STMicroelectronics STM32L071VZT6

Overview

STM32L071VZT6 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 down to 1.65 V. It delivers 0.95 DMIPS/MHz performance at up to 32 MHz and supports 84 fast I/Os (78 5V-tolerant), making it suitable for battery-powered industrial sensors and portable medical devices requiring long runtime and robust analog integration.

For engineers reviewing the STM32L071VZT6 datasheet, STM32L071VZT6 pinout, STM32L071VZT6 application, or STM32L071VZT6 equivalent, key selection considerations include its 0.29 µA Standby current, dual ultra-low-power comparators with wake-up capability, RTC + 20-KB RAM retention in Stop mode, and support for ISO 7816/IRDA on two USARTs - critical for secure, low-energy edge node design.

Technical Context

The STM32L071VZT6 integrates a Cortex-M0+ core with Memory Protection Unit (MPU), dynamic voltage scaling across three power ranges (1.65–3.6 V), and a multi-source clock system including HSI16 (±1%), LSE (32 kHz RTC), and PLL for CPU frequency synthesis. 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/Sleep, Stop, Standby), each with configurable wakeup sources - including 16 Stop-mode wakeup lines and 3 Standby-mode pins - and hardware-accelerated features like CRC unit and 96-bit unique ID for firmware integrity and device authentication.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L072VZT6, the STM32L071VZT6 trades hardware crypto for lower BOM cost and identical ultra-low-power behavior; versus STM32L431VCT6, it prioritizes energy efficiency and EEPROM integration over raw processing throughput - making it optimal for long-life, resource-constrained endpoints.

Availability

STM32L071VZT6 is available at Aetrix Electronics and suitable for smart utility metering, portable medical sensors, industrial wireless sensor nodes, and secure access control terminals requiring stable component supply across multi-year production cycles.

Supply support for STM32L071VZT6 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 automotive semiconductors since 1987.

The STM32L0 series targets ultra-low-power embedded applications - optimized for battery-operated devices where energy efficiency, integrated analog, and secure firmware update capability are primary design drivers.

FAQ

What is the maximum operating frequency and corresponding power supply range for STM32L071VZT6?

The STM32L071VZT6 operates up to 32 MHz when supplied between 2.4 V and 3.6 V (Voltage Range 1). At 1.65–2.4 V (Voltage Range 2), maximum frequency is reduced to 16 MHz to maintain timing margins and stability. This dynamic voltage scaling is managed automatically by the internal regulator and reflected in the PWR_CR register settings.

Does STM32L071VZT6 support hardware-based AES encryption?

No, the STM32L071VZT6 does not include a hardware AES engine. That feature is present only in the STM32L072 and STM32L082 variants. The L071 relies on software AES libraries or external crypto ICs for encrypted communication - confirmed by absence of AES registers in RM0377 reference manual and exclusion from DS10690 feature tables.

How many I/O pins are 5V tolerant, and which packages support them?

78 of the 84 GPIOs on STM32L071VZT6 are 5V tolerant, including all pins in the LQFP100 package except VDDA, VREF+, and analog inputs. This tolerance applies regardless of VDD voltage (1.65–3.6 V) and is validated per IEC 61000-4-2 Level 4 ESD testing - enabling direct interfacing with legacy 5V logic without level shifters.

What boot modes are supported, and how is the bootloader accessed?

STM32L071VZT6 supports three boot modes: main Flash memory (BOOT0 = 0), system memory (BOOT0 = 1, NRST toggled), and SRAM (BOOT0 = 1, NRST held low during reset). The factory-programmed bootloader resides in system memory and supports USART1/2/3, I2C1, and SPI2 via predefined pin mappings - activated without external programmer, enabling field firmware recovery over standard interfaces.