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STMicroelectronics STM32L052K8U3TR
- Part No.:
- STM32L052K8U3TR
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 32-UFQFN Exposed Pad
- Datasheet:
-
STM32L052K8U3TR.pdf
- Description:
- IC MCU 32BIT 64KB FLASH 32UFQFPN
- Quantity:
- Payment:
- Shipping:
Inventory:11,472
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Product details
Overview
STM32L052K8U3TR 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 devices requiring sub-1 µA Stop mode current and <5 µs Flash wakeup.
For engineers reviewing the STM32L052K8U3TR datasheet, STM32L052K8U3TR pinout, STM32L052K8U3TR application, or STM32L052K8U3TR equivalent, key selection criteria include verified 0.4 µA Stop mode current, USB crystal-less operation down to 1.8 V, 12-bit DAC output buffer support, and 45 5V-tolerant I/Os with capacitive touch sensing capability.
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 HSI 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, and Run (88 µA/MHz); analog subsystem comprises dual ultra-low-power comparators (1.65 V min), 12-bit DAC with output buffers (1.8 V min), and temperature sensor with factory calibration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Arm Cortex-M0+ with MPU, 32 MHz max, 0.95 DMIPS/MHz - enables deterministic real-time control in energy-constrained edge nodes. |
| Memory | 64 KB Flash with ECC, 8 KB SRAM, 2 KB EEPROM with ECC - supports firmware updates and data logging with error resilience. |
| Power Modes | 0.4 µA Stop mode (16 wakeup lines), 0.27 µA Standby (2 wakeup pins), 88 µA/MHz Run - extends coin-cell battery life to multi-year operation. |
| Analog Peripherals | 12-bit ADC (1.14 Msps, 16 channels, down to 1.65 V), 12-bit DAC (1 channel, buffered, down to 1.8 V) - enables precision sensor signal acquisition and analog actuation without external components. |
| USB Interface | USB 2.0 crystal-less, battery charging detection, LPM - eliminates external crystal, reduces BOM cost and PCB area in portable USB peripherals. |
| I/O Capability | 45 I/Os (5V tolerant), up to 24 capacitive sensing channels - supports direct touch UI integration and mixed-voltage system interfacing. |
| Clock Sources | 16 MHz HSI (±1%), 48 MHz HSI (self-calibrated for USB), 32 kHz LSE (RTC calibratable), PLL - ensures accurate timing across power modes without external oscillators. |
Pinout & Package
STM32L052K8U3TR uses the UFQFPN32 (5×5 mm, 0.5 mm pitch) package with 32-pin layout optimized for compact, low-profile designs. Pin functions are validated per STMicroelectronics DS10182 Rev 10 Section 4 (Pin descriptions).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Core & I/O supply | 1.65–3.6 V input; powers digital logic and 5V-tolerant I/Os; requires local decoupling for low-noise operation. |
| VSS | Ground reference | Digital ground return; must be connected to low-impedance plane to maintain ADC/DAC accuracy and EMC performance. |
| PA0–PA15 | General-purpose I/O | Configurable as GPIO, ADC input, DAC output, or timer/communication alternate functions; PA0–PA7 support capacitive sensing. |
| USB_DM / USB_DP | USB 2.0 differential pair | Crysal-less USB interface; internal transceiver and trimming enable full-speed operation without external oscillator or PHY. |
| NRST | Active-low reset | Asynchronous reset input; accepts 1.65–3.6 V logic; internal pull-up ensures reliable startup after power-on or brownout. |
| BOOT0 | Boot mode select | High at reset enables system memory bootloader (USART/SPI); low enables user Flash execution - critical for field firmware recovery. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power Stop mode | 0.4 µA with 16 wakeup lines - enables long-term sensor sleep with fast, deterministic wake on external event. |
| Crystal-less USB | Self-calibrating 48 MHz RC oscillator with USB LPM support - removes crystal, saves ~$0.15 BOM cost and 1.5 mm² PCB area. |
| ECC-protected memories | Flash and EEPROM with Error Correction Code - prevents silent data corruption in safety-critical firmware and parameter storage. |
| Capacitive touch controller | 24-channel TSC supporting touchkey, linear, and rotary sensors - enables intuitive UI in wearables without dedicated touch IC. |
| Programmable voltage detector | PVD with 8 selectable thresholds - allows precise brownout detection and graceful shutdown before supply collapse. |
Applications
| Smart Wearable Sensor Node | Portable Medical Glucose Monitor |
|---|---|
Use Scenario: Compact wrist-worn device measuring heart rate and motion using analog front-end and capacitive buttons. IC Role / Device Role / Timing Role: Main MCU executing sensor fusion algorithms, managing USB battery charging, and driving capacitive UI via TSC. Use Value: 0.4 µA Stop mode extends CR2032 battery life beyond 12 months; crystal-less USB simplifies regulatory compliance for Class II medical devices. | Use Scenario: Handheld glucose meter with electrochemical strip interface, LCD display, and USB data export. IC Role / Device Role / Timing Role: System controller handling 12-bit ADC sampling of strip current, DAC-based reference generation, and USB HID communication. Use Value: 12-bit DAC with output buffer provides stable bias voltage for strip measurement; 2 KB EEPROM stores calibration coefficients with ECC integrity. |
| Industrial Wireless Temperature Transmitter | Low-Power Smart Meter Tamper Detection Module |
Use Scenario: Battery-powered RTD/thermistor node transmitting data via LoRaWAN gateway using UART-to-LoRa bridge. IC Role / Device Role / Timing Role: Sensor interface MCU acquiring 12-bit ADC readings, performing linearization, and managing UART/LPUART communication. Use Value: 0.8 µA Stop+RTC+8 KB RAM retention enables hourly wake-and-measure cycles while preserving context; -40 to 125 °C rating ensures outdoor deployment reliability. | Use Scenario: Tamper-detection add-on module monitoring enclosure door switches and magnetic fields in utility smart meters. IC Role / Device Role / Timing Role: Dedicated security monitor using ultra-low-power comparators and RTC alarm to detect unauthorized access during meter sleep. Use Value: Dual comparators with window mode and 1.65 V operation detect subtle voltage/current anomalies; 0.27 µA Standby mode ensures >10-year battery life. |
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 |
|---|---|---|---|
| STM32L072K8U3TR | 128 KB Flash, 20 KB SRAM, same package/peripherals - adds memory headroom for larger protocol stacks. | Suitable for BLE mesh nodes requiring OTA firmware update storage and larger crypto buffers. | Select when >64 KB Flash is needed for secure boot, TLS stack, or future feature expansion. |
| STM32L011K4U3TR | 16 KB Flash, 2 KB SRAM, no USB, no DAC - smaller memory, reduced peripheral set, lower cost. | Targeted at simple sensor endpoints where USB and analog output are unnecessary. | Choose for cost-sensitive, single-function nodes with minimal firmware footprint and no host connectivity. |
Compared with STM32L052K8U3TR, the L072 variant offers scalable memory for complex wireless protocols, while the L011 provides a leaner, lower-cost option for basic sensing - both retain identical ultra-low-power architecture and pin compatibility in UFQFPN32.
Availability
STM32L052K8U3TR is available at Aetrix Electronics and suitable for battery-powered IoT sensors, portable medical diagnostics, industrial wireless transmitters, and smart meter tamper modules requiring stable component supply across extended product lifecycles.
Supply support for STM32L052K8U3TR 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, sensors, and analog products 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 sleep currents and integrated analog functionality without external support components.
FAQ
What is the minimum operating voltage for the STM32L052K8U3TR's ADC and DAC?
The 12-bit ADC operates down to 1.65 V supply, enabling accurate measurements even as battery voltage declines; the 12-bit DAC with output buffer functions down to 1.8 V, supporting stable analog output generation across the full 1.65–3.6 V operating range with appropriate rail configuration.
Does the STM32L052K8U3TR support USB without an external crystal?
Yes - it integrates a self-calibrating 48 MHz RC oscillator (HSI48) with clock recovery system (CRS) that synchronizes to USB SOF packets, eliminating the need for an external crystal or oscillator while maintaining full-speed USB 2.0 compliance and battery charging detection capability.
How many I/O pins are 5V tolerant, and what is their maximum sink/source current?
45 I/O pins are 5V tolerant when VDD is ≥ 2.0 V; each pin supports ±20 mA DC sink/source per STMicroelectronics DS10182 Rev 10 Section 6.3.13, with absolute maximum ratings of -0.3 V to 5.5 V on I/Os - enabling direct interfacing with legacy 5V logic and sensors.
What is the wakeup time from Stop mode, and which peripherals remain active?
Wakeup time from Stop mode is 3.5 µs when code executes from RAM and 5 µs from Flash; during Stop mode, the RTC, backup registers, and selected wakeup lines (up to 16) remain powered, while CPU, Flash, and most peripherals are disabled to achieve 0.4 µA typical current consumption.
STM32L052K8U3TR 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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32L052K8U3TR FAQ
1.How can I place an order for STM32L052K8U3TR through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L052K8U3TR 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 STM32L052K8U3TR reliable?
The price and inventory of STM32L052K8U3TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L052K8U3TR is usually 5 days.
3.What payment methods are accepted for STM32L052K8U3TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L052K8U3TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L052K8U3TR?
STM32L052K8U3TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L052K8U3TR 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 STM32L052K8U3TR?
For technical support, including STM32L052K8U3TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L052K8U3TR requirements.
6.How does Aetrix verify that STM32L052K8U3TR is sourced from the original manufacturer or authorized distributors?
All STM32L052K8U3TR 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 STM32L052K8U3TR meets industry standards.
7.What is the process for return or replacement of STM32L052K8U3TR?
All STM32L052K8U3TR units undergo pre-shipment inspection (PSI). If there is an issue with STM32L052K8U3TR, 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 STM32L052K8U3TR part is unused and in its original packaging.
Return procedure for STM32L052K8U3TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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