STMicroelectronics STM32L011G3U6TR

Overview

STM32L011G3U6TR from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M0+ microcontroller in UFQFPN20 (3×3 mm) package, featuring 16 KB Flash, 2 KB SRAM, 512 B EEPROM with ECC, 12-bit ADC (1.14 Msps), and dual ultra-low-power comparators. It operates from 1.65–3.6 V across –40 to +125 °C and delivers 76 µA/MHz in Run mode - ideal for battery-powered IoT sensors and smart metering endpoints.

For engineers reviewing the STM32L011G3U6TR datasheet, STM32L011G3U6TR pinout, STM32L011G3U6TR application, or STM32L011G3U6TR equivalent, key selection criteria include standby current (0.23 µA), RTC-enabled Stop mode (0.54 µA), 5 µs Flash wakeup, 23 5V-tolerant I/Os, and integrated voltage detector with 5 BOR thresholds.

Technical Context

This MCU implements a single-core Arm Cortex-M0+ running at up to 32 MHz with 0.95 DMIPS/MHz performance. Its power architecture integrates dynamic voltage scaling, multiple low-power modes (Standby, Stop, Sleep), and dedicated regulators enabling sub-µA retention states while preserving 2 KB RAM and RTC functionality.

The clock system combines factory-trimmed 16 MHz HSI (±1%), 37 kHz LSI, 65 kHz–4.2 MHz MSI, 32 kHz LSE for RTC calibration, and a PLL for CPU clock generation. Analog subsystem includes two independent comparators with window mode and wake-up capability down to 1.65 V, plus a temperature sensor and internal voltage reference (VREFINT).

Key Specifications

Pinout & Package

STM32L011G3U6TR uses the UFQFPN20 (3 × 3 mm, 0.5 mm pitch) package with 20 terminals. This compact, lead-free ECOPACK®2-compliant package supports reflow soldering and suits space-constrained portable designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L011G3U6TR, STM32L011K3U6 offers expanded I/O and timer resources in a larger footprint, while STM32L021F3P6 trades EEPROM for double Flash and added op-amps - making each optimal for distinct trade-offs between memory, analog capability, and package size.

Availability

STM32L011G3U6TR is available at Aetrix Electronics and suitable for smart utility metering, wireless sensor nodes, industrial predictive maintenance, and medical wearable monitors requiring stable component supply and long-term manufacturability.

Supply support for STM32L011G3U6TR 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 semiconductors.

The STM32L0 series targets ultra-low-power embedded applications, emphasizing energy efficiency, integrated analog peripherals, and robustness for battery-operated and energy-harvesting systems.

FAQ

Does STM32L011G3U6TR support USB connectivity?

No, STM32L011G3U6TR does not include a USB peripheral. It provides USART, LPUART, SPI, and I²C interfaces only. For USB-capable variants in the same ultra-low-power family, consider STM32L053 or STM32L073 series, which integrate USB 2.0 FS controllers.

What is the maximum operating frequency with internal RC oscillators?

The internal 16 MHz HSI oscillator is factory-trimmed to ±1% accuracy and supports full-speed operation up to 32 MHz when used with the PLL. The MSI oscillator ranges from 65 kHz to 4.2 MHz and is intended for low-power clocking without external components.

Can the 512 B EEPROM be used for storing calibration data across power cycles?

Yes, the 512 B data EEPROM supports read/write endurance of 100,000 cycles and data retention of 20 years at 85 °C. It includes hardware ECC, making it suitable for storing sensor calibration coefficients, device IDs, or configuration parameters that must survive repeated power cycling.

Is SWD debug supported on all pins of the UFQFPN20 package?

SWD debug is supported exclusively on PA13 (SWDIO) and PA14 (SWCLK) - both exposed on the UFQFPN20 package. These pins are dedicated to Serial Wire Debug and cannot be reassigned to other functions while debugging is active.