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STMicroelectronics STM32L052K8U6TR
- Part No.:
- STM32L052K8U6TR
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 32-UFQFN Exposed Pad
- Datasheet:
-
STM32L052K8U6TR.pdf
- Description:
- IC MCU 32BIT 64KB FLASH 32UFQFPN
- Quantity:
- Payment:
- Shipping:
Inventory:3,199
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Product details
Overview
STM32L052K8U6TR 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.
For engineers reviewing the STM32L052K8U6TR datasheet, STM32L052K8U6TR pinout, STM32L052K8U6TR application, or STM32L052K8U6TR equivalent, key selection criteria include standby current (0.27 µA), USB self-clocking capability, 125 °C operating temperature, and 45 5V-tolerant I/Os for mixed-voltage system integration.
Technical Context
The device integrates a Cortex-M0+ core with MPU, running at up to 32 MHz with 0.95 DMIPS/MHz efficiency, supported by multiple clock sources including factory-trimmed 16 MHz HSI (+/-1%), 48 MHz HSI48 (USB-calibrated), and 32 kHz LSE for RTC. Its low-power architecture enables dynamic voltage scaling across three operating ranges (1.65–3.6 V).
Peripherals are managed via an interconnect matrix enabling concurrent DMA transfers across ADC, USB, DAC, and timers; analog subsystem includes two ultra-low-power comparators (down to 1.65 V), 12-bit DAC with output buffer (down to 1.8 V), and capacitive sensing controller supporting 24 channels for touch interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Arm Cortex-M0+, 32 MHz max - delivers deterministic real-time control with MPU for memory protection in safety-critical firmware. |
| Memory | 64 KB Flash (ECC), 8 KB SRAM, 2 KB EEPROM (ECC) - enables robust firmware storage, runtime data retention, and parameter logging without external NV memory. |
| Low-Power Modes | 0.27 µA Standby (2 wakeup pins), 0.8 µA Stop + RTC + 8 KB RAM retention - extends coin-cell battery life to multi-year operation in always-on sensor nodes. |
| Analog Peripherals | 12-bit ADC (1.14 Msps, 16 ch), 12-bit DAC (1 ch, buffered), 2x comparators (window mode + wake-up) - supports precision signal acquisition, actuator control, and threshold monitoring down to 1.65 V supply. |
| Connectivity | USB 2.0 crystal-less (LPM, battery charging detection), 2× USART (ISO 7816/IrDA), 4× SPI (16 Mbit/s), 2× I²C (SMBus/PMBus) - enables direct USB-C connectivity and industrial fieldbus interoperability without external timing components. |
| Timers & Security | 9 timers (including LPTIM, RTC, SysTick), CRC unit, true RNG, firewall - provides accurate timekeeping, secure firmware updates, and tamper-resistant cryptographic key generation. |
| I/O | 51 fast I/Os (45 × 5V tolerant), TSC (24-channel capacitive sensing) - simplifies interface to legacy 5V peripherals and enables touch UI on compact wearable form factors. |
Pinout & Package
UFQFPN32 (5 × 5 mm, 0.5 mm pitch) package with exposed thermal pad; 32-pin layout optimized for space-constrained PCBs in wearables and smart meters.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Main 1.65–3.6 V supply rail; decoupling required per datasheet section 6.1.6 for stable low-power operation. |
| VSS | Ground reference | Digital and analog ground return; separate AGND/VSS routing recommended for ADC/DAC accuracy. |
| PA0 | GPIO / ADC1_IN0 / TSC_G1_IO1 | Multi-function pin usable as analog input channel 0 or capacitive sensing electrode - enables single-pin sensor node design. |
| PA2 | USART2_TX / ADC1_IN2 / DAC_OUT1 | Shared UART transmit, ADC input, and DAC output - allows flexible peripheral mapping without external signal routing. |
| PA11/PA12 | USB_DM/USB_DP | Dedicated crystal-less USB differential pair - eliminates need for external 48 MHz crystal, reducing BOM cost and board area. |
| NRST | Active-low reset input | Asynchronous reset with internal pull-up; accepts 1.65–3.6 V logic - compatible with standard push-button or supervisor IC reset circuits. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power standby | 0.27 µA with 2 wakeup pins enabled - enables immediate wake-from-sleep response while preserving battery for >10 years on CR2032. |
| Crystal-less USB | HSI48 oscillator calibrated to ±0.25% for USB 2.0 compliance - removes external crystal and matching capacitors, cutting component count by 3. |
| ECC-protected memory | Flash and EEPROM with error correction - prevents silent data corruption in long-life deployments like utility metering or remote environmental loggers. |
| Capacitive sensing controller | 24-channel TSC with built-in charge transfer - supports touchkey, slider, and rotary controls without external IC, reducing firmware complexity and power overhead. |
| Programmable voltage detector | PVD with 8 selectable thresholds - enables precise brownout detection for graceful shutdown before critical voltage collapse in Li-ion battery systems. |
Applications
| Smart Wearable Sensor Node | Portable Medical Monitor |
|---|---|
Use Scenario: Compact wrist-worn device measuring heart rate, skin temperature, and motion using integrated ADC, DAC, and capacitive touch. IC Role / Device Role / Timing Role: Main system controller executing sensor fusion algorithms, managing USB data upload, and maintaining RTC-synchronized logging intervals. Use Value: 0.8 µA Stop mode + RTC + 8 KB RAM retention preserves session state and timestamp accuracy during sleep, extending battery life beyond 7 days on a 120 mAh cell. | Use Scenario: Handheld ECG or blood glucose meter requiring clinical-grade analog accuracy and regulatory-compliant firmware security. IC Role / Device Role / Timing Role: Safety-certified MCU handling analog front-end digitization, encrypted data storage in ECC EEPROM, and secure USB HID communication with host PC. Use Value: True RNG and firewall protection meet IEC 62304 Class B software requirements; 12-bit ADC with 1.14 Msps supports high-fidelity waveform capture at diagnostic sampling rates. |
| Industrial Wireless Sensor | Smart Utility Meter |
Use Scenario: Battery-powered LoRaWAN node monitoring temperature, humidity, and vibration in factory environments (-40 to 125 °C). IC Role / Device Role / Timing Role: Edge-processing MCU acquiring sensor data via ADC and comparators, compressing payloads, and triggering RF transmission on event or timer. Use Value: 5 µs wakeup from Flash enables rapid response to alarm conditions; 45 × 5V-tolerant I/Os interface directly to legacy 5V industrial sensors without level shifters. | Use Scenario: Static electricity-resistant electricity/water meter with tamper detection, pulse counting, and secure over-the-air firmware updates. IC Role / Device Role / Timing Role: Metering controller managing metrology ADC, EEPROM-based tariff storage, USB/UART for field service, and watchdog-protected bootloader. Use Value: 2 KB EEPROM with ECC ensures decade-long integrity of billing parameters; ECOPACK2 packaging meets RoHS/REACH compliance for global utility certifications. |
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 |
|---|---|---|---|
| STM32L072K8U6TR | 128 KB Flash, 20 KB RAM, no USB - adds more memory but removes crystal-less USB interface. | Suitable for larger firmware footprints where USB is replaced by UART/LoRa; not drop-in for USB-dependent designs. | Select when code size exceeds 64 KB and USB is unnecessary; verify pin compatibility for PA11/PA12 reassignment. |
| STM32L432KCU6 | Cortex-M4F core, FPU, 256 KB Flash, 64 KB SRAM, USB - higher performance but 2.5× higher active current (210 µA/MHz vs 88 µA/MHz). | Better for DSP-intensive tasks (e.g., FFT-based vibration analysis); less suitable for multi-year battery life targets. | Choose only if floating-point math or advanced filtering is required; confirm thermal budget for same PCB footprint. |
Compared with STM32L052K8U6TR, STM32L072K8U6TR trades USB for memory headroom, while STM32L432KCU6 prioritizes compute throughput over energy efficiency - making the L052 optimal for USB-connected, sub-µA standby, space-constrained edge nodes.
Availability
STM32L052K8U6TR is available at Aetrix Electronics and suitable for battery-powered IoT sensors, portable medical monitors, and smart utility meters requiring stable component supply across extended product lifecycles.
Supply support for STM32L052K8U6TR 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, designing and manufacturing microcontrollers, power management ICs, and MEMS sensors for industrial, automotive, and consumer markets.
This part belongs to the STM32L0 ultra-low-power MCU product line, engineered specifically for energy-harvesting and battery-operated applications demanding sub-µA standby, integrated analog, and USB connectivity without external crystals.
FAQ
What is the maximum operating temperature range for STM32L052K8U6TR?
The device is rated for -40 °C to +125 °C ambient operation, validated per datasheet section 6.3.1. This extended range supports deployment in under-hood automotive modules, industrial motor drives, and outdoor utility infrastructure where thermal stress is critical.
Does STM32L052K8U6TR support USB without an external crystal?
Yes - it integrates a factory-calibrated 48 MHz HSI48 oscillator with clock recovery system (CRS) for full USB 2.0 compliance in crystal-less mode, eliminating the need for external 48 MHz crystal and associated load capacitors per section 3.18.5 of DS10182 Rev 10.
How many I/O pins are 5V tolerant on this MCU?
45 of the 51 general-purpose I/Os are 5V tolerant, as confirmed in Table 2 and section 3.7 of the datasheet. This allows direct interfacing with legacy 5V peripherals such as RS-232 transceivers, industrial PLC inputs, and older sensor modules without level-shifting circuitry.
Is the 2 KB EEPROM truly write-endurable and retention-guaranteed?
Yes - the embedded data EEPROM supports 100,000 write/erase cycles and 20-year data retention at 85 °C, verified in Table 53 of DS10182 Rev 10. ECC protection further ensures bit-error-free operation over the full lifetime, critical for metering and calibration storage.
STM32L052K8U6TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 32-UFQFN Exposed Pad
- Series:
- STM32L0
- Packaging:
- Tape & Reel (TR)
- 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:
STM32L052K8U6TR FAQ
1.How can I place an order for STM32L052K8U6TR through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L052K8U6TR 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 STM32L052K8U6TR reliable?
The price and inventory of STM32L052K8U6TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L052K8U6TR is usually 5 days.
3.What payment methods are accepted for STM32L052K8U6TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L052K8U6TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L052K8U6TR?
STM32L052K8U6TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L052K8U6TR 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 STM32L052K8U6TR?
For technical support, including STM32L052K8U6TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L052K8U6TR requirements.
6.How does Aetrix verify that STM32L052K8U6TR is sourced from the original manufacturer or authorized distributors?
All STM32L052K8U6TR 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 STM32L052K8U6TR meets industry standards.
7.What is the process for return or replacement of STM32L052K8U6TR?
All STM32L052K8U6TR units undergo pre-shipment inspection (PSI). If there is an issue with STM32L052K8U6TR, 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 STM32L052K8U6TR part is unused and in its original packaging.
Return procedure for STM32L052K8U6TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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