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STMicroelectronics STM32L052K8T7
- Part No.:
- STM32L052K8T7
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 32-LQFP
- Datasheet:
-
STM32L052K8T7.pdf
- Description:
- IC MCU 32BIT 64KB FLASH 32LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,553
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Product details
Overview
STM32L052K8T7 from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M0+ microcontroller featuring 64 KB Flash, 8 KB SRAM, 2 KB EEPROM with ECC, USB 2.0 (crystal-less), and a 12-bit ADC (1.14 Msps, 16 channels). It operates from 1.65–3.6 V across –40 to +125 °C and delivers 0.8 µA Stop mode + RTC + 8-KB RAM retention - ideal for battery-powered IoT sensors and portable medical devices.
For engineers reviewing the STM32L052K8T7 datasheet, STM32L052K8T7 pinout, STM32L052K8T7 application, or STM32L052K8T7 equivalent, key selection criteria include ultra-low-power mode timing (3.5 µs wakeup from RAM), integrated USB crystal-less PHY for space-constrained designs, and dual ultra-low-power comparators with wake-up capability down to 1.65 V.
Technical Context
The STM32L052K8T7 integrates an Arm Cortex-M0+ core with MPU, running up to 32 MHz using multiple clock sources: HSI16 (±1%), HSI48 (self-calibrated for USB), LSE (32 kHz RTC), and MSI (65 kHz–4.2 MHz). Its interconnect matrix enables concurrent peripheral operation without bus contention.
Power management includes five BOR thresholds, programmable voltage detector (PVD), and dynamic voltage scaling supporting three low-power run/sleep modes. The analog subsystem combines a 12-bit ADC (down to 1.65 V), single-channel 12-bit DAC (down to 1.8 V), and two comparators with window mode and independent wake-up capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Arm Cortex-M0+, 32 MHz max, 0.95 DMIPS/MHz - enables real-time control in energy-constrained firmware. |
| Memory | 64 KB Flash (ECC), 8 KB SRAM, 2 KB EEPROM (ECC) - supports robust firmware updates and nonvolatile parameter storage. |
| 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. |
| ADC | 12-bit, 1.14 Msps, 16 channels, operational down to 1.65 V - allows high-resolution sensing directly from low-voltage battery rails. |
| USB Interface | USB 2.0 full-speed, crystal-less, with battery charging detection - eliminates external crystal and reduces BOM cost/size. |
| DAC | 12-bit, 1 channel, buffered output, functional down to 1.8 V - provides precise analog output for calibration or biasing without external op-amps. |
| Comparators | 2x ultra-low-power comparators with window mode and wake-up - enables threshold monitoring and event-triggered wake from sub-µA states. |
Pinout & Package
STM32L052K8T7 uses the UFQFPN32 (5 × 5 mm) package with 32-pin layout optimized for compact PCBs and thermal efficiency in space-limited applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Supports 1.65–3.6 V operation; separate analog/digital domains enable noise isolation for ADC/DAC. |
| PA0–PA15, PB0–PB11 | General-purpose I/O | Up to 51 fast I/Os (45 tolerant to 5 V); configurable as GPIO, EXTI, or 24-capacitive-sensing channels. |
| PA2/PA3 | USART1 TX/RX | Support ISO 7816 smartcard interface and IrDA - suitable for secure access peripherals. |
| PA11/PA12 | USB D+/D− | Crystal-less USB 2.0 full-speed interface with built-in transceiver and battery charge detection logic. |
| PA4–PA7 | ADC IN1–IN4 | Four dedicated analog inputs with internal sampling; support single-ended or differential acquisition down to 1.65 V. |
| PA4 | DAC OUT1 | Buffered 12-bit DAC output usable for precision reference generation or sensor excitation. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power standby | 0.27 µA with 2 wakeup pins - enables long-term data logging with periodic sensor reads. |
| Crystal-less USB | HSI48 self-calibration against USB SOF packets - removes external 48 MHz crystal, saving board area and cost. |
| Embedded EEPROM | 2 KB with ECC and 100 k-cycle endurance - stores calibration coefficients or device-specific settings without external memory. |
| TSC controller | 24-channel capacitive sensing with touchkey/linear/rotary support - enables intuitive user interfaces in wearables and handhelds. |
| True RNG | Hardware entropy source compliant with NIST SP800-90B - strengthens cryptographic key generation in secure boot or OTA update flows. |
Applications
| Smart Wearable Sensor Node | Portable Medical Monitor |
|---|---|
Use Scenario: Continuous ECG or temperature monitoring powered by CR2032 coin cell. IC Role / Device Role / Timing Role: Main controller managing analog front-end, USB data upload, and ultra-low-power sleep/wake cycles. Use Value: 0.8 µA Stop + RTC + 8-KB RAM retention preserves session state while enabling hourly wake-ups for measurement - extending battery life beyond 2 years. | Use Scenario: Handheld blood glucose meter with touch interface and USB firmware update. IC Role / Device Role / Timing Role: System-on-chip handling sensor signal conditioning, capacitive touch UI, and crystal-less USB communication. Use Value: Integrated TSC supports 12-key touchpad; crystal-less USB eliminates timing component - reducing bill-of-materials and assembly complexity. |
| Industrial Wireless Sensor Transmitter | Energy Harvesting Node |
Use Scenario: LoRaWAN node harvesting ambient light, transmitting temperature/humidity every 15 minutes. IC Role / Device Role / Timing Role: Low-power host managing ADC acquisition, SPI flash logging, and UART-to-LoRa bridge. Use Value: 5 µs wakeup from Flash enables rapid sensor read-and-transmit sequences - minimizing active time and maximizing duty-cycle efficiency. | Use Scenario: Solar-powered environmental sensor using supercapacitor buffer and intermittent operation. IC Role / Device Role / Timing Role: Power-aware system manager coordinating energy harvesting, storage regulation, and burst-mode sensing. Use Value: Programmable voltage detector (PVD) triggers controlled shutdown at 1.75 V - preventing data corruption during brownout from variable input. |
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 |
|---|---|---|---|
| STM32L072K8T7 | 128 KB Flash, 20 KB SRAM, no USB, adds AES-128 and SHA-256 accelerators | Better suited for secure firmware updates and encrypted sensor data transmission | Select when cryptographic acceleration and larger code space outweigh USB requirement |
| STM32L432KCU6 | Cortex-M4F core, 256 KB Flash, 64 KB SRAM, USB, but higher active current (110 µA/MHz) | Higher performance for DSP-intensive tasks like FFT-based vibration analysis | Choose when floating-point computation or larger memory footprint is critical and power budget allows |
Compared with STM32L072K8T7, the STM32L052K8T7 trades Flash/SRAM capacity and crypto features for integrated USB and lower static current; versus STM32L432KCU6, it prioritizes sub-µA standby over computational throughput - making it optimal for infrequent-event, battery-limited edge nodes.
Availability
STM32L052K8T7 is available at Aetrix Electronics and suitable for battery-powered IoT sensors, portable medical monitors, industrial wireless transmitters, and energy-harvesting nodes requiring stable component supply across extended product lifecycles.
Supply support for STM32L052K8T7 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 ICs, sensors, and analog components for industrial, automotive, and consumer markets.
The STM32L0 series targets ultra-low-power embedded applications, emphasizing sub-µA standby operation, integrated peripherals for sensor fusion, and robustness across extended temperature and voltage ranges - specifically engineered for battery-operated edge devices.
FAQ
What is the maximum operating frequency and core type of the STM32L052K8T7?
The STM32L052K8T7 features an Arm Cortex-M0+ core rated for up to 32 MHz operation. It achieves 0.95 DMIPS/MHz and includes a Memory Protection Unit (MPU) for secure task isolation. The core supports Thumb-2 instruction set and operates across the full 1.65–3.6 V supply range without frequency derating.
Does the STM32L052K8T7 support USB without an external crystal?
Yes - the STM32L052K8T7 integrates a crystal-less USB 2.0 full-speed PHY with HSI48 oscillator self-calibration against USB Start-of-Frame (SOF) packets. This eliminates the need for an external 48 MHz crystal or oscillator, reducing BOM count and PCB area while maintaining ±0.25% USB timing accuracy.
How many I/O pins are 5 V tolerant on the STM32L052K8T7?
45 of the 51 general-purpose I/Os on the STM32L052K8T7 are 5 V tolerant when configured in input, output, or alternate function mode - provided VDD is ≥ 2.0 V. This allows direct interfacing with legacy 5 V logic, sensors, or displays without level-shifting circuitry.
What is the minimum supply voltage required for the ADC and DAC to operate?
The 12-bit ADC functions down to 1.65 V supply, maintaining full 12-bit linearity and 1.14 Msps sampling rate. The 12-bit DAC operates down to 1.8 V with buffered output - enabling analog signal generation even under deep battery discharge conditions typical in coin-cell applications.
STM32L052K8T7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 32-LQFP
- 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 ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32L052K8T7 FAQ
1.How can I place an order for STM32L052K8T7 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L052K8T7 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 STM32L052K8T7 reliable?
The price and inventory of STM32L052K8T7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L052K8T7 is usually 5 days.
3.What payment methods are accepted for STM32L052K8T7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L052K8T7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L052K8T7?
STM32L052K8T7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L052K8T7 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 STM32L052K8T7?
For technical support, including STM32L052K8T7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L052K8T7 requirements.
6.How does Aetrix verify that STM32L052K8T7 is sourced from the original manufacturer or authorized distributors?
All STM32L052K8T7 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 STM32L052K8T7 meets industry standards.
7.What is the process for return or replacement of STM32L052K8T7?
All STM32L052K8T7 units undergo pre-shipment inspection (PSI). If there is an issue with STM32L052K8T7, 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 STM32L052K8T7 part is unused and in its original packaging.
Return procedure for STM32L052K8T7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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