STMicroelectronics STM32L011G4U6TR

Overview

STM32L011G4U6TR 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 sensor nodes and smart metering endpoints.

For engineers reviewing the STM32L011G4U6TR datasheet, STM32L011G4U6TR pinout, STM32L011G4U6TR application, or STM32L011G4U6TR equivalent, key selection criteria include standby current (0.23 µA), RTC-enabled Stop mode (0.54 µA), 5 µs Flash wakeup time, 23 I/Os (5V-tolerant), and integrated voltage detector with 5 BOR thresholds.

Technical Context

This MCU implements a tightly coupled Arm Cortex-M0+ core running at up to 32 MHz, supported by multiple clock sources: factory-trimmed 16 MHz HSI (±1%), 32 kHz LSE for RTC, and multispeed MSI (65 kHz–4.2 MHz). Its power architecture includes dynamic voltage scaling and five low-power modes - Standby, Stop, Low-power Run, Sleep, and Run - each with distinct peripheral retention and wakeup latency profiles.

The device integrates a 7-channel DMA controller servicing ADC, USART, SPI, I2C, and timers; a CRC calculation unit; and serial wire debug (SW-DP). Analog subsystem includes a 10-channel 12-bit ADC (down to 1.65 V supply), two comparators with window mode and wake-up capability, and internal temperature sensor with calibration data stored in system memory.

Key Specifications

Pinout & Package

STM32L011G4U6TR 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 is optimized for space-constrained portable electronics.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L011G4U6TR, STM32L031F6P6 trades 5V-tolerant I/Os and LPUART for double Flash/RAM, while EFM32ZG222F32 achieves lower standby current but requires external nonvolatile storage and reference calibration - making STM32L011G4U6TR optimal for compact, self-contained, battery-critical edge nodes.

Availability

STM32L011G4U6TR is available at Aetrix Electronics and suitable for smart metering, wireless sensor networks, portable medical devices, and asset tracking tags requiring stable component supply across extended product lifecycles.

Supply support for STM32L011G4U6TR 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 automotive semiconductors since 1987.

The STM32L0 series targets ultra-low-power embedded applications, emphasizing energy efficiency, integrated analog peripherals, and long-life battery operation - specifically engineered for IoT edge nodes and energy-harvesting systems.

FAQ

What is the minimum supply voltage for ADC operation on STM32L011G4U6TR?

The 12-bit ADC functions down to 1.65 V supply voltage, enabling direct interface with single-cell Li-ion (2.7–4.2 V) or alkaline batteries without intermediate regulation. This is confirmed in Section 6.3.15 of the datasheet (DocID027973 Rev 5), where ADC accuracy and sampling rate are specified across the full 1.65–3.6 V range.

Does STM32L011G4U6TR support hardware encryption or secure boot?

No - STM32L011G4U6TR does not integrate hardware cryptographic accelerators or secure boot ROM. It lacks AES, PKA, or TRNG blocks found in STM32L4/L5 series. Secure firmware updates must rely on software-based signing verification and external secure elements if required.

Can the internal 16 MHz RC oscillator be used as the system clock without calibration?

Yes - the HSI16 oscillator is factory-trimmed to ±1% accuracy at 25 °C and 3.3 V, and maintains ±2% over full temperature/voltage range. No runtime calibration is needed for most timing-critical peripherals like USART or SPI, though RTC still requires LSE for accuracy.

How many I/O pins support external interrupt (EXTI) capability?

All 28 I/Os support external interrupt capability via EXTI lines - specifically, PA0–PA15, PB0–PB10, and PC13 (though PC13 is not present on G4 variant). For STM32L011G4U6TR (UFQFPN20), 20 GPIOs are physically available, and all support EXTI configuration through SYSCFG_EXTICR registers.