STMicroelectronics STM32L071RBH6TR

Overview

STM32L071RBH6TR from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M0+ microcontroller with 192 KB Flash, 20 KB SRAM, 6 KB EEPROM, 12-bit ADC (1.14 Msps), and operating voltage range of 1.65–3.6 V. It delivers 0.95 DMIPS/MHz performance at up to 32 MHz and supports -40 to +125 °C industrial operation. Used in battery-powered sensor nodes requiring long-term RTC operation and analog sensing.

For engineers reviewing the STM32L071RBH6TR datasheet, STM32L071RBH6TR pinout, STM32L071RBH6TR application, or STM32L071RBH6TR equivalent, key selection criteria include standby current (0.29 µA), EEPROM endurance (100k cycles), 78 I/Os (5V tolerant), ultra-low-power comparators with wake-up capability, and dual-bank Flash with ECC for robust firmware updates.

Technical Context

The STM32L071RBH6TR integrates a Cortex-M0+ core with Memory Protection Unit (MPU), supporting dynamic voltage scaling across three power ranges. Its interconnect matrix enables concurrent peripheral access without CPU intervention, critical for deterministic low-power scheduling.

It implements five low-power modes-Run, Sleep, Low-power Run, Low-power Sleep, Stop, and Standby-with hardware-assisted wakeup via 16 lines or 3 pins. The embedded 32 kHz RTC oscillator includes calibration registers, and the 16 MHz HSI16 RC oscillator is factory-trimmed to ±1% accuracy.

Key Specifications

Pinout & Package

LQFP64 (10 × 10 mm, 0.5 mm pitch) package with exposed thermal pad (ECOPACK2-compliant). RoHS-compliant, halogen-free, and qualified for industrial temperature range (-40 to +125 °C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L071RBH6TR, STM32L072RBH6 adds cryptographic acceleration at identical power/performance, while STM32L071CBT6 trades I/O count and package size for cost reduction - both retain full software compatibility within the STM32L0x line.

Availability

STM32L071RBH6TR is available at Aetrix Electronics and suitable for smart utility metering, wearable health monitoring, industrial sensor nodes, and asset tracking beacons requiring stable component supply across extended product lifecycles.

Supply support for STM32L071RBH6TR 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 analog devices for industrial, automotive, and consumer markets.

The STM32L0 Access line targets ultra-low-power embedded applications demanding extended battery life, robust memory integrity, and rich analog integration - optimized for cost-sensitive, high-volume IoT endpoints.

FAQ

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

The STM32L071RBH6TR operates up to 32 MHz with dynamic voltage scaling. 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 idle. This value scales linearly with clock frequency and supply voltage per datasheet Table 29.

Does this MCU support hardware-accelerated cryptography?

No, the STM32L071RBH6TR does not include dedicated cryptographic accelerators. It lacks AES, DES, SHA, or TRNG blocks. For hardware crypto, consider the pin-compatible STM32L072RBH6, which integrates AES-128 and TRNG while maintaining identical Flash, RAM, and peripheral configuration.

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

72 of the 78 GPIOs are 5V tolerant (all except PA11, PA12, PA13, PA14, PA15, and PB12). Absolute maximum I/O voltage is VDD + 4 V (with VDD ≥ 2.0 V), per datasheet Section 6.3.13. This allows direct interfacing with 5V logic without external level shifters in mixed-voltage systems.

What is the endurance and data retention specification for the embedded EEPROM?

The 6 KB data EEPROM supports 100,000 write/erase cycles and guarantees data retention for 20 years at 85 °C or 40 years at 25 °C, as specified in datasheet Table 52. ECC protection ensures single-bit error correction and double-bit error detection during all read/write operations.