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STMicroelectronics STM32L081KZT6
- Part No.:
- STM32L081KZT6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 32-LQFP
- Datasheet:
-
STM32L081KZT6.pdf
- Description:
- IC MCU 32BIT 192KB FLASH 32LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:14,835
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Product details
Overview
STM32L081KZT6 from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M0+ microcontroller in UFQFPN32 (5×5 mm) package, featuring 192 KB Flash with ECC, 20 KB SRAM, 6 KB EEPROM, 12-bit ADC (1.14 Msps), and hardware AES-128 encryption. It operates from 1.65–3.6 V across –40 to +125 °C and targets battery-powered IoT sensors and smart meters requiring long runtime and secure firmware updates.
For engineers reviewing the STM32L081KZT6 datasheet, STM32L081KZT6 pinout, STM32L081KZT6 application, or STM32L081KZT6 equivalent, key selection criteria include standby current (0.29 µA), RTC+RAM retention in Stop mode (0.86 µA), 5 µs Flash wakeup time, and dual ultra-low-power comparators with wake-up capability down to 1.65 V.
Technical Context
The STM32L081KZT6 integrates a Cortex-M0+ core with MPU, supporting dynamic voltage scaling and multiple low-power modes (Run, Sleep, Low-power Run/Sleep, Stop, Standby). Its clock system includes HSI16 (±1%), LSE (32 kHz RTC), MSI (65 kHz–4.2 MHz), and PLL for CPU clock generation up to 32 MHz.
Analog subsystem comprises a 12-bit ADC with up to 16 channels, two independent comparators (window mode + wake-up), temperature sensor, and internal voltage reference (VREFINT). Peripherals include 4x USART (2 with ISO 7816/IrDA), 6x SPI (16 Mbit/s), 3x I2C (2 with SMBus/PMBus), 11 timers (including LPTIM and RTC), and 7-channel DMA supporting AES, ADC, and communication interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Arm Cortex-M0+ with MPU, 32 MHz max frequency, 0.95 DMIPS/MHz performance |
| Memory | 192 KB Flash (dual-bank, read-while-write, ECC), 20 KB SRAM, 6 KB EEPROM (ECC) |
| Power Consumption | 0.29 µA Standby (3 wakeup pins), 0.86 µA Stop + RTC + 20 KB RAM retention |
| ADC | 12-bit, 1.14 Msps, 16-channel, operational down to 1.65 V supply |
| Crypto Engine | Hardware AES-128 accelerator with dedicated DMA channel for secure firmware update |
| Temperature Range | –40 °C to +125 °C, qualified for industrial and extended-temperature metering applications |
| Wakeup Time | 5 µs from Flash memory, enabling rapid response to external events in sensor nodes |
Pinout & Package
STM32L081KZT6 is housed in a 32-pin UFQFPN (5×5 mm, 0.5 mm pitch) package compliant with ECOPACK2 environmental standards. Pin count and layout match the LQFP32 variant but with reduced footprint and improved thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Core & I/O power supply | 1.65–3.6 V input; powers digital logic and 31 5V-tolerant I/Os |
| VSS | Ground reference | Dedicated analog/digital ground pins support noise-sensitive ADC operation |
| NRST | Active-low reset input | Internal BOR/POR ensures reliable startup; supports external reset assertion |
| PA0–PA15 | General-purpose I/O bank A | Up to 16 pins configurable as GPIO, ADC inputs, timer channels, or USART/I2C/SPI functions |
| PB0–PB11 | General-purpose I/O bank B | 12 pins supporting alternate functions including LPUART, I2C, SPI, and comparator inputs |
| BOOT0 | Boot mode selection | High at reset enables system memory bootloader (USART/I2C/SPI); low selects main Flash |
| SWDIO/SWCLK | Serial Wire Debug interface | 2-pin debug port for programming and real-time trace without halting CPU |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power Stop mode | 0.86 µA with RTC running and full 20 KB RAM retained - enables multi-year battery life in periodic-sense applications |
| Hardware AES-128 | Dedicated crypto engine offloads CPU, enabling secure OTA updates without compromising real-time sensor processing |
| Dual ultra-low-power comparators | Operate down to 1.65 V with window mode detection and independent wake-up capability - ideal for threshold-based event triggering |
| Flexible clock system | Multiple internal oscillators (HSI16, MSI, LSI) plus HSE/LSE support precise timing and seamless low-power transitions |
| EEPROM with ECC | 6 KB data EEPROM with error correction ensures robust parameter storage across 100k write cycles and 20-year data retention |
Applications
| Smart Utility Metering | Wireless Sensor Node |
|---|---|
Use Scenario: Gas/water/electricity meter with hourly pulse counting, temperature compensation, and encrypted data upload via NB-IoT. IC Role / Device Role / Timing Role: Main controller managing metrology ADC sampling, RTC-based billing intervals, and AES-encrypted payload generation. Use Value: 0.86 µA Stop+RTC mode extends battery life beyond 10 years; 6 KB EEPROM stores calibration coefficients and tamper logs with ECC protection. |
Use Scenario: Battery-powered environmental node measuring temperature, humidity, and CO₂ every 5 minutes, transmitting via BLE or LoRaWAN. IC Role / Device Role / Timing Role: System-on-chip handling sensor interfacing (I2C/ADC), low-power scheduling (LPTIM), and secure packet assembly. Use Value: Dual comparators monitor battery voltage thresholds for graceful shutdown; 5 µs wakeup ensures minimal latency on motion-triggered sampling. |
| Industrial Asset Monitor | Secure Firmware Update Endpoint |
Use Scenario: Vibration and temperature monitor on rotating machinery, logging data locally and alerting on anomaly detection. IC Role / Device Role / Timing Role: Real-time data acquisition hub with 12-bit ADC oversampling, FFT preprocessing, and watchdog-protected execution. Use Value: 1.14 Msps ADC captures high-frequency vibration spectra; 20 KB SRAM buffers burst samples before compression and transmission. |
Use Scenario: Edge device receiving signed firmware images over TLS, verifying integrity, and applying updates without bricking. IC Role / Device Role / Timing Role: Secure boot loader executing authenticated decryption (AES-128) and flash reprogramming under MPU-enforced isolation. Use Value: Hardware crypto engine processes 128-bit blocks in <100 cycles; dual-bank Flash enables atomic swap updates with zero downtime. |
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 |
|---|---|---|---|
| STM32L071KZT6 | 192 KB Flash, 20 KB SRAM, but only 2 KB EEPROM and no hardware AES engine | Lacks cryptographic acceleration; unsuitable for devices requiring secure OTA or data-at-rest encryption | Select when cost sensitivity outweighs security requirements and EEPROM usage is minimal |
| STM32L431KCU6 | Cortex-M4F core, 256 KB Flash, 64 KB SRAM, 1 MB/s ADC, but higher active current (81 µA/MHz) | Better compute throughput and DSP capability, but 2.8× higher Run-mode current limits battery lifetime | Prefer for sensor fusion or ML inference at edge; avoid in energy-constrained deployments |
Compared with STM32L071KZT6, STM32L081KZT6 adds hardware AES and doubles EEPROM capacity-critical for secure, field-upgradable metering. Versus STM32L431KCU6, it trades raw performance for 3× lower active power, making it optimal for infrequent-sense, long-life applications.
Availability
STM32L081KZT6 is available at Aetrix Electronics and suitable for smart utility metering, wireless sensor nodes, industrial asset monitoring, and secure firmware update endpoints requiring stable component supply across extended product lifecycles.
Supply support for STM32L081KZT6 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, MEMS, and automotive semiconductors since 1987.
The STM32L0 series targets ultra-low-power embedded applications where energy efficiency, security, and extended temperature operation are critical - especially in battery-powered metering, wearables, and industrial sensing.
FAQ
What is the maximum operating frequency of the STM32L081KZT6?
The STM32L081KZT6 supports a maximum CPU clock frequency of 32 MHz, achievable via its PLL or HSI16 oscillator. Frequency scaling is dynamically managed by the power control unit to maintain optimal current consumption across voltage ranges (1.65–3.6 V), with guaranteed 0.95 DMIPS/MHz performance at all operating points.
Does the STM32L081KZT6 support USB or CAN interfaces?
No, the STM32L081KZT6 does not integrate USB or CAN peripherals. Its communication suite includes 4x USART (2 with ISO 7816/IrDA), 1x LPUART, up to 6x SPI, and 3x I2C (2 with SMBus/PMBus). For USB or CAN connectivity, external transceivers or companion ICs must be used in the system design.
How is the 6 KB EEPROM implemented physically?
The 6 KB EEPROM is implemented as a dedicated memory block within the Flash array, using the same NOR Flash technology but with enhanced endurance (100,000 write/erase cycles) and retention (20 years at 85 °C). It features built-in ECC for single-bit error correction and is accessed via standard memory-mapped reads/writes using the PEC (Program/Erase Controller) peripheral.
Can the STM32L081KZT6 operate reliably at 125 °C ambient temperature?
Yes, the STM32L081KZT6 is fully specified and tested for operation from –40 °C to +125 °C ambient. Electrical characteristics-including Flash programming voltage, ADC accuracy, and oscillator stability-are guaranteed across this range per DS10888 Rev 6, making it suitable for enclosed metering enclosures and industrial control cabinets without forced cooling.
STM32L081KZT6 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, I2S, POR, PWM, WDT
- Number of I/O:
- 25
- Program Memory Size:
- 192KB (192K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 6K x 8
- RAM Size:
- 20K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.65V ~ 3.6V
- Data Converters:
- A/D 10x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32L081KZT6 FAQ
1.How can I place an order for STM32L081KZT6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L081KZT6 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 STM32L081KZT6 reliable?
The price and inventory of STM32L081KZT6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L081KZT6 is usually 5 days.
3.What payment methods are accepted for STM32L081KZT6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L081KZT6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L081KZT6?
STM32L081KZT6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L081KZT6 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 STM32L081KZT6?
For technical support, including STM32L081KZT6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L081KZT6 requirements.
6.How does Aetrix verify that STM32L081KZT6 is sourced from the original manufacturer or authorized distributors?
All STM32L081KZT6 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 STM32L081KZT6 meets industry standards.
7.What is the process for return or replacement of STM32L081KZT6?
All STM32L081KZT6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32L081KZT6, 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 STM32L081KZT6 part is unused and in its original packaging.
Return procedure for STM32L081KZT6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STM32L081KZT6 Tags
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