STMicroelectronics STM32L011G3U7

Overview

STM32L011G3U7 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 STM32L011G3U7 datasheet, STM32L011G3U7 pinout, STM32L011G3U7 application, or STM32L011G3U7 equivalent, key selection criteria include standby current (0.23 µA), RTC-enabled Stop mode (0.54 µA), 5 µs Flash wakeup time, and 23 I/Os with 5V tolerance - all critical for energy-constrained embedded designs requiring long-term autonomy and robust peripheral integration.

Technical Context

The STM32L011G3U7 integrates a Cortex-M0+ core running up to 32 MHz with dynamic voltage scaling, supported by multiple clock sources: 16 MHz factory-trimmed HSI (±1%), 32 kHz LSE for RTC calibration, and a multispeed MSI (65 kHz–4.2 MHz). Its low-power architecture includes five operational modes - Run, Sleep, Low-power Run, Stop, and Standby - each with distinct power/performance trade-offs validated down to 1.65 V supply.

Peripheral interconnect is managed via an AHB/APB matrix supporting concurrent DMA transfers across ADC, USART, SPI, I²C, and timers. The device embeds a 96-bit unique ID, CRC calculation unit, and serial wire debug (SW-DP), enabling secure firmware updates and traceable production programming without external debug hardware.

Key Specifications

Pinout & Package

STM32L011G3U7 uses the UFQFPN20 (3 × 3 mm, 0.5 mm pitch) package - a space-constrained, thermally efficient solution for compact PCB layouts in wearables and sensor nodes. Pin assignments are validated per ST's DocID027973 Rev 5, Section 4 (Pin descriptions).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L031K3T6 and EFM32ZG108F16, the STM32L011G3U7 uniquely balances ultra-low standby current (0.23 µA), on-chip EEPROM with ECC, 5V-tolerant I/Os, and RTC-anchored Stop mode - making it optimal for compact, self-contained, maintenance-free sensor endpoints where reliability and minimal external components are mandatory.

Availability

STM32L011G3U7 is available at Aetrix Electronics and suitable for smart utility metering, wireless sensor nodes, industrial predictive maintenance, and medical wearable patches requiring stable component supply, long-lifecycle assurance, and consistent parametric performance across temperature and voltage ranges.

Supply support for STM32L011G3U7 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 devices for industrial, automotive, and consumer markets.

The STM32L0 series targets ultra-low-power embedded applications - optimized for battery-operated devices demanding multi-year autonomy, robust analog integration, and certified security features without sacrificing development ecosystem maturity.

FAQ

What is the maximum operating frequency of the STM32L011G3U7?

The STM32L011G3U7 runs at up to 32 MHz using its internal 16 MHz HSI oscillator with PLL multiplication or external clock sources. Frequency scaling is dynamically adjusted via voltage regulator settings to maintain stability across 1.65–3.6 V supply range, with documented performance of 0.95 DMIPS/MHz at full speed.

Does the STM32L011G3U7 support hardware encryption?

No, the STM32L011G3U7 does not integrate hardware cryptographic accelerators (AES, SHA, PKA). It relies on software libraries for encryption tasks. For secure boot or key storage, developers must implement trusted execution environments using its write-protected Flash sectors and 96-bit unique ID - but no dedicated crypto engine is present.

Can the internal 32 kHz LSE oscillator be calibrated for improved RTC accuracy?

Yes, the LSE oscillator supports digital calibration via the RCC_BDCR register's CAL[4:0] bits, allowing ±128 ppm fine-tuning of the 32.768 kHz RTC clock. Calibration values can be stored in backup registers or EEPROM and applied at startup to achieve <±1 ppm drift over temperature when paired with a high-stability external crystal.

How many I/O pins support 5V tolerance on the STM32L011G3U7?

23 of the 28 I/O pins on the STM32L011G3U7 are 5V tolerant (all PA and PB pins except PA11, PA12, PA13, PA14, PA15, PB0, PB1). This allows direct interfacing with 5V logic peripherals such as legacy sensors, displays, or level translators without external buffers - confirmed in Section 3.7 and Table 50 of the datasheet.