STMicroelectronics STM32L071RBT6

Overview

STM32L071RBT6 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 78 5V-tolerant I/Os - deployed in battery-powered industrial sensors and portable medical monitors requiring long runtime and robust analog integration.

For engineers reviewing the STM32L071RBT6 datasheet, STM32L071RBT6 pinout, STM32L071RBT6 application, or STM32L071RBT6 equivalent, key selection criteria include standby current (0.29 µA), RTC + RAM retention in Stop mode (0.86 µA), 5 µs Flash wakeup time, and dual ultra-low-power comparators with wake-up capability down to 1.65 V.

Technical Context

The STM32L071RBT6 integrates a Cortex-M0+ core with Memory Protection Unit (MPU), supporting dynamic voltage scaling and clock gating for fine-grained power control across Run, Sleep, Stop, and Standby modes. Its interconnect matrix enables concurrent peripheral access without CPU arbitration overhead.

It features a multi-source clock system: HSE (1–25 MHz), LSE (32 kHz RTC), factory-trimmed 16 MHz HSI, and programmable MSI (65 kHz–4.2 MHz), plus PLL for CPU clock generation. All memories - Flash, SRAM, and EEPROM - include ECC protection and sector write-protection logic.

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 STM32L071RBT6, the STM32L072RBT6 adds security primitives without increasing power or size, while the STM32L031K6T6 trades memory, analog capability, and EEPROM for lower unit cost and smaller board area - enabling tiered design reuse across product families.

Availability

STM32L071RBT6 is available at Aetrix Electronics and suitable for battery-powered industrial sensors, portable medical monitors, and wireless asset trackers requiring stable component supply and long-term production continuity.

Supply support for STM32L071RBT6 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 products for industrial, automotive, and consumer markets.

The STM32L0 series targets ultra-low-power embedded applications demanding extended battery life, integrated analog, and robust operation across wide temperature ranges - optimized for energy harvesting and maintenance-free deployments.

FAQ

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

The STM32L071RBT6 operates up to 32 MHz. At 32 MHz with code executing from Flash, typical current consumption is 93 µA/MHz (≈3.0 mA total), measured at 3.0 V and 25 °C per DS10690 Rev 7 Section 6.3.4. Dynamic voltage scaling allows lower VDD at reduced frequencies to further cut power.

Does the device support hardware encryption or secure boot?

No. The STM32L071RBT6 lacks dedicated cryptographic accelerators or secure boot ROM. For hardware AES or secure firmware validation, consider the pin-compatible STM32L072RBT6, which integrates AES-128 and TRNG - both parts share identical power, timing, and peripheral specifications.

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

Yes. The 6 KB data EEPROM supports 100,000 write/erase cycles and 40-year data retention at 55 °C (DS10690 Rev 7 Table 52). It is accessed via dedicated PEC (Program/Erase Controller) registers and protected by ECC - ideal for storing sensor offsets, RTC calibration, or device-specific configuration.

What debug interfaces are supported, and is JTAG available?

Only Serial Wire Debug (SWD) is supported - a 2-pin interface (SWDIO and SWCLK) compliant with ARM CoreSight. JTAG is not implemented on this device. SWD enables full flash programming, breakpoint setting, and real-time variable inspection using standard ST-LINK/V2 or compatible debug probes.