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STMicroelectronics STM32L071KBT6TR
- Part No.:
- STM32L071KBT6TR
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 32-LQFP
- Datasheet:
-
STM32L071KBT6TR.pdf
- Description:
- IC MCU 32BIT 128KB FLASH 32LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,750
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Product details
Overview
STM32L071KBT6TR from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M0+ microcontroller in LQFP32 package, featuring 192 KB Flash, 20 KB SRAM, 6 KB EEPROM with ECC, 12-bit ADC (1.14 Msps), and operation from 1.65 V to 3.6 V across –40 °C to 125 °C. It delivers 0.95 DMIPS/MHz performance and supports battery-powered IoT sensor nodes requiring long-term autonomous operation with RTC + RAM retention.
For engineers reviewing the STM32L071KBT6TR datasheet, STM32L071KBT6TR pinout, STM32L071KBT6TR application, or STM32L071KBT6TR equivalent, key selection criteria include standby current (0.29 µA), wakeup time (5 µs from Flash), 78 I/Os (5V tolerant), integrated EEPROM endurance (100k cycles), and dual ultra-low-power comparators with wake-up capability down to 1.65 V.
Technical Context
The STM32L071KBT6TR implements a single-core Arm Cortex-M0+ with Memory Protection Unit (MPU), operating at up to 32 MHz using multiple clock sources: HSI16 (±1%), LSE (32 kHz for RTC), MSI (65 kHz–4.2 MHz), and PLL. Its power architecture includes five low-power modes-Run, Sleep, Low-power Run, Low-power Sleep, Stop, and Standby-with dedicated voltage regulators and brownout reset (BOR) with five threshold levels.
Analog subsystem integration includes one 12-bit ADC with up to 16 channels, two independent ultra-low-power comparators (each supporting window mode and wake-up), internal temperature sensor, and VREFINT reference. The interconnect matrix routes peripherals-including four USARTs (two ISO 7816/IrDA-capable), three I2C (two SMBus/PMBus), six SPI, eleven timers, and seven-channel DMA-to memory and I/O without CPU intervention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Arm Cortex-M0+, 32 MHz max, 0.95 DMIPS/MHz - enables deterministic real-time control with minimal code footprint. |
| Memory | 192 KB Flash (dual-bank, RWW, ECC), 20 KB SRAM, 6 KB EEPROM (ECC, 100k write/erase cycles) - supports firmware updates without data loss and persistent parameter storage. |
| Power Consumption | 0.29 µA Standby (3 wakeup pins), 0.86 µA Stop + RTC + 20 KB RAM retention - extends coin-cell battery life to >10 years in metering applications. |
| ADC | 12-bit, 1.14 Msps, 16-channel, operational down to 1.65 V - enables high-resolution sensor acquisition in low-voltage battery systems. |
| Timers | 11 timers including 2x 16-bit advanced (4-channel), 1x ultra-low-power LPTIM, RTC, SysTick, and 2x watchdogs - supports precise timing, PWM generation, and safety-critical timeout monitoring. |
| I/O | 25 fast I/Os (all 5V tolerant), configurable pull-up/down, interrupt on all pins - simplifies interface to legacy 5V logic and industrial sensors without level shifters. |
| Clock Sources | HSI16 (±1%), LSE (32 kHz ±20 ppm), MSI (65 kHz–4.2 MHz), PLL - provides flexible, low-jitter timing for communication, RTC, and dynamic voltage scaling. |
Pinout & Package
LQFP32 (7 × 7 mm, 0.8 mm pitch, ECOPACK2-compliant) with 25 user I/Os, 3 power supply pins (VDD, VDDA, VSS), 3 ground pins (VSS, VSSA, VREF+), NRST, BOOT0, and dedicated debug (SWDIO/SWCLK) pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Main digital power supply | 1.65–3.6 V input; powers core, memories, and digital peripherals; requires local 100 nF decoupling. |
| VDDA | Analog power supply | Independent 1.65–3.6 V rail for ADC, comparators, and VREFINT; must be filtered and isolated from digital noise. |
| VSS / VSSA | Digital/analog ground | Separate ground returns minimize coupling between digital switching noise and analog measurements. |
| NRST | Active-low reset input | Asynchronous reset with internal pull-up; accepts external push-button or supervisor IC assertion. |
| BOOT0 | Boot mode selection | High at reset enables system memory bootloader; low selects main Flash memory execution. |
| PA0–PA15, PB0–PB11 | General-purpose I/Os | 25 total GPIOs; all 5V tolerant, support EXTI, alternate functions (USART, SPI, I2C, timers), and analog inputs. |
| SWDIO / SWCLK | Serial Wire Debug interface | 2-pin debug port for programming and real-time trace; no JTAG required, minimizing PCB footprint. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power BOR | 5 selectable thresholds (1.65–2.9 V) enable precise brownout detection across battery discharge curves. |
| Read-while-write Flash | Dual-bank architecture allows firmware update in one bank while executing from the other - critical for zero-downtime field upgrades. |
| Embedded EEPROM | 6 KB of data EEPROM with ECC ensures reliable nonvolatile storage of calibration data and device configuration without external components. |
| Low-power comparators | Two independent comparators with programmable hysteresis and wake-up from Stop/Standby - replaces discrete comparator + MCU wake logic. |
| Pre-programmed bootloader | Factory-loaded USART/I2C/SPI bootloader eliminates need for external programmer during production or field recovery. |
Applications
| Smart Utility Metering | Wireless Sensor Node |
|---|---|
|
Use Scenario: Battery-powered water/gas meter with pulse counting, temperature sensing, and LoRaWAN transmission every 15 minutes. IC Role / Device Role / Timing Role: Main controller managing sensor acquisition, RTC-based scheduling, ultra-low-power sleep/wake cycles, and secure firmware updates via bootloader. Use Value: 0.29 µA standby current and 5 µs wakeup enable >15-year battery life; integrated EEPROM stores meter calibration and tamper logs securely. |
Use Scenario: Industrial vibration sensor node with MEMS accelerometer, local FFT processing, and BLE beacon reporting. IC Role / Device Role / Timing Role: Real-time signal processor running from RAM in Low-power Run mode, triggering ADC sampling on comparator threshold breach. Use Value: 12-bit ADC at 10 ksps and 7-channel DMA offload CPU during acquisition; 20 KB SRAM accommodates 2 kB FFT buffer + firmware. |
| Medical Wearable Patch | Asset Tracking Tag |
|
Use Scenario: ECG patch with dry-electrode sensing, motion artifact compensation, and Bluetooth LE periodic telemetry. IC Role / Device Role / Timing Role: Analog front-end controller handling ADC oversampling, comparator-based R-peak detection, and adaptive power mode switching. Use Value: Dual comparators operate down to 1.65 V and wake CPU from Stop mode in <1 µs - captures cardiac events without continuous ADC polling. |
Use Scenario: GPS-less indoor asset tracker using RSSI triangulation, ambient light sensing, and NFC tap-to-wake. IC Role / Device Role / Timing Role: System-on-chip managing multi-sensor fusion, NFC field detection (via comparator), and scheduled BLE advertising bursts. Use Value: 78 I/Os (5V tolerant) interface directly to photodiode, NFC antenna matching network, and external flash; 96-bit UID enables secure device identity binding. |
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 pinout; adds AES-128 hardware crypto engine and TRNG - no additional Flash/RAM. | Required where firmware signing, secure boot, or encrypted sensor data transmission is mandated (e.g., medical Class II devices). | Select when cryptographic acceleration justifies minor cost increase and no extra memory is needed. |
| STM32L031K4T6 | Smaller footprint (LQFP32), lower resources: 16 KB Flash, 8 KB SRAM, no EEPROM, single comparator, no USB/ISO7816. | Suitable for simpler sensor endpoints with basic timing and no persistent data logging (e.g., temperature-only beacons). | Choose for cost-sensitive, functionally minimal designs where EEPROM and dual comparators are unnecessary. |
Compared with STM32L071KBT6TR, STM32L072KBT6 adds security features without compromising power or pin compatibility, while STM32L031K4T6 reduces cost and size at the expense of EEPROM, ADC channels, and wakeup flexibility - making it viable only for stripped-down sensing tasks.
Availability
STM32L071KBT6TR is available at Aetrix Electronics and suitable for smart utility metering, wireless sensor nodes, medical wearable patches, and asset tracking tags requiring stable component supply across extended product lifecycles.
Supply support for STM32L071KBT6TR 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, sensors, and analog products for industrial, automotive, and consumer markets.
The STM32L0 series targets ultra-low-power embedded applications demanding extended battery life, robust analog integration, and secure firmware execution - optimized for metering, wearables, and IoT edge nodes.
FAQ
What is the maximum operating frequency and corresponding power consumption in Run mode?
The STM32L071KBT6TR operates up to 32 MHz with dynamic voltage scaling. At 32 MHz and 3.3 V, typical Run mode current is 93 µA/MHz (≈3.0 mA total). With code executing from Flash and peripherals active, measured current is 3.2 mA; from RAM, it drops to 2.8 mA due to eliminated Flash wait states.
Does this MCU support hardware encryption or secure boot features?
No - the STM32L071KBT6TR lacks dedicated cryptographic accelerators (AES, PKA) and secure boot ROM. Security relies on software-based implementations or external secure elements. For hardware crypto, consider the pin-compatible STM32L072KBT6, which integrates AES-128 and TRNG.
Can the 6 KB EEPROM be used for storing calibration coefficients or device-specific parameters?
Yes - the 6 KB data EEPROM is designed for frequent read/write operations (100k cycles, 20-year data retention at 55 °C) and supports byte/word/quad-word writes. It is accessed via dedicated PEC (Program/Erase Controller) registers and protected by write-protection sectors, making it ideal for factory calibration data and field-updated configuration.
What debug interface does STM32L071KBT6TR support, and what tools are compatible?
The MCU supports Serial Wire Debug (SWD) via dedicated SWDIO and SWCLK pins - a 2-pin ARM CoreSight interface. Compatible tools include ST-LINK/V2-1 (on Nucleo boards), SEGGER J-Link, and PyOCD. No JTAG header is required, reducing PCB layout complexity and cost.
STM32L071KBT6TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 32-LQFP
- Series:
- STM32L0
- Packaging:
- Tape & Reel (TR)
- 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:
STM32L071KBT6TR FAQ
1.How can I place an order for STM32L071KBT6TR through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L071KBT6TR 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 STM32L071KBT6TR reliable?
The price and inventory of STM32L071KBT6TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L071KBT6TR is usually 5 days.
3.What payment methods are accepted for STM32L071KBT6TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L071KBT6TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L071KBT6TR?
STM32L071KBT6TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L071KBT6TR 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 STM32L071KBT6TR?
For technical support, including STM32L071KBT6TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L071KBT6TR requirements.
6.How does Aetrix verify that STM32L071KBT6TR is sourced from the original manufacturer or authorized distributors?
All STM32L071KBT6TR 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 STM32L071KBT6TR meets industry standards.
7.What is the process for return or replacement of STM32L071KBT6TR?
All STM32L071KBT6TR units undergo pre-shipment inspection (PSI). If there is an issue with STM32L071KBT6TR, 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 STM32L071KBT6TR part is unused and in its original packaging.
Return procedure for STM32L071KBT6TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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