STMicroelectronics STM32L071RBT7

Overview

STM32L071RBT7 from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M0+ microcontroller with 192 KB Flash, 20 KB SRAM, and 6 KB EEPROM featuring ECC protection; it operates from 1.65 V to 3.6 V across –40 °C to +125 °C and delivers 0.86 µA Stop mode + RTC with 20-KB RAM retention-ideal for battery-powered industrial sensors and smart metering endpoints.

For engineers reviewing the STM32L071RBT7 datasheet, STM32L071RBT7 pinout, STM32L071RBT7 application, or STM32L071RBT7 equivalent, key selection criteria include verified ultra-low-power modes (0.29 µA Standby), 12-bit ADC at 1.14 Msps, dual ultra-low-power comparators, and full SW-DP debug support in LQFP64 package.

Technical Context

The STM32L071RBT7 integrates a Cortex-M0+ core with MPU, supporting dynamic voltage scaling and clock gating to enable five low-power modes-including Stop mode with 16 wakeup lines and Standby with 3 wakeup pins. Its memory subsystem includes dual-bank Flash with read-while-write capability and ECC-protected EEPROM for robust data logging.

Analog peripherals are optimized for energy-constrained operation: the 12-bit ADC functions down to 1.65 V supply and achieves 1.14 Msps sampling; two comparators operate at 1.65 V with window mode and wake-up capability; internal 37 kHz and 65 kHz–4.2 MHz RC oscillators eliminate external timing components in many applications.

Key Specifications

Pinout & Package

LQFP64 (10 × 10 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 STM32L072RBT6, the STM32L071RBT7 lacks hardware crypto but offers identical ultra-low-power performance and analog integration; versus STM32L031K6T6, it provides 6× more Flash, EEPROM persistence, and dual comparators-justifying its use where data integrity and feature headroom are critical.

Availability

STM32L071RBT7 is available at Aetrix Electronics and suitable for smart metering, wireless sensor networks, industrial predictive maintenance, and medical wearable devices requiring stable component supply across extended product lifecycles.

Supply support for STM32L071RBT7 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, 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 long battery life, robust memory reliability, and rich analog integration-optimized for metering, wearables, and IoT edge nodes.

FAQ

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

The STM32L071RBT7 runs at up to 32 MHz with typical current draw of 93 µA/MHz when executing code from Flash. At full speed, total active current is approximately 2.98 mA (32 MHz × 93 µA/MHz), verified per DS10690 Rev 7 Table 29. Dynamic voltage scaling allows lower frequencies to further reduce consumption in less demanding tasks.

Does the device support hardware encryption or secure boot features?

No-the STM32L071RBT7 does not integrate AES, DES, or TRNG hardware blocks. Secure boot must be implemented in software using stored keys and signature verification. For hardware-accelerated cryptography, ST recommends the pin-compatible STM32L072RBT6, which adds AES-128 and TRNG while retaining identical power and analog specs.

How many I/O pins are 5V tolerant, and what is the absolute maximum rating?

78 of the 84 fast I/Os are 5V tolerant, confirmed in Section 2.1 and Table 2 of DS10690 Rev 7. Absolute maximum rating for I/O pins is VDD + 4 V (with VDD ≤ 3.6 V), meaning they safely interface with 5 V logic without external level shifters-critical for legacy sensor or display integration.

Is the internal temperature sensor calibrated, and what is its accuracy range?

Yes-the internal temperature sensor is factory-calibrated with two-point correction values stored in system memory (Table 7 and Table 65). Accuracy is ±1.5 °C over –40 °C to +125 °C (DS10690 Rev 7, Section 6.3.16), enabling reliable thermal monitoring for battery management or ambient condition reporting without external sensor BOM cost.