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STMicroelectronics STM32L052K6U6TR
- Part No.:
- STM32L052K6U6TR
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 32-UFQFN Exposed Pad
- Datasheet:
-
STM32L052K6U6TR.pdf
- Description:
- IC MCU 32BIT 32KB FLASH 32UFQFPN
- Quantity:
- Payment:
- Shipping:
Inventory:17,164
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Product details
Overview
STM32L052K6U6TR from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M0+ microcontroller in UFQFPN32 (5×5 mm) package, featuring 32 MHz max CPU frequency, 32 KB Flash, 8 KB SRAM, and 2 KB EEPROM with ECC. It integrates USB 2.0 (crystal-less), 12-bit ADC (1.14 Msps, 16 channels), 12-bit DAC, two ultra-low-power comparators, and capacitive touch sensing-designed for battery-powered IoT sensor nodes requiring sub-µA standby operation and fast wake-up.
For engineers reviewing the STM32L052K6U6TR datasheet, STM32L052K6U6TR pinout, STM32L052K6U6TR application, or STM32L052K6U6TR equivalent, key selection criteria include verified 0.27 µA Standby current, USB crystal-less operation down to 1.65 V, 32 KB Flash with ECC, 51 I/Os (45 tolerant to 5 V), and full SWD debug support in a 32-pin QFN.
Technical Context
This MCU implements a dual-voltage domain architecture with separate regulator domains for core and I/O, enabling dynamic voltage scaling across Run, Sleep, Low-power Run, Stop, and Standby modes. Its clock system combines five internal oscillators-including factory-trimmed 16 MHz HSI (+/-1%), self-calibrating 48 MHz HSI48 for USB, and 37 kHz LSI-with external crystal support (1–25 MHz HSE, 32 kHz LSE).
The peripheral interconnect matrix routes DMA channels to ADC, DAC, USART, SPI, I2C, and timers without CPU intervention. The TSC supports up to 24 capacitive sensing channels with hardware-accelerated touchkey/linear/rotary decoding, while the CRC unit and 96-bit unique ID enable secure firmware integrity checks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M0+ with MPU, 32 MHz max, 0.95 DMIPS/MHz - delivers deterministic real-time control at ultra-low power. |
| Memory | 32 KB Flash (ECC-protected), 8 KB SRAM, 2 KB EEPROM (ECC-protected) - enables robust firmware storage and data logging in harsh environments. |
| Power Consumption | 0.27 µA Standby (2 wakeup pins), 0.4 µA Stop (16 wakeup lines), 88 µA/MHz Run - sustains multi-year battery life in coin-cell applications. |
| 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), 2x comparators (window mode + wake-up) - supports precision sensor signal chain without external components. |
| USB Interface | USB 2.0 Full-Speed, crystal-less, with battery charging detection and LPM - eliminates external crystal and reduces BOM cost for portable devices. |
| I/O & Packaging | Up to 51 fast I/Os (45 tolerant to 5 V), UFQFPN32 (5×5 mm, 0.5 mm pitch) - enables compact PCB layout with mixed-voltage interfacing. |
| Debug & Security | Serial Wire Debug (SWD), True RNG, firewall protection, 96-bit unique ID - supports secure firmware development and field updates. |
Pinout & Package
STM32L052K6U6TR is housed in a 32-pin Ultra-Fine Pitch Quad Flat No-lead (UFQFPN32) package measuring 5×5 mm with 0.5 mm pitch and exposed thermal pad. This RoHS-compliant ECOPACK2 package supports automated assembly and provides efficient thermal dissipation for continuous low-power operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Core power supply | 1.65–3.6 V input powering CPU, memories, and digital peripherals; requires local decoupling. |
| VSS | Digital ground | Reference return path for digital logic and I/Os; must be connected to system ground plane. |
| NRST | Active-low reset input | Asynchronous reset trigger; internal pull-up ensures reliable startup without external RC network. |
| PA0–PA15 | General-purpose I/Os | Configurable as GPIO, ADC inputs, timer channels, or communication interfaces (e.g., PA2/PA3 = USART2); 45 pins are 5 V tolerant. |
| PA11/PA12 | USB D+/D− | Differential USB 2.0 Full-Speed interface; crystal-less operation enabled via internal HSI48 calibration. |
| VREF+ | Analog reference positive | Optional external reference for ADC/DAC; internal VREFINT (1.22 V) available when not used. |
| VBAT | Backup power supply | Supplies RTC and 20-byte backup registers during main power loss; accepts 1.65–3.6 V. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power standby mode | 0.27 µA with two wakeup pins active - extends shelf life and operational duration in intermittently active sensors. |
| Crystal-less USB 2.0 | Internal 48 MHz HSI48 oscillator calibrated to ±0.25% - removes external crystal and matching capacitors, reducing BOM count and board area. |
| Capacitive touch controller (TSC) | 24-channel hardware-accelerated sensing with noise immunity - enables robust touchkey, slider, and rotary implementations without host CPU overhead. |
| ECC-protected memory | Flash and EEPROM with error correction coding - prevents silent data corruption in long-life industrial deployments. |
| Programmable voltage detector (PVD) | 7-level threshold monitoring of VDD - triggers interrupt or reset before brownout, protecting against unreliable operation during battery sag. |
Applications
| Smart Utility Metering | Wearable Health Monitor |
|---|---|
|
Use Scenario: Battery-powered gas/water meter with pulse counting, LCD display, and RF telemetry. IC Role / Device Role / Timing Role: Main system controller managing sensor acquisition, real-time clock, low-power display driver, and sub-GHz transceiver interface. Use Value: 0.4 µA Stop mode with 16 wakeup lines enables precise hourly wake-ups for data logging while preserving 10+ year battery life. |
Use Scenario: Optical heart-rate monitor using photoplethysmography (PPG) with analog front-end and Bluetooth LE connectivity. IC Role / Device Role / Timing Role: Signal processor acquiring ADC samples, computing heart rate via FIR filtering, and driving BLE stack over UART. Use Value: 12-bit ADC with 1.14 Msps sampling and integrated DAC for LED bias control reduce external component count and improve SNR. |
| Industrial Wireless Sensor Node | Asset Tracking Beacon |
|
Use Scenario: Temperature/humidity/pressure node deployed in factory environment with LoRaWAN backhaul. IC Role / Device Role / Timing Role: Data aggregator reading multiple sensors via I2C/SPI, performing local compensation, and scheduling periodic transmissions. Use Value: 2 KB EEPROM with ECC stores calibration coefficients and event logs reliably across 100k write cycles and 20-year retention. |
Use Scenario: GPS-denied indoor asset tracker using BLE proximity and accelerometer-based motion detection. IC Role / Device Role / Timing Role: Motion-triggered controller waking from Standby on accelerometer interrupt, capturing location context, and broadcasting BLE beacon packets. Use Value: 0.27 µA Standby current with dual wakeup pins allows years of operation on CR2032, even with frequent motion events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-power microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32L072KBU6 | 64 KB Flash, 20 KB RAM, same UFQFPN32 package, adds AES-128 and SHA-256 crypto accelerators | Required for firmware signing, secure OTA updates, or encrypted sensor data transmission | Select when cryptographic acceleration and larger memory footprint justify higher cost and power in active mode. |
| STM32L412KBU6 | Cortex-M4F core, 100 µA/MHz Run, 1.71–3.6 V, no USB, adds FPU and ART Accelerator | Suitable for floating-point sensor fusion (e.g., IMU + magnetometer) but lacks USB and has higher active power | Choose for computationally intensive algorithms where USB is unnecessary and higher active power is acceptable. |
Compared with STM32L052K6U6TR, STM32L072KBU6 offers enhanced security and memory for scalable firmware, while STM32L412KBU6 trades USB and ultra-low standby for floating-point performance-making the L052 optimal for cost-sensitive, battery-constrained USB-connected edge nodes.
Availability
STM32L052K6U6TR is available at Aetrix Electronics and suitable for smart utility metering, wearable health monitors, industrial wireless sensor nodes, and asset tracking beacons requiring stable component supply across extended product lifecycles.
Supply support for STM32L052K6U6TR 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, sensors, and automotive semiconductors.
The STM32L0 series targets ultra-low-power embedded applications, emphasizing sub-µA standby operation, fast wake-up, and integrated analog peripherals for battery-operated IoT endpoints and energy-harvesting systems.
FAQ
What is the minimum operating voltage for STM32L052K6U6TR's USB interface?
The USB 2.0 interface operates crystal-less down to 1.65 V supply, leveraging the internally calibrated 48 MHz HSI48 oscillator. This allows full USB functionality-including enumeration and data transfer-at the lowest end of the device's specified 1.65–3.6 V operating range, critical for single-cell Li-ion or alkaline battery applications.
Does STM32L052K6U6TR support hardware-accelerated capacitive touch sensing?
Yes-it integrates a dedicated Touch Sensing Controller (TSC) supporting up to 24 capacitive sensing channels with built-in charge transfer, spread-spectrum modulation, and noise filtering. This enables robust touchkey, linear slider, and rotary encoder implementations without consuming CPU cycles or requiring external components.
How many I/O pins on STM32L052K6U6TR are 5 V tolerant?
45 of the 51 general-purpose I/Os are 5 V tolerant, allowing direct connection to legacy 5 V peripherals (e.g., RS-232 transceivers, industrial sensors, or older microcontrollers) without level-shifting circuitry-reducing design complexity and bill-of-materials cost.
What debug interface does STM32L052K6U6TR provide, and is it available in all power modes?
It supports Serial Wire Debug (SWD) via SWCLK and SWDIO pins, compatible with standard ARM debug probes. SWD remains accessible in Run, Sleep, and Low-power Run modes, but is disabled in Stop and Standby modes to preserve ultra-low power-requiring wake-up via NVIC or EXTI before resuming debug session.
STM32L052K6U6TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 32-UFQFN Exposed Pad
- Series:
- STM32L0
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- 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:
- 32KB (32K 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:
STM32L052K6U6TR FAQ
1.How can I place an order for STM32L052K6U6TR through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L052K6U6TR 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 STM32L052K6U6TR reliable?
The price and inventory of STM32L052K6U6TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L052K6U6TR is usually 5 days.
3.What payment methods are accepted for STM32L052K6U6TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L052K6U6TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L052K6U6TR?
STM32L052K6U6TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L052K6U6TR 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 STM32L052K6U6TR?
For technical support, including STM32L052K6U6TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L052K6U6TR requirements.
6.How does Aetrix verify that STM32L052K6U6TR is sourced from the original manufacturer or authorized distributors?
All STM32L052K6U6TR 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 STM32L052K6U6TR meets industry standards.
7.What is the process for return or replacement of STM32L052K6U6TR?
All STM32L052K6U6TR units undergo pre-shipment inspection (PSI). If there is an issue with STM32L052K6U6TR, 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 STM32L052K6U6TR part is unused and in its original packaging.
Return procedure for STM32L052K6U6TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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