STMicroelectronics STM32L072RBH6

Overview

STM32L072RBH6 from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M0+ microcontroller with 192 KB Flash, 20 KB SRAM, and 6 KB EEPROM, operating from 1.65 V to 3.6 V across –40 °C to +125 °C. It integrates USB 2.0 (crystal-less), dual 12-bit DACs, 12-bit ADC (1.14 Msps), two ultra-low-power comparators, and capacitive touch sensing-designed for battery-powered IoT sensor nodes requiring long runtime and analog signal conditioning.

For engineers reviewing the STM32L072RBH6 datasheet, STM32L072RBH6 pinout, STM32L072RBH6 application, or STM32L072RBH6 equivalent, key selection criteria include standby current (0.29 µA), 5 µs Flash wakeup time, USB crystal-less operation, 78 5V-tolerant I/Os, and integrated 6 KB EEPROM with ECC for robust data logging in energy-constrained edge devices.

Technical Context

The STM32L072RBH6 implements a dual-bank Flash architecture with read-while-write capability and ECC protection, enabling safe firmware updates without halting execution. Its clock system combines factory-trimmed 16 MHz HSI (+/–1%), self-calibrating 48 MHz HSI48 for USB, and low-power 37 kHz LSI-supporting dynamic voltage scaling and multiple low-power modes including Stop mode with RTC + 20 KB RAM retention at 0.86 µA.

Analog subsystem integration includes two independent 12-bit DACs with output buffers (operable down to 1.8 V), a 12-bit ADC with up to 16 channels and 1.14 Msps sampling (down to 1.65 V), and two window-mode comparators with wake-up capability-enabling closed-loop control and precision sensor interface without external components.

Key Specifications

Pinout & Package

STM32L072RBH6 is housed in a 64-pin LQFP package (10 × 10 mm, 0.5 mm pitch), RoHS-compliant and ECOPACK2 certified. Pin functions are validated per ST's DS10689 Rev 5, Table 16 (STM32L072xxx pin definition).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L073RBT6, STM32L072RBH6 omits LCD support but maintains identical low-power specs and peripheral set-making it optimal for non-display sensor nodes. Versus STM32L432KCU6, it trades CPU performance for significantly lower standby current and integrated crystal-less USB, better suiting energy-harvesting or coin-cell applications.

Availability

STM32L072RBH6 is available at Aetrix Electronics and suitable for smart utility meters, wearable health monitors, industrial sensor nodes, and USB-C power monitors requiring stable component supply and long-term manufacturability.

Supply support for STM32L072RBH6 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 products for industrial, automotive, and consumer markets.

The STM32L0 series targets ultra-low-power embedded applications, emphasizing energy efficiency, integrated analog peripherals, and secure firmware execution-optimized for battery-operated and energy-harvesting systems where runtime and component count are critical.

FAQ

What is the maximum operating frequency and core type of the STM32L072RBH6?

The STM32L072RBH6 features an Arm Cortex-M0+ core rated for up to 32 MHz operation, delivering 0.95 DMIPS/MHz. It supports dynamic voltage scaling to maintain performance across supply voltages from 1.65 V to 3.6 V, with factory-trimmed 16 MHz HSI oscillator accuracy of ±1% and self-calibrating 48 MHz HSI48 for USB timing.

Does the STM32L072RBH6 support crystal-less USB operation?

Yes, the STM32L072RBH6 integrates a self-calibrating 48 MHz HSI48 oscillator synchronized to the USB Start-of-Frame (SOF) token, enabling full-speed USB 2.0 communication without an external crystal or load capacitors-reducing BOM cost and PCB area while maintaining ±0.25% frequency accuracy over temperature and voltage.

How much EEPROM is available, and what protection does it offer?

The STM32L072RBH6 includes 6 KB of embedded data EEPROM with built-in ECC (error-correcting code), supporting >300,000 write/erase cycles and data retention exceeding 20 years at 85 °C. This memory is accessible via standard HAL drivers and used for storing calibration values, device identifiers, or user configuration without external serial EEPROM.

What low-power modes are supported, and what are their typical current draws?

The STM32L072RBH6 supports six low-power modes: Sleep (56 µA/MHz), Low-power Run (113 µA at 32 kHz), Low-power Sleep (2.2 µA), Stop (0.43 µA without RTC, 0.86 µA with RTC + 20 KB RAM retention), and Standby (0.29 µA with 3 wakeup pins). All modes retain register and SRAM content except Standby, and wakeup latency ranges from 5 µs (Flash) to 10 µs (RAM).