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STMicroelectronics STM32L071KBT6
- Part No.:
- STM32L071KBT6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 32-LQFP
- Datasheet:
-
STM32L071KBT6.pdf
- Description:
- IC MCU 32BIT 128KB FLASH 32LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,896
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Product details
Overview
STM32L071KBT6 from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M0+ microcontroller in LQFP32 package, featuring 128 KB Flash, 20 KB SRAM, 6 KB EEPROM with ECC, 12-bit ADC (1.14 Msps), and operation down to 1.65 V. It delivers 0.86 µA Stop mode + RTC + RAM retention and 5 µs wakeup from Flash-enabling battery-powered sensor nodes and smart metering endpoints.
For engineers reviewing the STM32L071KBT6 datasheet, STM32L071KBT6 pinout, STM32L071KBT6 application, or STM32L071KBT6 equivalent, key selection criteria include verified ultra-low-power modes (0.29 µA Standby), dual ultra-low-power comparators with wake-up capability, 4x USART (2 ISO 7816-capable), and hardware CRC unit for secure firmware updates.
Technical Context
The STM32L071KBT6 integrates a Cortex-M0+ core with MPU, running at up to 32 MHz with 0.95 DMIPS/MHz efficiency. Its memory subsystem includes dual-bank Flash with read-while-write and ECC protection, plus 6 KB of data EEPROM also protected by ECC-critical for field-updatable parameter storage in industrial edge devices.
Power management features include five selectable BOR thresholds, programmable voltage detector (PVD), and dynamic voltage scaling across three operating ranges. Clock architecture combines HSE (1–25 MHz), LSE (32 kHz RTC), factory-trimmed 16 MHz HSI, and multispeed MSI (65 kHz–4.2 MHz), enabling precise low-power timing control without external crystals.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Arm Cortex-M0+ with MPU, 32 MHz max - enables deterministic real-time control with memory protection for certified firmware partitions. |
| Flash / EEPROM | 128 KB Flash (dual-bank, ECC, RWW) / 6 KB EEPROM (ECC) - supports safe over-the-air updates and nonvolatile configuration storage with error correction. |
| RAM | 20 KB SRAM - sufficient for RTOS task stacks, sensor fusion buffers, and cryptographic context in constrained-edge applications. |
| ADC | 12-bit, 1.14 Msps, 16-channel - delivers high-resolution analog sensing at low power (41 µA @ 10 ksps) down to 1.65 V supply. |
| Low-Power Modes | 0.29 µA Standby (3 wakeup pins), 0.86 µA Stop+RTC+20KB RAM retention - extends 10-year battery life in wireless sensor transmitters. |
| Peripherals | 4x USART (2 ISO 7816), 3x I2C (2 SMBus/PMBus), 6x SPI, 2x ultra-low-power comparators - enables mixed-protocol connectivity in utility metering and asset trackers. |
| Package | LQFP32 (7 × 7 mm, 0.8 mm pitch) - compact, hand-solderable footprint ideal for space-constrained PCBs in portable medical and IoT endpoints. |
Pinout & Package
LQFP32 package (7 × 7 mm, 0.8 mm pitch), RoHS-compliant, ECOPACK2 certified. 32-pin quad flat package with exposed thermal pad (EP) on underside for enhanced thermal dissipation in sealed enclosures.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply | Main 1.65–3.6 V digital/analog supply; decoupling required per datasheet Section 6.1.6. |
| VSS | Ground reference | Digital ground plane connection; separate analog ground (VSSA) recommended for ADC stability. |
| NRST | Active-low reset input | Asynchronous reset with internal pull-up; accepts 1.65–3.6 V logic; supports external reset button or supervisor IC. |
| PA0–PA15 | General-purpose I/O | Up to 16 GPIOs on Port A; 78 total I/Os (72 5V-tolerant); support multiple alternate functions including USART, SPI, TIM. |
| BOOT0 | Boot mode select | High at reset enables system memory bootloader; pulled low via 10 kΩ resistor to VSS for normal Flash execution. |
| SWDIO / SWCLK | Debug interface | Serial Wire Debug (SW-DP) pins enable non-intrusive programming and real-time trace without dedicated JTAG pins. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power standby | 0.29 µA with 3 wakeup pins enabled - reduces coin-cell drain to <1 µA average in periodic wake-up sensor sampling. |
| Hardware ECC | On both Flash and EEPROM - prevents silent data corruption in long-life deployments (e.g., smart grid infrastructure). |
| ISO 7816 UART | 2x USART with ISO/IEC 7816-3 support - enables direct interface to secure elements and contact smart cards in payment or access control systems. |
| Temperature sensor | Calibrated ±1.5°C accuracy (–40 to 125°C) - provides on-chip thermal monitoring without external components in motor controllers or battery packs. |
| Independent watchdog | IWDG with 12-bit downcounter and window option - ensures fail-safe recovery from software hangs in safety-critical firmware. |
Applications
| Smart Utility Metering | Wireless Sensor Node |
|---|---|
|
Use Scenario: Gas/water meter with ultrasonic flow sensing, LoRaWAN backhaul, and 10-year battery life. IC Role / Device Role: Main controller managing ADC sampling, RTC-based billing intervals, AES encryption, and low-power radio coexistence. Use Value: 0.86 µA Stop+RTC mode preserves timekeeping and retains 20 KB RAM for session state while extending battery life beyond 10 years. |
Use Scenario: Battery-powered environmental monitor (temp/humidity/pressure) transmitting hourly via BLE or NB-IoT. IC Role / Device Role: Sensor hub aggregating data, performing local threshold detection, and entering deep sleep between transmissions. Use Value: Dual ultra-low-power comparators trigger wake-up on analog events (e.g., door open), eliminating polling and reducing average current to <2 µA. |
| Portable Medical Device | Industrial Edge Controller |
|
Use Scenario: Handheld blood glucose meter with LCD, USB charging, and clinical-grade calibration storage. IC Role / Device Role: System-on-chip handling electrochemical ADC, EEPROM-based calibration coefficients, and USB device enumeration. Use Value: 6 KB EEPROM with ECC ensures regulatory-compliant, tamper-resistant storage of calibration data across 10,000+ write cycles. |
Use Scenario: DIN-rail mounted PLC I/O module with isolated digital inputs, Modbus RTU over RS-485, and firmware update capability. IC Role / Device Role: Communication coprocessor managing Modbus framing, CRC validation, and secure OTA updates via UART or SPI flash. Use Value: Hardware CRC calculation unit offloads CPU during packet integrity checks, enabling deterministic <100 µs response in real-time protocols. |
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 |
|---|---|---|---|
| STM32L072KBT6 | Same package and peripherals, but adds AES-128 hardware crypto engine and true random number generator (TRNG). | Better suited for secure firmware signing, TLS handshake acceleration, and FIPS-compliant key generation. | Select when cryptographic acceleration or NIST SP800-90B entropy compliance is required; otherwise, STM32L071KBT6 offers cost advantage. |
| STM32L031K6T6 | Smaller footprint (LQFP32), 32 KB Flash, 8 KB SRAM, no EEPROM, single comparator, no ISO 7816 UART. | Targeted at simpler, lower-cost endpoints where EEPROM persistence and dual-comparator wake-up are unnecessary. | Choose for cost-sensitive, short-lifecycle products (e.g., disposable sensors) where 128 KB Flash and 6 KB EEPROM are unused overhead. |
Compared with STM32L072KBT6, this part omits crypto accelerators but retains identical low-power performance and EEPROM reliability; versus STM32L031K6T6, it delivers 4× more Flash, full EEPROM, and dual comparators-justifying its use in field-deployed, upgradable edge nodes.
Availability
STM32L071KBT6 is available at Aetrix Electronics and suitable for smart metering, wireless sensor networks, portable medical devices, and industrial edge controllers requiring stable component supply across multi-year production cycles.
Supply support for STM32L071KBT6 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 management ICs, MEMS, and automotive semiconductors since 1987.
The STM32L0 series targets ultra-low-power embedded applications demanding extended battery life, robust memory integrity, and rich analog integration-optimized for metering, wearables, and industrial IoT endpoints.
FAQ
What is the maximum operating temperature range for the STM32L071KBT6?
The STM32L071KBT6 is rated for –40 °C to +125 °C ambient operation, validated per datasheet Section 6.3.1. This extended range supports deployment in automotive under-hood modules, industrial motor drives, and outdoor utility meters without derating.
Does the STM32L071KBT6 support hardware encryption?
No, the STM32L071KBT6 does not include hardware AES or TRNG blocks. Those features are present in the pin-compatible STM32L072KBT6 variant. This part relies on software-based cryptography libraries for security functions.
How many I/O pins are 5V tolerant on the STM32L071KBT6?
78 of the 84 fast I/Os are 5V tolerant, as confirmed in the datasheet Feature list and Section 3.7. This allows direct interfacing with legacy 5V peripherals (e.g., RS-232 transceivers, industrial sensors) without level-shifting circuitry.
Can the STM32L071KBT6 run from an internal RC oscillator only?
Yes-it supports full operation using the factory-trimmed 16 MHz HSI, 37 kHz LSI, or multispeed MSI (65 kHz–4.2 MHz). No external crystal is required, though HSE (1–25 MHz) and LSE (32 kHz) are supported for higher precision or RTC accuracy.
STM32L071KBT6 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
- Peripherals:
- Brown-out Detect/Reset, DMA, I2S, POR, PWM, WDT
- Number of I/O:
- 25
- Program Memory Size:
- 128KB (128K 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:
STM32L071KBT6 FAQ
1.How can I place an order for STM32L071KBT6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L071KBT6 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 STM32L071KBT6 reliable?
The price and inventory of STM32L071KBT6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L071KBT6 is usually 5 days.
3.What payment methods are accepted for STM32L071KBT6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L071KBT6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L071KBT6?
STM32L071KBT6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L071KBT6 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 STM32L071KBT6?
For technical support, including STM32L071KBT6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L071KBT6 requirements.
6.How does Aetrix verify that STM32L071KBT6 is sourced from the original manufacturer or authorized distributors?
All STM32L071KBT6 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 STM32L071KBT6 meets industry standards.
7.What is the process for return or replacement of STM32L071KBT6?
All STM32L071KBT6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32L071KBT6, 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 STM32L071KBT6 part is unused and in its original packaging.
Return procedure for STM32L071KBT6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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