STMicroelectronics STM32L071VBT6TR

Overview

STM32L071VBT6TR from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M0+ microcontroller in LQFP100 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 industrial sensors and portable medical devices requiring long runtime and RTC-backed data logging.

For engineers reviewing the STM32L071VBT6TR datasheet, STM32L071VBT6TR pinout, STM32L071VBT6TR application, or STM32L071VBT6TR equivalent, key selection criteria include standby current (0.29 µA), 78 5V-tolerant I/Os, dual ultra-low-power comparators with wake-up capability, and integrated bootloader supporting USART/I²C/SPI programming.

Technical Context

The STM32L071VBT6TR implements a single-core Arm Cortex-M0+ with Memory Protection Unit (MPU), operating at up to 32 MHz via internal 16 MHz HSI (±1%) or external crystal (1–25 MHz). 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) thresholds.

Analog subsystem integration includes a 12-bit ADC with 16 channels, two independent ultra-low-power comparators (operable down to 1.65 V), temperature sensor, and internal voltage reference (VREFINT). Digital peripherals feature 7-channel DMA, 11 timers (including RTC, SysTick, LPTIM, and watchdogs), and 10 communication interfaces: 4x USART (2 ISO 7816/IrDA), 1x LPUART, up to 6x SPI (16 Mbit/s), and 3x I²C (2 with SMBus/PMBus).

Key Specifications

Pinout & Package

LQFP100 package: 100-pin, 14 mm × 14 mm, 0.5 mm pitch, exposed thermal pad (EPAD), standard JEDEC footprint. Compatible with reflow soldering per IPC/JEDEC J-STD-020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L072VBT6, the STM32L071VBT6TR omits crypto accelerators but retains identical low-power performance and analog capabilities - ideal for cost-sensitive, non-secure sensing. Against STM32L082KBU6, it provides 3× more Flash and 3× more I/Os in a larger LQFP100 footprint - suited for scalable, feature-rich edge nodes.

Availability

STM32L071VBT6TR is available at Aetrix Electronics and suitable for industrial sensor nodes, portable medical monitors, smart utility meters, and asset tracking beacons requiring stable component supply across extended product lifecycles.

Supply support for STM32L071VBT6TR 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 components for industrial, automotive, and consumer markets.

The STM32L0 series targets ultra-low-power embedded applications demanding sub-µA standby, robust analog integration, and long-term reliability in harsh environments - optimized for battery-operated edge intelligence.

FAQ

What is the maximum operating frequency and core type of the STM32L071VBT6TR?

The STM32L071VBT6TR uses an Arm Cortex-M0+ core with Memory Protection Unit (MPU), capable of running at up to 32 MHz. This frequency is achievable using the internal 16 MHz HSI oscillator with PLL multiplication or an external crystal up to 25 MHz. The core delivers 0.95 DMIPS/MHz, enabling efficient real-time processing in ultra-low-power constraints.

Does the STM32L071VBT6TR support 5V-tolerant I/Os, and how many are available?

Yes, the STM32L071VBT6TR supports 5V-tolerant I/Os on 78 of its 84 GPIO pins. These pins safely accept 5 V logic levels even when the device is powered from 1.8 V to 3.3 V, eliminating external level shifters when interfacing with legacy 5 V peripherals such as sensors, displays, or industrial I/O modules.

What are the lowest power consumption modes and their typical current draw?

The lowest power mode is Standby, drawing 0.29 µA with three wakeup pins enabled. Stop mode with RTC and 20 KB RAM retention consumes 0.86 µA. Both modes retain critical register states and allow fast wake-up (5 µs from Flash). These values are measured at 25 °C with VDD = 3.3 V and all clocks gated except RTC and LSE.

Is there factory-programmed firmware or bootloader support on the STM32L071VBT6TR?

Yes, the STM32L071VBT6TR includes a factory-programmed ROM-based bootloader supporting UART, I²C, and SPI interfaces. This enables in-system programming without a debugger, facilitating field firmware updates and reducing production test complexity. Boot mode selection is controlled via BOOT0 and BOOT1 pins.