STMicroelectronics STM32L071V8T6TR

Overview

STM32L071V8T6TR from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M0+ microcontroller in LQFP64 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 runtime and RTC-backed data logging.

For engineers reviewing the STM32L071V8T6TR datasheet, STM32L071V8T6TR pinout, STM32L071V8T6TR application, or STM32L071V8T6TR equivalent, key selection criteria include standby current (0.29 µA), 5 µs Flash wakeup time, 78 5V-tolerant I/Os, and integrated ultra-low-power comparators with wake-up capability down to 1.65 V.

Technical Context

The device implements a dual-bank Flash architecture with read-while-write capability and hardware ECC for both Flash and EEPROM, enabling robust firmware updates and nonvolatile data storage in field-deployed edge devices. Its power management includes five BOR thresholds, programmable voltage detector (PVD), and dynamic voltage scaling to optimize active and low-power mode efficiency.

Clock system integrates multiple oscillators: 1–25 MHz HSE, 32 kHz LSE for RTC calibration, 16 MHz factory-trimmed HSI16 (±1%), and multispeed MSI (65 kHz–4.2 MHz), all feeding a configurable PLL for CPU clock generation up to 32 MHz. Peripheral interconnect uses a dedicated AHB/APB matrix supporting concurrent DMA transfers to ADC, USART, SPI, and timers.

Key Specifications

Pinout & Package

LQFP64 (10 × 10 mm, 0.5 mm pitch) package with exposed thermal pad (ECOPACK2-compliant). Pin count: 64 leads; 58 general-purpose I/Os (including 72 total I/Os across variants, with 78 usable on full-pin-count packages).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L071V8T6TR, STM32L072V8T6TR adds security accelerators at no power penalty, while STM32L071K8T6TR trades I/O count and memory for compactness-enabling tiered design reuse across product families without requalification.

Availability

STM32L071V8T6TR is available at Aetrix Electronics and suitable for smart metering, wearable medical devices, industrial sensor nodes, and asset tracking beacons requiring stable component supply across extended product lifecycles.

Supply support for STM32L071V8T6TR 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 Access line targets ultra-low-power embedded applications demanding extended battery life, wide temperature operation, and robust memory integrity-optimized for IoT endpoints, portable diagnostics, and energy-harvesting systems.

FAQ

What is the maximum operating frequency and corresponding power consumption in Run mode?

The STM32L071V8T6TR operates up to 32 MHz with 0.95 DMIPS/MHz performance. At 32 MHz and 3.3 V, typical Run mode current is 93 µA/MHz (≈3.0 mA total), measured with code executing from Flash and peripherals active. This value scales linearly with clock frequency and decreases in Low-power Run mode using dynamic voltage scaling.

Does this MCU support hardware encryption or secure boot features?

No, the STM32L071V8T6TR does not include hardware AES, DES, or TRNG engines. Secure boot relies on software-implemented checksum validation in the pre-programmed ROM bootloader. For hardware-accelerated cryptography, consider the pin-compatible STM32L072V8T6TR, which adds AES-128 and TRNG without increasing power or footprint.

Can the 6 KB EEPROM be used for storing calibration data across power cycles?

Yes, the 6 KB data EEPROM supports 10,000 write/erase cycles and guarantees 20-year data retention at 85 °C. It includes hardware ECC for single-bit error correction and double-bit error detection, making it suitable for storing sensor calibration coefficients, device IDs, or configuration parameters that must survive frequent power cycling and extended field deployment.

What debug interface is supported, and what pins are required?

The device supports Serial Wire Debug (SW-DP) using SWCLK and SWDIO pins (PA14 and PA13 by default), plus optional SWO for trace output. Only two dedicated pins are required-no JTAG header needed-reducing PCB layout complexity and preserving I/Os for application use while enabling full breakpoint, register, and memory access during development and field diagnostics.