STMicroelectronics STM32L071RZH6TR

Overview

STM32L071RZH6TR 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 temperature operation. Used in battery-powered IoT sensor nodes requiring long runtime and RTC-backed data logging.

For engineers reviewing the STM32L071RZH6TR datasheet, STM32L071RZH6TR pinout, STM32L071RZH6TR application, or STM32L071RZH6TR equivalent, key selection criteria include standby current (0.29 µA), EEPROM endurance (100k cycles), 78 I/Os with 5V tolerance, and integrated SW-DP debug interface for low-power firmware development.

Technical Context

The STM32L071RZH6TR implements a dual-bank Flash architecture with ECC and read-while-write capability, enabling seamless firmware updates without halting execution. Its power management includes five low-power modes-Run, Sleep, Low-power Run, Low-power Sleep, Stop, and Standby-with dedicated wakeup sources including RTC alarm, comparator output, and 16 external lines.

Clock system integration includes multiple internal oscillators (HSI16, LSI, MSI) and external support for 1–25 MHz HSE and 32 kHz LSE, with PLL for CPU clock scaling. The interconnect matrix enables concurrent peripheral access to memory and buses without arbitration stalls.

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 STM32L072RZT6 and STM32L083RZT6, the STM32L071RZH6TR provides optimal balance of ultra-low-power operation, EEPROM persistence, and I/O flexibility for cost-sensitive, battery-limited applications where crypto or display are unnecessary.

Availability

STM32L071RZH6TR is available at Aetrix Electronics and suitable for smart utility metering, wireless sensor nodes, portable medical devices, and asset tracking tags requiring stable component supply and long-term industrial lifecycle support.

Supply support for STM32L071RZH6TR 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, MEMS, and automotive-grade components since 1987.

The STM32L0 series targets ultra-low-power embedded applications demanding extended battery life, robust EEPROM data retention, and industrial temperature resilience - optimized for IoT edge nodes and energy-harvesting systems.

FAQ

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

The STM32L071RZH6TR operates 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 under VDD = 3.3 V and TA = 25 °C.

Does this MCU support hardware encryption or secure boot features?

No - the STM32L071RZH6TR does not integrate hardware AES, PKA, or secure boot ROM. It relies on software-based cryptography libraries. For hardware-accelerated security, ST recommends the STM32L072xx or STM32L082xx variants with dedicated crypto peripherals.

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 20-year data retention at 55 °C (DS10690 Rev 7 Section 6.3.9). It is accessed via dedicated PEC (Program/Erase Controller) and protected by ECC, making it ideal for factory-trimmed sensor offsets and user-configurable thresholds.

Is the LQFP64 package of STM32L071RZH6TR compatible with reflow soldering per JEDEC J-STD-020?

Yes - the LQFP64 package (10 × 10 mm, 0.5 mm pitch) is qualified for standard Pb-free reflow profiles per JEDEC J-STD-020D. Peak temperature must not exceed 260 °C for ≤60 seconds; moisture sensitivity level is MSL3, requiring bake-out if exposed >168 hours at ambient conditions.