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HomeProductsIntegrated Circuits (ICs)Embedded - MicrocontrollersSTM32L052K8T6
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STM32L052K8T6 - STMicroelectronics

Manufacturer Part Number
STM32L052K8T6
Manufacturer
STMicroelectronics
Allelco Part Number
32D-STM32L052K8T6
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
12,424 pcs available, New & Original
Parts Description
IC MCU 32BIT 64KB FLASH 32LQFP
Package
32-LQFP (7x7)
Data sheet
STM32L052K8T6.pdf

PCN Assembly/Origin

STM8/STM32 10/Mar/2020.pdf
RoHs Status
ROHS3 Compliant
Compare
Our certification
In stock: 12424
  • Unit Price: $3.331
  • Subtotal: $0.00

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Add to Cart and Submit RFQ now, we'll contact you immediately.

Quantity Unit Price Ext. Price
1+ $3.331 $3.33
10+ $2.923 $29.23
30+ $2.673 $80.19
100+ $2.465 $246.50
The above prices does not include taxes and freight rates, which will be calculated on the order pages.

Specifications

STM32L052K8T6 Tech Specifications
STMicroelectronics - STM32L052K8T6 technical specifications, attributes, parameters and parts with similar specifications to STMicroelectronics - STM32L052K8T6

Product Attribute Attribute Value
Manufacturer STMicroelectronics
Voltage - Supply (Vcc/Vdd) 1.65V ~ 3.6V
Supplier Device Package 32-LQFP (7x7)
Speed 32MHz
Series STM32L0
RAM Size 8K x 8
Program Memory Type FLASH
Program Memory Size 64KB (64K x 8)
Peripherals Brown-out Detect/Reset, DMA, POR, PWM, WDT
Package / Case 32-LQFP
Package Tray
Product Attribute Attribute Value
Oscillator Type Internal
Operating Temperature -40°C ~ 85°C (TA)
Number of I/O 27
Mounting Type Surface Mount
EEPROM Size 2K x 8
Data Converters A/D 10x12b; D/A 1x12b
Core Size 32-Bit Single-Core
Core Processor ARM® Cortex®-M0+
Connectivity I²C, IrDA, SPI, UART/USART, USB
Base Product Number STM32L052

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status ROHS3 Compliant
Moisture Sensitivity Level (MSL) 3 (168 Hours)
REACH Status REACH Unaffected
ECCN 3A991A2
HTSUS 8542.31.0001

Parts Introduction

STM32L052K8T6 Image
STM32L052K8T6 (1)

Manufacturer Part Number

STM32L052K8T6

Manufacturer

STMicroelectronics

STM32L052K8T6 Image
STM32L052K8T6 (2)

Introduction

32-Bit ARM Cortex-M0+ Microcontroller for Low-Power Applications

Product Features and Performance

32-Bit Single-Core ARM Cortex-M0+ Processor

32MHz Maximum Operating Frequency

High-Performance Data Transfers with DMA

Built-in Programmable Watchdog Timer and PWM

Serial Communication Interfaces I2C, SPI, UART/USART, USB

STM32L052K8T6 Image
STM32L052K8T6 (3)

Product Advantages

Low-Power Operation Suitable for Battery-Operated Devices

Large On-Chip FLASH and RAM for Complex Applications

EEPROM for Non-Volatile Memory Storage

Robust Operating Temperature Range

Key Technical Parameters

Core Speed: 32MHz

Program Memory: 64KB FLASH

RAM: 8KB

EEPROM: 2KB

I/O Count: 27

Analog-to-Digital Converter: 10x12-bit

Digital-to-Analog Converter: 1x12-bit

STM32L052K8T6 Image
STM32L052K8T6 (4)

Quality and Safety Features

Brown-out Detect/Reset

Power-on Reset

Supply Voltage: 1.65V to 3.6V for Flexible Battery Use

Compatibility

Wide Range of Serial and Analog Interfaces for Broad Device Compatibility

STM32L052K8T6 Image
STM32L052K8T6 (5)

Application Areas

IoT Devices

Low-Power Sensor Hubs

Wearable Electronics

Portable Medical Equipment

Product Lifecycle

Active Product Status

Continued Manufacturer Support with Replacements Available

Several Key Reasons to Choose This Product

Optimized for Energy Efficiency, Extending Battery Life in Portable Devices

High Integration Reduces External Component Count and System Cost

Robust Peripheral Set Supports Complex Applications and Reduces BOM

STM32 Ecosystem Support for Easy Development and Prototyping

Competitive Pricing and Durability for Consumer and Industrial Markets

Frequently Asked Questions(FAQ)

What is the optimal operating voltage range and how does it impact power-sensitive applications using the STM32L052K8T6 microcontroller?
The STM32L052K8T6 operates reliably within a supply voltage range of 1.65V to 3.6V, making it suitable for battery-powered and energy-constrained systems. This extended low-voltage capability allows integration into devices with single-cell lithium or alkaline batteries without requiring boost converters. However, at the lower end of this range, clock speeds may need to be reduced to maintain stability, particularly when using internal oscillators. Designers should account for I/O pin leakage currents and ADC linearity degradation near the minimum voltage threshold.
How does the STM32L052K8T6 compare to other STM32L0 series microcontrollers in terms of memory footprint and peripheral availability for cost-sensitive embedded designs?
Compared to higher-end variants like the STM32L072 (which offers up to 192KB flash), the STM32L052K8T6 provides a more compact solution with 64KB flash and 8KB RAM, reducing BOM cost and board real estate. While it lacks advanced peripherals such as hardware cryptographic engines present in STM32L07x models, it retains essential connectivity including USB, UART, SPI, I2C, and IrDA. For applications requiring only basic sensor interfacing and moderate data logging, this trade-off results in a highly efficient balance between functionality and resource usage.
Can the STM32L052K8T6 support USB communication in full-speed mode, and what are the design considerations for implementing USB on a 3.2-bit Cortex-M0+ core?
Yes, the STM32L052K8T6 supports USB 2.0 full-speed communication via its integrated USB peripheral. However, due to the Cortex-M0+ architecture lacking native floating-point or DSP instructions, complex USB protocol handling must be implemented in firmware using efficient bit-banging or optimized library routines. Additionally, precise external 16MHz crystal or ceramic resonator is required for accurate USB clocking, increasing PCB layout complexity compared to internal RC oscillator-based designs.
What is the significance of the Moisture Sensitivity Level (MSL) rating of 3 for the STM32L052K8T6, and how should it influence manufacturing process planning?
With an MSL of 3, the STM32L052K8T6 must be assembled within 168 hours of exposure to ambient humidity after dry-pack removal. Exceeding this window requires baking before reflow soldering to prevent popcorning during thermal cycling. This constraint necessitates careful inventory management and just-in-time delivery coordination between procurement and production teams to avoid yield losses associated with moisture-induced defects.
How does the internal oscillator accuracy affect timing-critical applications when using the STM32L052K8T6 without an external crystal?
The internal high-speed oscillator of the STM32L052K8T6 has typical accuracy of ±2% over temperature and voltage variations, which may be insufficient for applications requiring sub-millisecond timing precision such as motor control or RF synchronization. In such cases, an external 4–32MHz crystal must be used with dedicated load capacitors. Alternatively, calibration routines can trim the internal oscillator but still fall short of crystal-grade precision, impacting long-term reliability in time-sensitive tasks.
What are the implications of the 10-channel 12-bit ADC on the STM32L052K8T6 for analog sensor interfacing in industrial monitoring systems?
The STM32L052K8T6 features a 12-bit successive approximation ADC with 10 multiplexed channels, providing sufficient resolution for most low-to-medium precision analog measurements such as temperature, pressure, or current sensing. However, effective resolution is often limited to ~10 bits due to noise and reference instability at low supply voltages. To maximize performance, designers should implement oversampling averaging and ensure stable VREF+ connections, preferably derived from a dedicated precision voltage source rather than VDD.
Is there a difference in interrupt latency between edge-triggered and level-sensitive inputs on the STM32L052K8T6, and how does this affect real-time response in safety-critical applications?
On the STM32L052K8T6, both edge- and level-sensitive interrupts share similar worst-case latencies of approximately 12 clock cycles (about 375ns at 32MHz). However, level-sensitive modes require continuous polling in software to avoid missing transitions, introducing additional overhead. For deterministic responses, edge-triggered interrupts are preferred, though debouncing logic must be implemented externally or carefully managed in firmware to prevent false triggers from mechanical switches.
How should the brown-out detection (BOD) thresholds be configured on the STM32L052K8T6 to ensure safe operation during power-up and brownout conditions?
The STM32L052K8T6 offers configurable BOD thresholds typically set at 2.1V, 2.4V, or 2.7V depending on the specific configuration register settings. For systems powered by unstable sources, selecting the lowest practical threshold ensures reset during minor dips while avoiding nuisance resets. During startup, the device automatically initializes with factory-calibrated BOD levels, but software can override these post-boot for application-specific tuning—critical in battery-operated devices where sudden current draw causes temporary voltage sag.
What are the key differences between using DMA versus CPU-driven data transfers with peripherals like SPI on the STM32L052K8T6, especially under low-power constraints?
Utilizing DMA on the STM32L052K8T6 offloads the CPU from repetitive data-handling tasks, enabling deeper sleep states between transfers and significantly reducing overall power consumption. Unlike CPU-managed transfers that keep the core active, DMA allows peripherals to operate autonomously, waking the processor only upon completion. This is particularly advantageous for continuous sensor data acquisition over SPI or I²C, where frequent wake-sleep cycles extend battery life by minimizing active time.
How does the absence of an on-chip DAC impact signal generation capabilities when using the STM32L052K8T6 for waveform output in audio or PWM-based applications?
Although the STM32L052K8T6 includes a 12-bit DAC, its output bandwidth (~100ksps) limits direct use for high-fidelity audio synthesis. Instead, pulse-width modulation (PWM) driven through GPIO pins combined with passive filtering can approximate analog outputs for simple waveforms. However, this approach consumes more CPU resources and introduces ripple, whereas true analog output demands either external DACs or higher-performance MCUs—making the STM32L052K8T6 better suited for digital or sampled-data applications.
What precautions must be taken during PCB layout to ensure reliable operation of the STM32L052K8T6 in harsh environments with rapid temperature changes?
Given the operating temperature range of -40°C to 85°C, the STM32L052K8T6 requires careful decoupling capacitor placement near VDD/VSS pins to suppress transient noise. Thermal vias under the LQFP package help dissipate heat during peak current draws, while keeping traces short minimizes parasitic inductance. Additionally, grounding strategies should isolate analog and digital domains to prevent ground bounce, especially critical when running USB communications alongside switching loads.
Why might developers choose the STM32L052K8T6 over ARM Cortex-M0+ alternatives from other manufacturers despite similar core specifications?
Beyond raw performance, the STM32L052K8T6 benefits from STMicroelectronics’ extensive ecosystem including HAL libraries, CubeMX tools, and comprehensive errata documentation. Its proven USB implementation, robust low-power modes (down to 0.1µA in shutdown), and mature production status offer greater design confidence than newer entrants. Furthermore, the unified pin compatibility across STM32L0 family simplifies future scalability without redesigning PCBs.
How does the EEPROM emulation feature work in the STM32L052K8T6, and what is the expected endurance for non-volatile parameter storage?
The STM32L052K8T6 emulates 2KB of EEPROM using flash memory sectors, allowing byte-level writes without dedicated hardware. However, flash endurance is rated for ~10,000 erase/write cycles per sector. Therefore, wear leveling algorithms must be implemented in firmware to distribute write operations evenly across blocks, extending usable lifetime beyond the bare minimum—especially important for devices logging configuration changes frequently.
What are the risks of using the STM32L052K8T6’s internal regulator in high-current scenarios, and how does this affect system-level power budgeting?
The integrated linear regulator on the STM32L052K8T6 delivers up to 100mA, but exhibits efficiency drops below ~85% at higher loads due to dropout voltage. Combined with quiescent current draw, this increases total system power consumption, reducing battery runtime. For applications drawing >50mA continuously, external regulators or direct battery connection (bypassing the chip’s regulator) may be necessary to optimize efficiency and thermal performance.
How can the watchdog timers (IWDG and WWDG) on the STM32L052K8T6 improve reliability in field-deployed embedded systems prone to software hangs?
The independent watchdog (IWDG) runs from an internal RC oscillator and resets the MCU if not periodically refreshed, protecting against software lockups even if the main clock fails. Meanwhile, the windowed watchdog (WWDG) offers finer granularity by enforcing refresh windows, catching errant code that refreshes too early or late. Together, they provide layered fault tolerance, though proper initialization sequences and secure key access must be followed to prevent accidental resets during normal operation.
What considerations apply when bootloading firmware onto the STM32L052K8T6 via USB, given its lack of built-in DFU bootloader support?
Since the STM32L052K8T6 does not include a pre-programmed USB DFU bootloader, custom bootloaders must be developed and flashed separately—typically using ST-LINK or JTAG interfaces. This adds development overhead but allows tailored update protocols. Alternatively, users can leverage STM32CubeProgrammer or open-source tools like pyOCD, provided the initial boot mode pins are correctly configured to enter system memory boot mode during reset.
How does the package size of the 32-LQFP (7x7) affect thermal dissipation and routing density when integrating the STM32L052K8T6 into compact consumer electronics?
The compact 7x7mm LQFP package enables high component density but presents thermal challenges due to limited exposed pad area. Without proper copper pour and thermal relief, junction temperatures can rise significantly during sustained USB or ADC operations. Route high-speed signals away from the package edges, minimize stub lengths, and consider adding solder mask-defined pads beneath the part to enhance heat spreading without risking solder wicking during reflow.
In what scenarios would the STM32L052K8T6 be unsuitable despite its low-power advantages, and what alternative architectures should be considered instead?
The STM32L052K8T6 becomes impractical for applications requiring >128KB flash, multiple high-speed ADCs, or real-time operating systems with rich middleware. Additionally, projects demanding sub-μA sleep currents (<0.5µA) may benefit from newer ultra-low-power families like the STM32U5, which integrate dynamic voltage scaling and improved analog performance. Similarly, if cryptographic acceleration or CAN bus support is essential, stepping up to STM32G0 or STM32WL series may provide better alignment with functional requirements.

Parts with Similar Specifications

The three parts on the right have similar specifications to STMicroelectronics STM32L052K8T6

Product Attribute STM32L052K8T6TR STM32L052K8T6D STM32L052K8T7 STM32L052C8T6TR
Part Number STM32L052K8T6TR STM32L052K8T6D STM32L052K8T7 STM32L052C8T6TR
Manufacturer STMicroelectronics STMicroelectronics STMicroelectronics STMicroelectronics
Voltage - Supply (Vcc/Vdd) - - - -
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
RAM Size - - - -
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Program Memory Type - - - -
Series - - - -
Mounting Type - Surface Mount Through Hole Surface Mount
Base Product Number - DAC34H84 MAX500 ADS62P42
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Core Processor - - - -
Core Size - - - -
Speed - - - -
EEPROM Size - - - -
Connectivity - - - -
Peripherals - - - -
Program Memory Size - - - -
Data Converters - - - -
Number of I/O - - - -
Oscillator Type - - - -
Supplier Device Package - 196-NFBGA (12x12) 16-PDIP 64-VQFN (9x9)

STM32L052K8T6 Datasheet PDF

Download STM32L052K8T6 pdf datasheets and STMicroelectronics documentation for STM32L052K8T6 - STMicroelectronics.

PCN Design/Specification
Datasheet Chg 07/Mar/2016.pdf MMS/15/9201 27/Apr/2015.pdf
PCN Packaging
Material Barrier Bag 17/Dec/2020.pdf
HTML Datasheet
STM32L0 Series Programming Manual.pdf STM32L052x6, x8 Datasheet.pdf
PCN Assembly/Origin
STM8/STM32 10/Mar/2020.pdf

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Customer Reviews

Evaluation: 10 Articles

  • Dani***alkerTech
    Jun 1, 2026

    Product works, but setup took more effort than expected. Once configured the MCU ran reliably, although documentation support felt older compared with newer platforms. Fine for maintenance projects.

  • Yuki***aka88
    May 26, 2026

    信号通信プロジェクトでこのRS-485トランシーバーを使用しました。設置は簡単で、長距離ケーブルでも通信は安定していました。消費電力も、以前使用していたものより低くなっています。

  • Stev***aker
    May 20, 2026

    Solid diode for power rectification. Works well in switching circuits.

  • Bran***Lewis
    May 11, 2026

    Compact FPGA with good performance. Suitable for basic signal processing tasks.

  • Oliv***arris
    May 7, 2026

    Reliable I/O expander. Works well in embedded control applications.

  • Jess***Jones
    Apr 17, 2026

    It offers good value for the price, and the specifications match the description. I’ve been using it for two days with no issues, and I’ll definitely buy it again if I need it in the future.

  • Mich***Smith
    Apr 17, 2026

    Shipping was on time, the component pins are neatly aligned, and I tested 10 of them with a multimeter—all readings were within the specified range. Highly recommended.

  • Aman***arris
    Apr 3, 2026

    It was great—the entire process, from placing the order to receiving the package, went very smoothly. The components were consistent, the price was fair, and I had a very pleasant shopping experience.

  • Mike***nch
    Apr 3, 2026

    Better than expected! The resistance and capacitance readings were spot-on, and it passed the test on the first try. The service was reliable, and the packaging was thoughtful—I highly recommend it.

  • Daic***K.
    Mar 23, 2026

    Very good. No issue after long time testing.

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Shipment

Delivery Time

In-stock items can be shipped within 24 hours. Some parts will be arranged for delivery within 1-2 days from the date all items arrive at our warehouse. And Allelco ships order once a day at about 17:00, except Sunday. Once the goods are shipped, the estimated delivery time depends on the shipping methods and Delivery destination. The table below shows are the logistic time for some common countries.

Delivery Cost

  1. Use your express account for shipment if you have one.
  2. Use our account for the shipment. Refer to the table below for the approximate charges.
(Different time frame / countries / package size has different price.)

Delivery Method

  1. Global Common Shipment by DHL / UPS / FedEx / TNT / EMS / SF we support.
  2. Others more shipping ways, please get in touch with your customer manager.

Common Countries Logistic Time Reference
Region Country Logistic Time(Day)
America United States 5
Brazil 7
Europe Germany 5
United Kingdom 4
Italy 5
Oceania Australia 6
New Zealand 5
Asia India 4
Japan 4
Middle East Israel 6
DHL & FedEx Shipment Charges Reference
Shipment charges(KG) Reference DHL(USD$)
0.00kg-1.00kg USD$30.00 - USD$60.00
1.00kg-2.00kg USD$40.00 - USD$80.00
2.00kg-3.00kg USD$50.00 - USD$100.00
Note:
The above table is for reference only. There may have some data bias for the uncontrollable factors.
Contact us if you have any questions.
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Allelco is committed to exceeding customer expectations through customer service excellence, order accuracy, and on-time delivery.
This is achieved through our commitment to the continual improvement of our processes, services, and products.


Strict quality inspection builds a solid foundation for electronic component quality.
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We eliminate defective components and ensure the stable operation of electronic devices through professional quality standards.
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Packaging

Electrostatic Discharge Protection and Handling

All electrostatic-sensitive components are handled in accordance with electrostatic discharge control procedures. The products are hermetically sealed in anti-static safe packaging to prevent electrostatic damage. Appropriate labeling is also applied for identification and traceability. This ensures product integrity during storage, handling and transportation.


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Certifications & Memberships

Third-party certified, strict quality control. Our certification
  • ISO 9001: 2015
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STM32L052K8T6 Image

STM32L052K8T6

STMicroelectronics
32D-STM32L052K8T6

Want a better price? Add to Cart and Submit RFQ now, we'll contact you immediately.

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