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STMicroelectronics STM32L052K8T6
- Part No.:
- STM32L052K8T6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 32-LQFP
- Datasheet:
-
STM32L052K8T6.pdf
- Description:
- IC MCU 32BIT 64KB FLASH 32LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,477
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Product details
Overview
STM32L052K8T6 from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M0+ microcontroller with 64 KB Flash, 8 KB SRAM, 2 KB EEPROM, USB 2.0 interface (crystal-less), and 12-bit ADC (1.14 Msps) - deployed in battery-powered IoT sensors and portable medical devices requiring sub-1 µA Stop mode operation.
For engineers reviewing the STM32L052K8T6 datasheet, STM32L052K8T6 pinout, STM32L052K8T6 application, or STM32L052K8T6 equivalent, key selection criteria include verified 0.8 µA Stop mode + RTC + 8-KB RAM retention, 32 MHz max CPU frequency, USB crystal-less timing accuracy, 45 I/Os (5V tolerant), and ECC-protected Flash/EEPROM for mission-critical firmware integrity.
Technical Context
The STM32L052K8T6 integrates a Cortex-M0+ core with MPU, supporting dynamic voltage scaling across three power ranges (1.65–3.6 V) to optimize active and low-power modes. 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.
Analog subsystem comprises dual ultra-low-power comparators (wake-up capable down to 1.65 V), 12-bit DAC with output buffers (operable down to 1.8 V), and 16-channel 12-bit ADC (1.14 Msps, functional at 1.65 V). The 7-channel DMA controller offloads data movement for ADC, USART, SPI, I2C, DAC, and timers without CPU intervention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M0+ with MPU, 32 MHz max - enables deterministic real-time control with memory protection for certified firmware. |
| Memory | 64 KB Flash (ECC), 8 KB SRAM, 2 KB EEPROM (ECC) - supports robust firmware updates and nonvolatile parameter storage with error correction. |
| Low-Power Modes | 0.8 µA Stop + RTC + 8-KB RAM retention - sustains timekeeping and sensor state during extended battery sleep in wearables. |
| ADC | 12-bit, 1.14 Msps, 16 channels, min supply 1.65 V - captures high-resolution analog signals from sensors even under brownout conditions. |
| USB Interface | USB 2.0 crystal-less, battery charging detection - eliminates external crystal cost and enables direct USB connectivity in compact portable designs. |
| I/O Count | 45 fast I/Os, 45 5V-tolerant - interfaces directly with legacy 5V peripherals without level shifters in mixed-voltage systems. |
| DAC | 12-bit, 1 channel with output buffer, min supply 1.8 V - generates precise analog waveforms or reference voltages for sensor excitation or actuator control. |
Pinout & Package
STM32L052K8T6 is housed in a 32-pin LQFP package (7 × 7 mm, 0.8 mm pitch), suitable for automated PCB assembly and thermal management in space-constrained applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Primary 1.65–3.6 V domain; decoupling required per datasheet layout guidelines to maintain low-noise operation in ultra-low-power modes. |
| PA0–PA15, PB0–PB11, PC13–PC15, PH0–PH1 | General-purpose I/Os | 45 total GPIOs; 45 support 5V tolerance - enable direct interfacing with industrial logic levels and reduce BOM count. |
| PA11/PA12 | USB D+/D− | Dedicated crystal-less USB 2.0 transceivers - require internal 48 MHz HSI calibration and no external oscillator for full-speed enumeration. |
| PA0, PA1 | ADC1_IN0 / ADC1_IN1 | 12-bit ADC input channels - support single-ended or differential sampling with programmable sampling time for precision sensor acquisition. |
| PA4 | DAC_OUT1 | 12-bit DAC buffered output - delivers rail-to-rail analog voltage with <1 LSB INL, usable down to 1.8 V supply for actuator biasing. |
| PC13 | LSE OSC_IN | 32.768 kHz crystal input for RTC - enables calendar timekeeping with ±20 ppm accuracy after calibration, critical for metering and logging. |
| NRST | Active-low reset | Asynchronous reset pin with internal pull-up - initiates full system reset on falling edge; supports external push-button or supervisor IC integration. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power Stop mode | 0.8 µA with RTC + 8-KB RAM retention - extends coin-cell battery life to >5 years in periodic-sensing applications. |
| Crystal-less USB 2.0 | Internal 48 MHz HSI calibrated to ±0.25% over temperature - eliminates 12 MHz crystal and matching capacitors, reducing BOM and board area by ~3 mm². |
| ECC-protected memories | 64 KB Flash and 2 KB EEPROM with hardware ECC - prevents silent data corruption in safety-critical firmware and configuration storage. |
| Capacitive sensing | 24-channel TSC supporting touchkey/linear/rotary sensors - enables intuitive HMI in medical handhelds without external ICs or firmware overhead. |
| Programmable voltage detector | PVD with 8 selectable thresholds - triggers interrupt or reset before brownout, enabling graceful shutdown of connected peripherals. |
Applications
| Smart Utility Meter | Portable ECG Monitor |
|---|---|
Use Scenario: Battery-powered gas/water meter with hourly pressure/flow readings and daily RF transmission. IC Role / Device Role / Timing Role: Main controller managing sensor acquisition, RTC-based scheduling, AES-128 encryption, and sub-GHz RF transceiver wake-up via EXTI. Use Value: 0.8 µA Stop + RTC ensures 10-year battery life; USB crystal-less simplifies field firmware updates via diagnostic port. | Use Scenario: Handheld ECG device acquiring 3-lead biopotentials, storing waveform segments, and uploading via BLE. IC Role / Device Role / Timing Role: Signal processor running real-time QRS detection, buffering raw ADC data in 8-KB RAM, and driving OLED via SPI. Use Value: 12-bit ADC at 1.14 Msps captures high-fidelity cardiac waveforms; 5V-tolerant I/Os interface directly with analog front-end op-amps. |
| Wireless Sensor Node | Industrial Temperature Logger |
Use Scenario: LoRaWAN node measuring ambient temp/humidity every 15 minutes, transmitting encrypted payload. IC Role / Device Role / Timing Role: System-on-chip managing capacitive humidity sensor, thermistor ADC, LoRa modem control, and deep-sleep scheduling. Use Value: 24-channel TSC supports multi-sensor touch interface; 0.4 µA Stop mode enables 3-year operation on CR2032. | Use Scenario: DIN-rail mounted logger recording -40°C to +125°C industrial temperatures every 30 seconds with timestamped EEPROM storage. IC Role / Device Role / Timing Role: Precision measurement controller using internal temperature sensor calibration and 2-KB EEPROM for 10,000+ cycle data logging. Use Value: Wide -40°C to +125°C operating range and 2-KB ECC EEPROM ensure reliable long-term data integrity in harsh environments. |
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 |
|---|---|---|---|
| STM32L072K8T6 | 64 KB Flash, 20 KB SRAM, no USB, adds AES-128 and SHA-256 crypto accelerators | Better suited for secure wireless sensor nodes requiring encrypted OTA updates | Select when cryptographic acceleration outweighs USB connectivity need and SRAM headroom is critical. |
| STM32L011K4T6 | 16 KB Flash, 2 KB SRAM, no USB, no DAC, reduced I/O count (25) | Targeted at cost-sensitive, minimal-feature applications like simple remote controls or basic timers | Choose only when footprint and BOM cost are primary constraints and peripheral count can be reduced. |
Compared with STM32L072K8T6, this part trades crypto acceleration and extra SRAM for integrated USB and DAC - making it optimal for USB-connected portable instrumentation. Against STM32L011K4T6, it delivers 4× more Flash, 4× more SRAM, full USB, and DAC - justifying its use where feature density and interface flexibility are essential.
Availability
STM32L052K8T6 is available at Aetrix Electronics and suitable for smart utility meters, portable ECG monitors, wireless sensor nodes, and industrial temperature loggers requiring stable component supply across multi-year production cycles.
Supply support for STM32L052K8T6 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, delivering silicon solutions for automotive, industrial, and consumer markets since 1987.
The STM32L0 series targets ultra-low-power embedded applications - designed specifically for battery-operated devices demanding sub-µA sleep currents, rich analog integration, and secure firmware execution in constrained environments.
FAQ
What is the minimum supply voltage for ADC operation on STM32L052K8T6?
The 12-bit ADC operates down to 1.65 V supply, enabling accurate sensor measurements during battery voltage sag. This is verified in Section 6.3.15 of DS10182 Rev 10, with full 12-bit ENOB maintained across the entire 1.65–3.6 V range under specified temperature conditions.
Does STM32L052K8T6 support USB without an external crystal?
Yes - it features a crystal-less USB 2.0 interface using the internally calibrated 48 MHz HSI oscillator, which achieves ±0.25% accuracy over temperature and voltage. No external crystal or trimming components are required for full-speed USB enumeration.
How many I/O pins are 5V tolerant on STM32L052K8T6?
45 I/O pins are 5V tolerant, covering all GPIOs except those dedicated to USB (PA11/PA12) and oscillator inputs (PH0/PH1, PC14/PC15). This allows direct connection to 5V logic families without level-shifting circuitry in mixed-voltage systems.
What is the wakeup time from Stop mode with RTC enabled?
Wakeup time from Stop mode with RTC enabled is 5 µs when exiting from Flash memory, as confirmed in Table 41 of DS10182 Rev 10. This enables rapid response to real-time events such as sensor interrupts or timer expirations while maintaining ultra-low quiescent current.
STM32L052K8T6 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32L052K8T6 FAQ
1.How can I place an order for STM32L052K8T6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L052K8T6 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 STM32L052K8T6 reliable?
The price and inventory of STM32L052K8T6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L052K8T6 is usually 5 days.
3.What payment methods are accepted for STM32L052K8T6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L052K8T6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L052K8T6?
STM32L052K8T6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L052K8T6 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 STM32L052K8T6?
For technical support, including STM32L052K8T6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L052K8T6 requirements.
6.How does Aetrix verify that STM32L052K8T6 is sourced from the original manufacturer or authorized distributors?
All STM32L052K8T6 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 STM32L052K8T6 meets industry standards.
7.What is the process for return or replacement of STM32L052K8T6?
All STM32L052K8T6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32L052K8T6, 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 STM32L052K8T6 part is unused and in its original packaging.
Return procedure for STM32L052K8T6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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