STM32L011F4U3TR

Product Overview

The STM32L011F4U3TR is an ultra-low-power 32-bit microcontroller from STMicroelectronics' STM32L0 series, based on the Arm Cortex-M0+ processor operating at up to 32 MHz. It integrates 16 KB of Flash memory, 2 KB of SRAM, and 512 bytes of data EEPROM in a compact UFQFPN-20 package.

Designed for energy-efficient embedded applications, the STM32L011F4U3TR combines low-power operation, integrated analog peripherals, flexible timers, and serial communication interfaces. Its extended operating temperature range of -40°C to +125°C makes it suitable for industrial control, sensor interfaces, portable equipment, and battery-powered embedded systems.

Key Features

• 32-bit Arm Cortex-M0+ processor

• CPU frequency up to 32 MHz

• 16 KB embedded Flash memory

• 2 KB SRAM

• 512 bytes of data EEPROM

• 12-bit ADC with hardware oversampling

• Two ultra-low-power comparators

• One SPI interface

• One USART interface

• Three general-purpose 16-bit timers

• One low-power timer

• Real-time clock (RTC)

• Five-channel DMA controller

• Memory protection unit (MPU)

• Multiple low-power operating modes

• 1.65–3.6 V supply voltage

• Extended operating temperature up to +125°C

• UFQFPN-20 package measuring 3 × 3 × 0.6 mm

• Tape-and-reel packaging

• ECOPACK2 compliant

Technical Specifications

Processor & Architecture

The STM32L011F4U3TR features an Arm Cortex-M0+ 32-bit RISC processor operating at up to 32 MHz. Its architecture is optimized for low-power embedded control while providing sufficient performance for simple monitoring, sensing, and automation tasks.

An integrated memory protection unit supports controlled memory access, while flexible clock configuration enables developers to balance processing performance and energy consumption.

Memory & Storage

The device integrates memory resources for firmware, runtime variables, and persistent application data.

• 16 KB embedded Flash memory

• 2 KB SRAM for runtime data and buffers

• 512 bytes of data EEPROM for nonvolatile configuration storage

This memory configuration is suited to compact firmware applications that do not require large program or data storage capacity.

Analog Peripherals

The STM32L011F4U3TR integrates analog peripherals for sensor measurement and basic control applications.

• One 12-bit ADC

• Hardware ADC oversampling

• Up to 10 ADC input channels at family level, subject to device and pin configuration

• Two ultra-low-power comparators

These peripherals support applications such as battery monitoring, environmental sensing, and low-power measurement.

Timer & PWM Resources

The device includes timing resources for periodic tasks, pulse generation, and event monitoring.

• Three general-purpose 16-bit timers

• One low-power timer

• Real-time clock with alarm and wake-up functionality

• SysTick system timer

• Watchdog timer resources

The available timer channels and functions depend on the peripheral configuration and package pin assignments.

Communication & Connectivity

The STM32L011F4U3TR provides serial interfaces for communication with sensors, external devices, and other embedded controllers.

• One SPI interface

• One USART interface

• Serial communication support for compatible peripheral devices

The available interface selection and pin mapping should be checked against the official datasheet during hardware design.

Clock & Power Management

The device provides flexible clock sources and integrated power-management functions for energy-efficient applications.

• Internal high-speed clock source

• Internal low-speed clock source

• External clock-source support where applicable

• Configurable system and peripheral clocks

• Power-on and power-down reset

• Programmable voltage detection

• Supply voltage range of 1.65–3.6 V

These features help designers optimize clocking and power consumption for low-duty-cycle embedded systems.

Low-Power Operation

The STM32L011F4U3TR is designed for applications where energy efficiency is a primary requirement.

• Sleep mode

• Low-power operating modes

• Low-power timer functionality

• RTC-based wake-up support

• Flexible peripheral and clock control

These capabilities are useful for battery-powered sensors, remote monitoring devices, and compact industrial electronics.

Power Management

Integrated power-control features support reliable operation across the specified supply range.

• Supply voltage from 1.65 V to 3.6 V

• Power-on reset

• Power-down reset

• Programmable voltage detector

• Low-power operating modes

For battery-life calculations and power-supply design, refer to the official datasheet for current consumption, startup requirements, and operating-mode limitations.

Security & Data Integrity

The STM32L011F4U3TR includes features that support software reliability and data integrity.

• Memory protection unit

• Flash readout protection

• CRC calculation unit

• Unique device identification

• Watchdog resources for system monitoring

These features provide basic protection and diagnostic capabilities for embedded firmware and application data.

Development & Debugging

The STM32L011F4U3TR is supported by the STM32 development ecosystem.

• Serial Wire Debug (SWD)

• STM32Cube development tools

• Compatible STM32 programming and debugging tools

• Embedded C/C++ development support

• Manufacturer datasheets and application documentation

Developers should verify programming-tool and firmware-library compatibility with the selected hardware design.

Applications

The STM32L011F4U3TR is suitable for low-power embedded applications, including:

• Battery-powered sensors

• Industrial monitoring

• Simple control systems

• Environmental sensing

• Smart meters and data loggers

• Home and building automation

• Portable electronic devices

• Low-power consumer electronics

• Remote monitoring equipment

• General-purpose embedded controllers

Benefits

• Low-power processing: Cortex-M0+ architecture designed for energy-efficient embedded control.

• Compact memory configuration: 16 KB Flash, 2 KB SRAM, and 512 bytes of EEPROM.

• Integrated analog resources: ADC and comparators reduce the need for external components in suitable designs.

• Small footprint: UFQFPN-20 package measuring just 3 × 3 mm.

• Extended temperature range: Supports operation up to +125°C.

• Flexible development: Supported by STMicroelectronics' STM32 development ecosystem.

Packaging & Ordering Information

• Part Number: STM32L011F4U3TR

• Manufacturer: STMicroelectronics

• Device Family: STM32L0 Ultra-Low-Power Microcontrollers

• Package: UFQFPN-20

• Package Code: UFQFPN20

• Package Size: 3 × 3 × 0.6 mm

• Packing Type: Tape and reel

• Supply Voltage: 1.65–3.6 V

• Operating Temperature: -40°C to +125°C

• Product Status: Active, in volume production

• Grade: Industrial

• RoHS: ECOPACK2 compliant

Datasheet

For complete electrical characteristics, pin configuration, memory architecture, ADC specifications, timer configuration, communication interfaces, absolute maximum ratings, and application information, please refer to the official STMicroelectronics documentation.

Datasheet: Official STM32L011F4U3TR Datasheet

Frequently Asked Questions

What is the maximum operating frequency of the STM32L011F4U3TR?

The Arm Cortex-M0+ processor operates at up to 32 MHz.

How much Flash memory does the STM32L011F4U3TR have?

It provides 16 KB of embedded Flash memory, 2 KB of SRAM, and 512 bytes of data EEPROM.

What package does the STM32L011F4U3TR use?

It uses a UFQFPN-20 package measuring 3 × 3 × 0.6 mm.

What is the operating voltage range?

The specified supply voltage range is 1.65–3.6 V.

What is the operating temperature range?

The STM32L011F4U3TR is specified for operation from -40°C to +125°C.

What does the TR suffix mean?

The TR suffix indicates tape-and-reel packaging for automated component assembly.

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