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Home Products Integrated Circuits (ICs)Embedded - Microcontrollers~~STM32L442KCU6TR~~

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STM32L442KCU6TR - STMicroelectronics

Name: STMicroelectronics STM32L442KCU6TR
Brand: STMicroelectronics
SKU: STM32L442KCU6TR
Availability: InStock
Rating: 5 (2 reviews)

Manufacturer Part Number: STM32L442KCU6TR

Manufacturer: STMicroelectronics

Allelco Part Number: 32D-STM32L442KCU6TR

Warranty: 1 Year Allelco Warranty - Find out more

Stock Status:: 11,164 pcs available, New & Original

Parts Description: IC MCU 32BIT 256KB FLSH 32UFQFPN

Package: 32-UFQFPN (5x5)

Data sheet: STM32L442KCU6TR.pdf

Datasheets
STM32L442KC.pdf

PCN Packaging
Material Barrier Bag 17/Dec/2020.pdf

PCN Assembly/Origin
Multi Dev 21/Sep/2022.pdf

RoHs Status: ROHS3 Compliant

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In stock: 11164

Specifications

STM32L442KCU6TR Tech Specifications
STMicroelectronics - STM32L442KCU6TR technical specifications, attributes, parameters and parts with similar specifications to STMicroelectronics - STM32L442KCU6TR

Product Attribute	Attribute Value
Manufacturer	STMicroelectronics
Voltage - Supply (Vcc/Vdd)	1.71V ~ 3.6V
Supplier Device Package	32-UFQFPN (5x5)
Speed	80MHz
Series	STM32L4
RAM Size	64K x 8
Program Memory Type	FLASH
Program Memory Size	256KB (256K x 8)
Peripherals	Brown-out Detect/Reset, DMA, PWM, WDT
Package / Case	32-UFQFN Exposed Pad
Package	Tape & Reel (TR)

Product Attribute	Attribute Value
Oscillator Type	Internal
Operating Temperature	-40°C ~ 85°C (TA)
Number of I/O	26
Mounting Type	Surface Mount
EEPROM Size	-
Data Converters	A/D 10x12b
Core Size	32-Bit Single-Core
Core Processor	ARM® Cortex®-M4
Connectivity	CANbus, I²C, IrDA, LINbus, QSPI, SAI, SPI, SWPMI, UART/USART, USB
Base Product Number	STM32L442

Environmental & Export Classifications

ATTRIBUTE	DESCRIPTION
RoHs Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)
REACH Status	REACH Unaffected
HTSUS	0000.00.0000

Parts Introduction

STM32L442KCU6TR (1)

Manufacturer Part Number

STM32L442KCU6TR

Manufacturer

stmicroelectronics

Introduction

The STM32L442KCU6TR is a highly versatile 32-bit ARM® Cortex®-M4 microcontroller from STMicroelectronics. This device offers a robust set of peripherals, advanced power management capabilities, and exceptional performance, making it an ideal choice for a wide range of embedded applications.

Product Features and Performance

32-bit ARM Cortex-M4 core running at 80MHz

256KB of FLASH memory and 64KB of RAM

Integrated peripherals including CAN bus, I2C, IrDA, LIN bus, QSPI, SAI, SPI, SWPMI, UART/USART, and USB

Advanced power management features with low-power modes

10x 12-bit analog-to-digital converters (ADCs)

Brown-out detection and reset, DMA, PWM, and watchdog timer (WDT)

26 general-purpose I/O pins

Product Advantages

Excellent performance-to-power ratio for energy-efficient applications

Comprehensive set of communication and control peripherals

Flexible power management options for optimizing power consumption

Robust safety and security features for reliable operation

Key Reasons to Choose This Product

High-performance 32-bit ARM Cortex-M4 core for demanding applications

Extensive peripheral set for versatile connectivity and control

Low-power modes for extended battery life in portable devices

Reliable and secure operation with advanced safety features

Cost-effective solution for a wide range of embedded systems

Quality and Safety Features

Industrial-grade temperature range of -40°C to 85°C

Rigorous quality control and testing processes

Compliance with relevant industry standards and certifications

Compatibility

The STM32L442KCU6TR is compatible with a wide range of development tools, software libraries, and ecosystem support from STMicroelectronics and the broader ARM Cortex-M4 community.

Application Areas

Industrial automation and control systems

Smart home and building automation

Wearable and portable electronics

Medical devices and healthcare equipment

Automotive and transportation systems

Robotics and IoT applications

Product Lifecycle

The STM32L442KCU6TR is an active product in our website's sales team's portfolio. There are several alternative and equivalent models available, including the STM32L433, STM32L476, and STM32L4A6 series. Customers are advised to contact our website's sales team for the most up-to-date information on product availability and potential replacement options.

Frequently Asked Questions(FAQ)

How does the STM32L442KCU6TR compare to other STM32L4 series microcontrollers in terms of power efficiency and clock speed, particularly when targeting battery-powered IoT edge devices?: The STM32L442KCU6TR operates at 80MHz with a core voltage range of 1.71V to 3.6V, delivering a balance between performance and power consumption suitable for low-power applications. Compared to higher-end STM32L4 variants such as the STM32L476, which also feature the Cortex-M4 but may offer more advanced peripherals or larger memory, the STM32L442KCU6TR is optimized for cost-sensitive designs where moderate processing needs and ultra-low-power modes are prioritized. Its 256KB flash and 64KB RAM provide sufficient resources for many embedded control tasks without over-provisioning, reducing die size and leakage current. In typical active mode, this MCU consumes around 25–30 µA/MHz, making it competitive among mid-range L4 devices. For applications like sensor nodes or wearables, this efficiency supports extended battery life while maintaining real-time responsiveness.

What are the key considerations when selecting between the STM32L442KCU6TR and an alternative like the STM32G0 series for a motor control application requiring CAN bus communication?: When choosing between the STM32L442KCU6TR and the STM32G071 (for example), several factors come into play. The STM32L442KCU6TR offers a full-featured Cortex-M4 with FPU, 256KB flash, and robust connectivity including CAN FD-ready peripherals, making it suitable for complex motor control algorithms involving field-oriented control (FOC) or encoder feedback via high-resolution timers. In contrast, the STM32G0 series uses a Cortex-M0+ core, which lacks hardware floating-point support and has limited DSP instructions, potentially increasing software complexity for math-intensive control loops. While the G0 may consume slightly less static power, the L4’s richer peripheral set—including QSPI, SAI, and multiple UART/USART instances—provides greater flexibility for multi-axis control systems. Additionally, the L442KCU6TR’s operating temperature range (-40°C to 85°C) ensures reliability in industrial environments common to motor drives.

Can the STM32L442KCU6TR be used in automotive-grade applications, and what limitations should engineers consider regarding qualification and reliability?: The STM32L442KCU6TR is not automotive-qualified (i.e., it lacks AEC-Q100 certification). It is designed for industrial and commercial use within its specified temperature range of -40°C to 85°C. For automotive applications requiring functional safety or long-term reliability under thermal cycling, vibration, or EMI stress, STMicroelectronics offers qualified parts in the same family, such as those designated with “Q” suffixes. Engineers must also note that this device has a Moisture Sensitivity Level (MSL) of 3 (168 hours), meaning proper handling during PCB assembly is essential to avoid pop-corruption. Using the STM32L442KCU6TR outside industrial environments increases risk of early failure and voids warranty claims in safety-critical systems unless additional derating and environmental testing are performed.

How much current does the STM32L442KCU6TR typically draw in deep sleep mode, and what configuration parameters influence this value?: In Stop mode with RTC running and backup domain enabled, the STM32L442KCU6TR can achieve ultra-low power consumption of approximately 900 nA. This assumes VBAT is connected if using backup registers, and all unnecessary peripherals are disabled. The actual current depends on factors such as whether the internal regulator is left in low-power mode, the state of the I/O pins (configured as analog inputs minimizes leakage), and the presence of external circuitry powered from VDD. During Standby mode with SRAM content retained, consumption drops further to ~1.2 µA, but wake-up time increases significantly. Proper configuration of the Power Control Unit (PCU) and enabling only required wake sources (e.g., RTC alarms or external interrupts) is critical to minimizing leakage and extending battery life in energy-harvesting applications.

What is the maximum number of simultaneous SPI transactions the STM32L442KCU6TR can handle efficiently, and how does DMA integration affect real-time performance?: The STM32L442KCU6TR contains up to four independent SPI interfaces, though only two are fully multiplexed with alternate functions. Efficient concurrent operation requires careful pin allocation and timing management due to shared buses and interrupt latency. However, when paired with its built-in DMA controller, multiple SPI streams can operate semi-simultaneously by transferring data directly between peripherals and memory without CPU intervention. For example, one SPI could stream sensor data to RAM while another handles display updates—provided the DMA channels are not oversubscribed. The STM32L442KCU6TR supports circular DMA modes and FIFO threshold controls, allowing burst transfers that reduce overhead. With proper design, three or four SPI devices can coexist with minimal jitter, assuming clock speeds stay below 18 MHz (half the APB1/APB2 max frequency).

Is there a difference in bootloader behavior between the STM32L442KCU6TR and earlier STM32F4 or STM32F7 series when using system memory boot mode?: Yes. Unlike some legacy STM32 families where bootloader entry required specific GPIO states or NRST manipulation, the STM32L442KCU6TR follows the unified STM32L4 boot sequence defined in RM0351. To enter system memory bootloader mode, users must assert BOOT0=1 and reset the device; no additional pins need to be configured. Once entered, the bootloader supports USB, USART, and I2C firmware upgrade protocols. This simplifies development compared to older architectures like the F4, which often required external pull-ups or manual clock configurations. Furthermore, the L4 bootloader includes enhanced security features such as read-out protection checks and option byte validation, improving robustness against accidental corruption.

How does the ADC resolution and sampling rate of the STM32L442KCU6TR perform in noisy industrial environments, and what calibration techniques improve measurement accuracy?: The STM32L442KCU6TR integrates a 12-bit SAR ADC with 10 channels capable of up to 5.33 MSPS in dual interleaved mode. In practice, continuous high-speed sampling introduces noise due to switching transients in digital circuits. To mitigate this, engineers should use the internal voltage reference (2.048V) instead of VREF+ if available, enable the internal buffer, and apply oversampling followed by decimation (OSR) in software. Calibration via the ADC_CALFACT register compensates for offset and gain errors introduced during fabrication. Additionally, averaging multiple samples (e.g., 16x) improves effective resolution to near-14 bits under stable conditions. Shielded traces, proper grounding, and analog/digital partition on the PCB layout are equally important. For dynamic signals, the STM32L442KCU6TR’s ADC trigger sources (TIM1/8 compare outputs, external pins, or software) allow synchronized conversions that align with PWM edges or sensor readings, enhancing signal fidelity.

What are the implications of using the STM32L442KCU6TR in a design requiring ISO 7637 pulse immunity, and are any hardware mitigations recommended?: The STM32L442KCU6TR is not specifically hardened against automotive transient surges described in ISO 7637-2. Operating within its rated voltage range (1.71V–3.6V) assumes clean power delivery. Without external protection, sudden load dumps or inductive kickback could exceed absolute maximum ratings and damage input pins or internal regulators. Recommended mitigations include placing TVS diodes on power rails, using ferrite beads with capacitors for filtering, and ensuring bypass capacitance (e.g., 100nF ceramic + 10µF tantalum) close to VDD/VSS pads. Input/output lines carrying LIN, CAN, or UART signals benefit from series resistors (22–100Ω) combined with ESD diodes to limit differential voltages. These measures do not qualify the MCU for automotive use but enhance robustness in harsh industrial settings where similar transients occur.

How does flash memory endurance affect long-term deployment of projects using the STM32L442KCU6TR, and what programming strategies extend write cycle lifetime?: The STM32L442KCU6TR’s flash memory supports up to 100,000 erase/write cycles per sector under normal conditions. For most firmware update scenarios, this exceeds operational lifespan by orders of magnitude. However, frequent writes to small memory regions (e.g., logging every second) can degrade sectors prematurely. To extend lifetime, implement wear leveling across multiple logical blocks mapped to physical flash sectors, and minimize writes by caching data in RAM until thresholds are met. Use the Flash Bank Swap feature if available to relocate critical code during updates, avoiding repeated erasures of the same area. The STM32L442KCU6TR supports flexible memory mapping and bank switching, enabling background updates without halting execution. Additionally, disabling debug access and enabling read-out protection helps prevent unintentional mass erases during development.

What role does the Internal Reference Voltage play in the STM32L442KCU6TR’s ADC accuracy, and how stable is it over temperature?: The STM32L442KCU6TR provides an internal 1.2V bandgap reference accessible via the VREFINT output. While convenient for single-ended measurements, its initial accuracy is ±5% and drifts approximately +0.8 mV/°C over the -40°C to 85°C range. This limits precision in applications requiring better than 1% accuracy across temperature. For higher fidelity, external precision references (e.g., 2.5V or 4.096V) should be used when possible. If relying on the internal reference, calibration routines that capture VREFINTADC readings at known supply voltages allow software compensation. The ADC itself also benefits from the internal voltage scaling network, which stabilizes conversion thresholds despite supply fluctuations within specification. Nonetheless, designers must account for reference drift in high-precision analog designs using the STM32L442KCU6TR.

Can the STM32L442KCU6TR drive multiple LEDs simultaneously through its GPIOs without additional drivers, and what current sourcing capabilities should be considered?: Each GPIO pin on the STM32L442KCU6TR can source/sink up to 25 mA continuously, with a total package limit of around 125 mA. Driving standard red LEDs (~2V forward drop) with 20 mA draws significant current per pin. While short bursts are feasible, sustained operation near maximum ratings risks overheating the bond wires or violating thermal limits. For arrays of LEDs, distribute loads across multiple pins and use current-limiting resistors tailored to VDD (e.g., 100Ω for 3.3V). Alternatively, employ external MOSFETs or shift registers for high-brightness displays. The STM32L442KCU6TR’s integrated PWM modules support variable brightness control without CPU load, making it suitable for indicator lighting when properly managed. Always verify worst-case power budgets in your schematic to avoid exceeding the 125 mA aggregate limit.

Parts with Similar Specifications

The three parts on the right have similar specifications to STMicroelectronics STM32L442KCU6TR

Product Attribute
Part Number	STM32L442KCU6	STM32L443RCI6TR	STM32L443CCT6TR	STM32L443CCF6TR
Manufacturer	STMicroelectronics	STMicroelectronics	STMicroelectronics	STMicroelectronics
Base Product Number	-	DAC34H84	MAX500	ADS62P42
Speed	-	-	-	-
EEPROM Size	-	-	-	-
Number of I/O	-	-	-	-
Voltage - Supply (Vcc/Vdd)	-	-	-	-
Core Processor	-	-	-	-
RAM Size	-	-	-	-
Data Converters	-	-	-	-
Series	-	-	-	-
Connectivity	-	-	-	-
Program Memory Type	-	-	-	-
Package / Case	-	196-LFBGA	16-DIP (0.300', 7.62mm)	64-VFQFN Exposed Pad
Peripherals	-	-	-	-
Mounting Type	-	Surface Mount	Through Hole	Surface Mount
Oscillator Type	-	-	-	-
Operating Temperature	-	-40°C ~ 85°C	0°C ~ 70°C	-40°C ~ 85°C
Program Memory Size	-	-	-	-
Package	-	Tape & Reel (TR)	Tube	Tape & Reel (TR)
Core Size	-	-	-	-
Supplier Device Package	-	196-NFBGA (12x12)	16-PDIP	64-VQFN (9x9)

STM32L442KCU6TR Datasheet PDF

Download STM32L442KCU6TR pdf datasheets and STMicroelectronics documentation for STM32L442KCU6TR - STMicroelectronics.

Datasheets: STM32L442KC.pdf
PCN Packaging: Material Barrier Bag 17/Dec/2020.pdf
PCN Assembly/Origin: Multi Dev 21/Sep/2022.pdf

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Customer Reviews

Evaluation: 10 Articles

Embe***dMotion

Aug 5, 2026

Purchased this DSP controller for a motor control application. Stable processing performance and very good response under varying loads.
FPGA***dio

Jul 30, 2026

This FPGA handled our logic design without any surprises. Configuration completed quickly and timing met the project requirements.
Nord***mbedded

Jul 20, 2026

Reliable FPGA with predictable behavior. Configuration and testing went smoothly, making development faster than expected.
Arch***ct

Jul 15, 2026

Used this device in a communication signal processing board. Stable timing and no unexpected issues during implementation.
FPGA***lorer88

Jul 7, 2026

The FPGA works properly and all functions operate as expected. Documentation required some additional research, but overall it is a usable device for smaller signal processing projects.
Nath***oleman

Jun 29, 2026

Used this sensor component in an industrial automation setup. Detection accuracy was consistent and installation was straightforward.
Emil***rperTech

Jun 23, 2026

Works exactly as described. I used it as a USB-to-SPI bridge in a small MCU development project and communication was stable from the first setup.
Liam***terTech

Jun 15, 2026

Used this CPLD in a logic control project. Programming was straightforward and signal timing matched the design requirements.
Nath***rooks

Jun 11, 2026

Installed this power component in a converter board. Output remained stable under different load conditions and thermal performance was better than expected.
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.

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America	United States	5
America	Brazil	7
Europe	Germany	5
	United Kingdom	4
	Italy	5
Oceania	Australia	6
Oceania	New Zealand	5
Asia	India	4
Asia	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

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