STMicroelectronics STM32L011F4U3TR

Overview

STM32L011F4U3TR 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 targets battery-powered sensor nodes and smart meters.

For engineers reviewing the STM32L011F4U3TR datasheet, STM32L011F4U3TR pinout, STM32L011F4U3TR application, or STM32L011F4U3TR equivalent, key selection factors include standby current (0.23 µA), RTC-enabled stop mode (0.54 µA), 5 µs Flash wakeup, 23 I/Os (5V tolerant), and integrated ECC for Flash/EEPROM reliability.

Technical Context

The device implements a single-core Arm Cortex-M0+ running up to 32 MHz with 0.95 DMIPS/MHz performance and dynamic voltage scaling. Its clock system integrates factory-trimmed 16 MHz HSI (±1%), 37 kHz LSI, 65 kHz–4.2 MHz MSI, 32 kHz LSE for RTC, and PLL for CPU clock generation.

Power management includes five BOR thresholds, programmable voltage detector (PVD), and three low-power modes: Stop (0.29 µA), Stop+RTC+RAM retention (0.54 µA), and Standby (0.23 µA with two wakeup pins). Analog subsystem comprises one 12-bit ADC (10 channels, 1.14 Msps), two comparators with window mode and wake-up capability down to 1.65 V, and internal temperature sensor.

Key Specifications

Pinout & Package

STM32L011F4U3TR uses the UFQFPN20 (3 × 3 mm, 0.5 mm pitch) package with 20 terminals. This compact, leadless package supports automated assembly and offers excellent thermal performance for space-constrained IoT endpoints.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L011F4U3TR, STM32L031F4P6 adds analog peripherals at the cost of larger TSSOP packaging, while EFM32ZG108F16 achieves lower sleep current but requires external nonvolatile memory - making STM32L011F4U3TR optimal for cost-sensitive, self-contained, ultra-low-power sensing with integrated EEPROM.

Availability

STM32L011F4U3TR 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 manufacturability.

Supply support for STM32L011F4U3TR 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 demanding multi-year battery life, robust memory integrity, and rich analog integration - optimized for IoT edge nodes and energy-harvesting systems.

FAQ

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

The STM32L011F4U3TR runs up to 32 MHz with dynamic voltage scaling. At 32 MHz and 3.3 V, typical Run mode current is 76 µA/MHz (≈2.43 mA total). With code executing from RAM, current drops to ~1.8 mA due to eliminated Flash wait states - verified in Section 6.3.4 of DocID027973 Rev 5.

Does this MCU support hardware encryption or secure boot features?

No. The STM32L011F4U3TR does not integrate hardware cryptographic accelerators (AES, SHA, PKA) or secure boot ROM. Security relies on software-implemented algorithms and external secure elements. For certified secure boot, consider STM32L5 or STM32U5 series MCUs with TrustZone and embedded root-of-trust.

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 across voltage and temperature, enabling reliable system clock operation without external crystal or runtime calibration - confirmed in Table 38 of the datasheet (DocID027973 Rev 5).

How many I/O pins support analog functions like ADC or comparator inputs?

Ten I/O pins (PA0–PA7, PB0–PB1) support ADC1_INx channels; PA1 and PA2 serve as COMP1/COMP2 inputs respectively. All ADC-capable pins operate down to 1.65 V supply, enabling direct sensor interfacing without external biasing - detailed in Section 3.10 and Table 13 of the datasheet.