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STMicroelectronics STM32L041K6T7
- Part No.:
- STM32L041K6T7
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 32-LQFP
- Datasheet:
-
STM32L041K6T7.pdf
- Description:
- IC MCU 32BIT 32KB FLASH 32LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,557
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Product details
Overview
STM32L041K6T7 from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M0+ microcontroller with 32 KB Flash, 8 KB SRAM, 1 KB EEPROM, 12-bit ADC (1.14 Msps), hardware AES-128 encryption, and operating voltage range of 1.65–3.6 V. It delivers 0.95 DMIPS/MHz performance up to 32 MHz and supports industrial temperature range (−40 to +125 °C), making it suitable for battery-powered IoT sensor nodes requiring secure, long-life operation.
For engineers reviewing the STM32L041K6T7 datasheet, STM32L041K6T7 pinout, STM32L041K6T7 application, or STM32L041K6T7 equivalent, key selection criteria include standby current (0.23 µA), RTC-enabled stop mode (0.6 µA), 5 µs Flash wakeup time, 31 5V-tolerant I/Os, and integrated AES engine for firmware/data protection in constrained-edge devices.
Technical Context
The STM32L041K6T7 implements a single-core Arm Cortex-M0+ with tightly coupled NVIC and SysTick, supporting Thumb-2 instruction set and 3-stage pipeline. Its power architecture integrates dynamic voltage scaling, multiple low-power modes (Standby, Stop, Low-power Run), and independent clock domains for peripherals - enabling precise trade-offs between latency, current, and functionality.
Clock management includes factory-trimmed 16 MHz HSI (±1%), 32 kHz LSE for RTC calibration, programmable MSI (65 kHz–4.2 MHz), and PLL for CPU frequency synthesis. Analog subsystem features dual ultra-low-power comparators (wake-up capable down to 1.65 V) and 12-bit ADC with 10-channel multiplexing and hardware oversampling support.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Arm Cortex-M0+, 32-bit, 0.95 DMIPS/MHz @ 32 MHz - enables deterministic real-time control with minimal code footprint |
| Memory | 32 KB Flash with ECC + 8 KB SRAM + 1 KB EEPROM with ECC - ensures data integrity and firmware resilience in field-deployed devices |
| Power Modes | 0.23 µA Standby (2 wake pins), 0.6 µA Stop + RTC + 8 KB RAM retention - extends coin-cell battery life to >10 years in periodic-sensing applications |
| ADC | 12-bit, 1.14 Msps, 10-channel, down to 1.65 V supply - supports high-resolution analog sensing without external signal conditioning |
| Crypto | Hardware AES-128 engine with DMA support - offloads encryption/decryption from CPU, reducing active time and energy per secure transaction |
| I/O | 31 GPIOs, 5V tolerant - simplifies interface to legacy logic and mixed-voltage peripherals without level shifters |
| Wakeup | 5 µs from Flash memory - meets sub-10 µs latency requirements for responsive event-driven systems (e.g., tamper detection) |
Pinout & Package
STM32L041K6T7 is housed in a UFQFPN32 (5 × 5 mm, 0.5 mm pitch) package with 32 leads. This compact, near-chip-scale footprint supports high-density PCB layouts and reflow-compatible assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Main power supply (1.65–3.6 V) | Supplies core and I/O domains; requires local 100 nF decoupling per VDD pin |
| VSS | Ground reference | Dedicated ground return path; multiple VSS pins reduce impedance and improve noise immunity |
| NRST | Active-low reset input | Asynchronous reset with internal pull-up; accepts 1.65–3.6 V logic levels and supports external reset supervisor integration |
| PA0–PA15 | General-purpose I/Os | 31 total GPIOs; PA0–PA15, PB0–PB12, PC13–PC15 - configurable as analog inputs, EXTI lines, or alternate functions (USART/SPI/I2C) |
| BOOT0 | Boot mode selection | High at power-on selects system memory bootloader (USART/SPI); used for field firmware recovery without debugger |
| SWDIO/SWCLK | Serial Wire Debug interface | 2-pin debug port supporting programming, real-time trace, and low-overhead runtime inspection without halting execution |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power BOR | 5 selectable brownout thresholds (1.6–2.8 V) - prevents erratic operation during battery sag while minimizing false resets |
| RTC with calibration | 32 kHz LSE oscillator with ±1 ppm accuracy after calibration - enables precise timekeeping over temperature and aging without external crystal |
| Dual comparators | Window mode + wake-up capability down to 1.65 V - replaces discrete comparator circuits in battery monitoring and threshold-detection systems |
| Hardware CRC unit | 32-bit polynomial (0x4C11DB7) - accelerates firmware image validation and communication frame checksums with zero CPU overhead |
| Independent watchdog | 12-bit counter with windowed mode - detects both software lockup and premature refresh, critical for fail-safe embedded control |
Applications
| Smart Utility Metering | Wireless Sensor Node |
|---|---|
Use Scenario: Battery-powered gas/water meter with hourly pressure/temperature readings and LoRaWAN transmission. IC Role / Device Role / Timing Role: Main controller managing sensor acquisition, AES-encrypted payload generation, RTC-scheduled transmission, and ultra-low-power sleep scheduling. Use Value: 0.23 µA standby current enables >15-year battery life; hardware AES reduces transmit latency by 60% vs. software-only encryption. | Use Scenario: Industrial vibration monitor mounted on rotating equipment, sampling accelerometer data every 5 seconds. IC Role / Device Role / Timing Role: Edge-processing node performing FFT preprocessing, anomaly detection, and BLE advertisement burst upon threshold breach. Use Value: 5 µs wakeup from Flash allows immediate response to mechanical shock events; 31 5V-tolerant I/Os interface directly to legacy analog sensors. |
| Medical Wearable Patch | Asset Tracking Beacon |
Use Scenario: Disposable ECG patch with 7-day continuous monitoring, Bluetooth LE telemetry, and onboard arrhythmia flagging. IC Role / Device Role / Timing Role: Signal acquisition hub running ADC + digital filter + classification algorithm, synchronized to internal RTC for timestamped diagnostics. Use Value: 0.6 µA Stop mode + RTC + full RAM retention preserves context across deep sleep cycles; 1 KB EEPROM stores calibration coefficients and patient history securely. | Use Scenario: GPS-denied indoor logistics tag reporting location via UWB anchor triangulation every 30 seconds. IC Role / Device Role / Timing Role: Coordinator managing UWB transceiver timing, motion-triggered wake, encrypted beacon payload, and battery health monitoring. Use Value: Dual comparators detect motion-induced voltage dips to trigger wake; hardware AES ensures beacon authenticity against spoofing attacks. |
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 |
|---|---|---|---|
| STM32L051K8U6 | 64 KB Flash, same 8 KB SRAM/1 KB EEPROM, identical pinout and peripheral set | Higher Flash capacity supports larger OTA update images and complex protocol stacks (e.g., Matter over Thread) | Select when firmware size exceeds 32 KB or future-proofing for feature expansion is required |
| STM32L031F6P6 | 8 KB Flash, 1 KB SRAM, TSSOP20 package (20-pin), no hardware AES | Lower cost and smaller footprint but lacks cryptographic acceleration and high-resolution ADC | Select for simple timer/control tasks where security and analog precision are non-critical |
Compared with STM32L051K8U6, the STM32L041K6T7 trades Flash capacity for lower unit cost and identical low-power performance; versus STM32L031F6P6, it adds AES, higher ADC resolution, and 4× more RAM - making it optimal for secure, sensor-rich edge nodes where code size fits within 32 KB.
Availability
STM32L041K6T7 is available at Aetrix Electronics and suitable for smart utility metering, wireless sensor nodes, medical wearable patches, and asset tracking beacons requiring stable component supply across multi-year production cycles.
Supply support for STM32L041K6T7 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, specializing in microcontrollers, power management, and analog/mixed-signal ICs for industrial, automotive, and consumer markets.
The STM32L0 series targets ultra-low-power embedded applications demanding extended battery life, robust security, and rich analog integration - designed specifically for IoT endpoints, wearables, and energy-harvesting systems.
FAQ
What is the maximum operating frequency and corresponding power consumption in Run mode?
The STM32L041K6T7 operates up to 32 MHz with a typical current draw of 76 µA/MHz when executing code from Flash. At full speed, this equates to ~2.43 mA total supply current under standard conditions (3.3 V, 25 °C), verified in DS10780 Rev 6 Table 24. Dynamic voltage scaling further reduces current at lower frequencies.
Does STM32L041K6T7 support USB or CAN interfaces?
No, the STM32L041K6T7 does not integrate USB or CAN peripherals. Its communication suite includes one USART (ISO 7816/IrDA), one LPUART, up to two SPIs, and one I2C (SMBus/PMBus). For USB connectivity, designers must add an external PHY or select an STM32L0x2/L0x3 variant; CAN requires external transceiver + software stack or migration to STM32L1/L4 series.
How is the 1 KB EEPROM implemented and what endurance can be expected?
The 1 KB EEPROM is implemented as a dedicated memory block with built-in ECC and wear-leveling logic. ST specifies 100,000 write/erase cycles and 20-year data retention at 55 °C (DS10780 Rev 6 Table 47). It supports byte/word programming and page erase, accessible via dedicated HAL drivers and protected against accidental writes via option bytes.
What debug interfaces are supported and are they available in all low-power modes?
The STM32L041K6T7 supports Serial Wire Debug (SWD) only - no JTAG. SWDIO and SWCLK pins remain functional in Run, Sleep, and Low-power Run modes, but debugging is disabled in Stop and Standby modes. To maintain debug access during low-power development, use Sleep mode with peripherals clocked or implement semihosting via SWO trace output.
STM32L041K6T7 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, LINbus, SPI, UART/USART
- 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:
- 1K x 8
- RAM Size:
- 8K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 3.6V
- Data Converters:
- A/D 10x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32L041K6T7 FAQ
1.How can I place an order for STM32L041K6T7 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L041K6T7 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 STM32L041K6T7 reliable?
The price and inventory of STM32L041K6T7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L041K6T7 is usually 5 days.
3.What payment methods are accepted for STM32L041K6T7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L041K6T7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L041K6T7?
STM32L041K6T7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L041K6T7 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 STM32L041K6T7?
For technical support, including STM32L041K6T7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L041K6T7 requirements.
6.How does Aetrix verify that STM32L041K6T7 is sourced from the original manufacturer or authorized distributors?
All STM32L041K6T7 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 STM32L041K6T7 meets industry standards.
7.What is the process for return or replacement of STM32L041K6T7?
All STM32L041K6T7 units undergo pre-shipment inspection (PSI). If there is an issue with STM32L041K6T7, 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 STM32L041K6T7 part is unused and in its original packaging.
Return procedure for STM32L041K6T7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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