STMicroelectronics STM32L071VBT6

Overview

STM32L071VBT6 from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M0+ microcontroller in LQFP100 package, featuring 192 KB Flash with ECC, 20 KB SRAM, 6 KB EEPROM, 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 industrial sensor nodes requiring long battery life and robust analog integration.

For engineers reviewing the STM32L071VBT6 datasheet, STM32L071VBT6 pinout, STM32L071VBT6 application, or STM32L071VBT6 equivalent, key selection criteria include standby current (0.29 µA), RTC-enabled Stop mode (0.86 µA), 78 5V-tolerant I/Os, dual ultra-low-power comparators, and integrated bootloader supporting USART/I²C/SPI.

Technical Context

The STM32L071VBT6 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 RTC), MSI (65 kHz–4.2 MHz), and PLL for CPU scaling. Its interconnect matrix enables concurrent peripheral access without bus contention.

Ultra-low-power operation is achieved via five low-power modes (Run, Sleep, Low-power Run, Low-power Sleep, Stop, Standby), dynamic voltage scaling, and hardware-accelerated peripherals including 7-channel DMA, CRC unit, and 96-bit unique ID. All memories support ECC (Flash, EEPROM) and sector protection against unauthorized R/W.

Key Specifications

Pinout & Package

LQFP100 (14 × 14 mm, 0.5 mm pitch), RoHS-compliant ECOPACK2 package with exposed thermal pad.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-low-power MCU applications.

Compared with STM32L072VBT6, the STM32L071VBT6 lacks hardware crypto but offers identical analog/peripheral integration and lower unit cost; versus STM32L053R8T6, it provides triple Flash capacity, EEPROM, and 27 additional I/Os-critical for complex HMI or multi-sensor fusion designs.

Availability

STM32L071VBT6 is available at Aetrix Electronics and suitable for smart utility metering, wireless sensor nodes, and industrial control panels requiring stable component supply, long-term lifecycle assurance, and full traceability through ST's qualified manufacturing lines.

Supply support for STM32L071VBT6 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, 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 certified functional safety features-designed specifically for metering, wearables, and energy-harvesting systems.

FAQ

What is the maximum operating frequency and core type of the STM32L071VBT6?

The STM32L071VBT6 uses an Arm Cortex-M0+ core with Memory Protection Unit (MPU) and operates at up to 32 MHz. Its performance is rated at 0.95 DMIPS/MHz, verified across the full temperature range (–40 °C to +125 °C) and supply voltage (1.65 V to 3.6 V). The core supports Thumb-2 instruction set and hardware divide.

Does the STM32L071VBT6 support hardware encryption or secure boot?

No, the STM32L071VBT6 does not include hardware AES, DES, or TRNG blocks. Secure boot relies on software-implemented signature verification using the embedded CRC unit and protected Flash sectors. For certified cryptographic operations, ST recommends the STM32L072VBT6 or STM32L4 series.

How many I/O pins are 5V tolerant, and what is the maximum pin count for this part?

The STM32L071VBT6 has 78 5V-tolerant I/O pins out of its total 84 fast I/Os. It is packaged in LQFP100, providing 100 pins including power, ground, and dedicated function pins (e.g., NRST, BOOT0, VREF+, VREF–). Pin compatibility is maintained across LQFP100 variants in the STM32L071xx family.

What are the supported debug interfaces and required connections?

The STM32L071VBT6 supports Serial Wire Debug (SWD) using SWCLK and SWDIO pins (PA14/PA13), requiring only two signals plus ground for full debug visibility, flash programming, and real-time tracing. JTAG is not supported. No external pull-ups are needed-the internal debug circuitry includes weak pull-ups on both lines.