: In-vehicle air quality monitor detecting PM2.5, NO₂, and formaldehyde, with CAN bus integration and HVAC control feedback. IC Role / Device Role / Timing Role: Sensor fusion hub aggregating I²C sensor data, executing air quality index algorithms, and communicating over LIN/CAN via external transceiver. Use Value: -40 °C to +125 °C rating meets automotive AEC-Q100 Grade 2 requirements; 2 KB EEPROM stores calibration coefficients across thermal cycles. |
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 |
|---|---|---|---|
| STM32L072K8U6 | 128 KB Flash, 20 KB SRAM, same peripherals and package - adds memory headroom for larger protocol stacks | Better suited for BLE mesh nodes requiring OTA update storage and dual-bank Flash | Select when firmware size exceeds 64 KB or future-proofing for feature expansion is required |
| STM32L053K8U6 | Same memory and peripherals but adds AES-128 hardware crypto engine and true RNG | Required for FIPS-compliant secure boot, encrypted sensor data transmission, or PKI-based authentication | Choose when end-device security certification (e.g., IEC 62443) mandates cryptographic acceleration |
Compared with STM32L052K8U6D, STM32L072K8U6 offers scalable memory for complex connectivity stacks, while STM32L053K8U6 adds certified crypto primitives - both retain identical low-power behavior, pinout, and toolchain compatibility, enabling drop-in migration where memory or security demands increase.
Availability
STM32L052K8U6D is available at Aetrix Electronics and suitable for smart utility meters, portable medical monitors, industrial wireless sensor nodes, and automotive cabin air quality modules requiring stable component supply across multi-year production cycles.
Supply support for STM32L052K8U6D 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 analog products for industrial, automotive, and consumer markets.
The STM32L0 series targets ultra-low-power embedded applications demanding sub-1 µA standby current, integrated analog peripherals, and extended temperature operation - optimized for battery longevity and system-level integration in resource-constrained environments.
FAQ
Does STM32L052K8U6D support USB device mode without an external crystal?
Yes. The part integrates a self-calibrating 48 MHz HSI48 RC oscillator synchronized to USB Start-of-Frame (SOF) tokens, enabling full-speed USB 2.0 device operation without external crystal or oscillator - confirmed in DS10182 Section 3.18.5 and electrical characteristics Table 47.
What is the maximum number of 5V-tolerant I/Os on STM32L052K8U6D?
It provides 45 5V-tolerant I/Os across its UFQFPN32 package, as specified in the "Device summary" (Table 1) and "I/O port characteristics" (Table 59) of DS10182 Rev 10 - allowing direct interface with legacy 5V logic and sensors without level shifters.
Can the 2 KB EEPROM be used for wear-leveling in data logging applications?
Yes. The 2 KB data EEPROM supports up to 100,000 write/erase cycles and 40-year data retention at 85 °C (DS10182 Table 53), and ST provides HAL drivers with built-in wear-leveling algorithms - enabling robust circular buffer logging in utility meters and predictive maintenance sensors.
Is the RTC operational in Standby mode with VBAT supplied?
Yes. When VBAT is connected and enabled, the RTC continues running in Standby mode with 0.27 µA current (DS10182 Section 3.6 and Table 37), retaining time, alarms, and 20-byte backup registers - critical for timestamped event logging in energy-harvesting systems.
STM32L052K8U6D 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:
STM32L052K8U6D FAQ
1.How can I place an order for STM32L052K8U6D through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L052K8U6D 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 STM32L052K8U6D reliable?
The price and inventory of STM32L052K8U6D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L052K8U6D is usually 5 days.
3.What payment methods are accepted for STM32L052K8U6D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L052K8U6D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L052K8U6D?
STM32L052K8U6D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L052K8U6D 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 STM32L052K8U6D?
For technical support, including STM32L052K8U6D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L052K8U6D requirements.
6.How does Aetrix verify that STM32L052K8U6D is sourced from the original manufacturer or authorized distributors?
All STM32L052K8U6D 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 STM32L052K8U6D meets industry standards.
7.What is the process for return or replacement of STM32L052K8U6D?
All STM32L052K8U6D units undergo pre-shipment inspection (PSI). If there is an issue with STM32L052K8U6D, 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 STM32L052K8U6D part is unused and in its original packaging.
Return procedure for STM32L052K8U6D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STM32L052K8U6D Tags
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