STM32L011F3U6TR

Product Overview

The STM32L011F3U6TR is an ultra-low-power 32-bit microcontroller from STMicroelectronics’ STM32L0 series. Based on the Arm® Cortex®-M0+ processor running at up to 32 MHz, it integrates 8 KB of Flash memory, 2 KB of SRAM, 512 bytes of data EEPROM, a 12-bit analog-to-digital converter, two ultra-low-power comparators, and multiple timers and communication interfaces. Its compact UFQFPN-20 package and low-power operating modes make it suitable for battery-powered electronics, sensor interfaces, embedded monitoring, and cost-sensitive control applications. The TR ordering variant is supplied on tape and reel.

Key Features

• Arm Cortex-M0+ 32-bit processor, up to 32 MHz

• 8 KB embedded Flash memory with ECC

• 2 KB SRAM

• 512 bytes of data EEPROM with ECC

• 12-bit ADC with hardware oversampling

• Two ultra-low-power comparators

• Five-channel DMA controller

• USART, low-power UART, SPI, and I²C interfaces

• General-purpose timers and low-power timer

• Real-time clock and watchdog timers

• Sleep, Stop, and Standby modes

• Hardware CRC calculation unit

• 96-bit unique device identification

• Compact UFQFPN-20 package

• Tape-and-reel packaging for automated assembly

Technical Specifications

Processor & Architecture

The STM32L011F3U6TR uses the Arm Cortex-M0+ 32-bit RISC core, designed for efficient processing in energy-conscious embedded systems. Operating at up to 32 MHz, it supports interrupt-driven firmware, sensor monitoring, timing operations, and general-purpose control logic.

Its integrated memory and peripheral architecture helps reduce external component requirements in compact PCB designs.

Memory & Storage

• 8 KB Flash memory with ECC for program storage

• 2 KB SRAM for runtime data and application variables

• 512 bytes of data EEPROM with ECC for nonvolatile parameters

• 20-byte backup register

• Flash sector protection features

• 96-bit unique device identification

These resources support compact firmware, configuration storage, and runtime data processing.

Analog Peripherals

• 12-bit ADC with hardware oversampling

• Up to 10 ADC channels, depending on configuration

• Two ultra-low-power comparators

• Comparator window mode and wake-up capability

These integrated analog functions support sensor measurement, voltage monitoring, threshold detection, and other low-power measurement applications.

Timer & PWM Resources

The STM32L011F3U6TR provides timing resources for embedded control and event handling:

• General-purpose 16-bit timers

• Ultra-low-power timer

• Real-time clock

• SysTick timer

• Independent watchdog

• Window watchdog

Supported timer channels can be used for event counting, timing measurement, pulse generation, and PWM functions where available.

Communication & Connectivity

• USART with support for features such as ISO 7816 and IrDA

• Low-power UART

• SPI interface

• I²C interface with SMBus/PMBus support

• Preprogrammed bootloader supporting USART and SPI

• Serial-wire debugging

These interfaces enable communication with sensors, external memory, host controllers, and other embedded peripherals.

Clock & Power Management

The microcontroller supports internal and external clock sources to balance performance and power consumption, including an internal high-speed RC oscillator, low-power internal oscillators, external clock support, and a PLL for CPU clock generation.

Integrated power-on reset, power-down reset, brownout reset, and programmable voltage detection support controlled startup and supply monitoring.

Low-Power Operation

The STM32L011F3U6TR is designed for applications where energy efficiency is a key requirement. It supports several low-power operating modes:

• Sleep mode for reduced CPU activity

• Stop mode for lower-power operation

• Standby mode for deeper power reduction

• Configurable wake-up sources

• Real-time clock and selected state-retention options

ST specifies typical Stop-mode current as low as 0.29 µA under stated conditions. Actual consumption depends on configuration, supply voltage, temperature, and enabled peripherals.

Power Management

The device operates from a 1.65–3.6 V supply. Integrated reset circuitry, voltage monitoring, and configurable clock sources support reliable operation in compact embedded systems. Multiple low-power modes allow developers to balance responsiveness and energy consumption.

Security & Data Integrity

• Flash memory ECC support

• Data EEPROM ECC support

• Hardware CRC calculation unit

• 96-bit unique device identification

• Flash sector read/write protection

• Serial-wire debugging support

These features support data-integrity checks, device identification, and firmware protection. Advanced cryptographic acceleration should not be assumed for this device.

Development & Debugging

The STM32L011F3U6TR supports serial-wire debugging and a preprogrammed bootloader for supported serial interfaces. Developers can use compatible STM32 development tools and software resources to develop, program, test, and maintain embedded firmware.

Its integrated analog and timing peripherals provide a practical foundation for compact, low-power applications.

Applications

• Battery-powered sensor nodes

• Low-power data loggers

• Smart meters and monitoring devices

• Portable electronic instruments

• Sensor and threshold-detection circuits

• Home automation accessories

• Industrial monitoring equipment

• Compact consumer electronics

• Low-power control boards

• Energy-conscious embedded peripherals

Benefits

• Low-power 32-bit processing at up to 32 MHz

• Integrated Flash, SRAM, and data EEPROM

• ADC and comparators for sensor applications

• Serial communication interfaces

• Compact 3 × 3 mm package

• Reduced need for external analog and timing components

• Multiple low-power operating modes

• Tape-and-reel packaging for automated manufacturing

Packaging & Ordering Information

• Part Number: STM32L011F3U6TR

• Manufacturer: STMicroelectronics

• Device Family: STM32L0 series

• 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 +85°C

• Product Status: Active, in volume production

• Grade: Industrial

• RoHS: ECOPACK2

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 STM32L011F3U6TR Datasheet

Frequently Asked Questions

What is the maximum operating frequency of STM32L011F3U6TR?

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

How much memory does STM32L011F3U6TR have?

It integrates 8 KB Flash, 2 KB SRAM, and 512 bytes of data EEPROM.

What package does STM32L011F3U6TR use?

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

Does STM32L011F3U6TR include an ADC?

Yes. It integrates a 12-bit ADC with hardware oversampling and up to 10 channels, depending on configuration.

What is the supply voltage range?

The specified supply voltage range is 1.65–3.6 V.

What does the TR suffix mean?

The TR suffix identifies the tape-and-reel ordering variant.

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