STMicroelectronics STM32L021F4U6TR

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Product attributes Property Value
Manufacturer STMicroelectronics
Product Series STM32L0
Packaging Cut Tape (CT) | Tape & Reel (TR)
Core Processor ARM® Cortex®-M0+
Core Size 32-Bit Single-Core
Speed 32MHz
Connectivity I2C, IrDA, SPI, UART/USART
Peripherals Brown-out Detect/Reset, DMA, POR, PWM, WDT
Number of I/O 16
Program Memory Size 16KB (16K x 8)
Program Memory Type FLASH
EEPROM Size 512 x 8
RAM Size 2K x 8
Voltage - Supply (Vcc/Vdd) 1.65V ~ 3.6V
Data Converters A/D 7x12b
Oscillator Type Internal
Operating Temperature -40°C ~ 85°C (TA)
Grade -
Qualification AEC -
Mounting Type Surface Mount
Supplier Device Package 20-UFQFPN (3x3)
Package / Case 20-UFQFN
ROHS RoHS Compliant - Hazardous Substance Free Electronic Components | HQICKEY

The STM32L021F4U6TR from STMicroelectronics is an ultra-low-power 32-bit MCU based on the ARM Cortex-M0+ core. It runs at 32MHz and offers 16KB Flash and 2KB RAM. With a supply range of 1.65V to 3.6V and a compact 20-UFQFN package, it is designed for battery-powered and space-constrained applications.

  • Ultra-Low Power: 1.65V operation extends battery life in portable devices.
  • ARM Cortex-M0+ Core: Efficient 32-bit processing at 32MHz.
  • Compact UFQFN Package: Ideal for miniaturized designs.
  • Integrated DMA: Improves peripheral data throughput without CPU overhead.

Wearable Fitness Trackers

The 1.65V minimum supply and 32MHz Cortex-M0+ core allow for ultra-low-power operation while processing accelerometer data in real time.

Smart Sensors

With 16KB Flash and DMA, it can buffer data from multiple I2C/SPI sensors and wake the main core only when needed, saving power.

Portable Medical Devices

Its small UFQFN package and 85°C rating make it suitable for compact glucose meters or digital thermometers.

Industrial Actuators

PWM and WDT features enable reliable control of small valves or pumps in factory automation.

Consumer Electronics

Ideal for TV remote controls or smart home buttons, where low standby current and quick wake-up are critical.

Battery Management

Can monitor cell voltages and control balancing circuits in small Li-ion packs, using its analog peripherals and low-power modes.

Q: What is the core of the STM32L021F4U6TR?
A: It uses an ARM Cortex-M0+ core running at 32MHz.
Q: What is the supply voltage range?
A: It operates from 1.65V to 3.6V.
Q: How much Flash memory is available?
A: It has 16KB of Flash memory.
Q: What package does it come in?
A: It is available in a 20-pin UFQFN package.
Q: Does it support DMA?
A: Yes, it includes a DMA controller.
Base Product Number : STM32L021F4
16KB Flash 2KB RAM 32-bit MCU 32MHz ARM Cortex-M0+ DMA IoT STM32L0 UFQFN-20 ultra-low-power wearable
Q: What is the core of the STM32L021F4U6TR?
A: It uses an ARM Cortex-M0+ core running at 32MHz.
Q: What is the supply voltage range?
A: It operates from 1.65V to 3.6V.
Q: How much Flash memory is available?
A: It has 16KB of Flash memory.
Q: What package does it come in?
A: It is available in a 20-pin UFQFN package.
Q: Does it support DMA?
A: Yes, it includes a DMA controller.