STMicroelectronics STM32L431KBU6TR

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Product attributes Property Value
Manufacturer STMicroelectronics
Product Series STM32L4
Packaging Cut Tape (CT) | Tape & Reel (TR)
Core Processor ARM® Cortex®-M4
Core Size 32-Bit Single-Core
Speed 80MHz
Connectivity CANbus, I2C, IrDA, LINbus, QSPI, SAI, SPI, SWPMI, UART/USART
Peripherals Brown-out Detect/Reset, DMA, PWM, WDT
Number of I/O 26
Program Memory Size 128KB (128K x 8)
Program Memory Type FLASH
EEPROM Size -
RAM Size 64K x 8
Voltage - Supply (Vcc/Vdd) 1.71V ~ 3.6V
Data Converters A/D 10x12b; D/A 2x12b
Oscillator Type Internal
Operating Temperature -40°C ~ 85°C (TA)
Grade -
Qualification AEC -
Mounting Type Surface Mount
Supplier Device Package 32-UFQFPN (5x5)
Package / Case 32-UFQFN Exposed Pad
ROHS RoHS Compliant - Hazardous Substance Free Electronic Components | HQICKEY

The STM32L431KBU6TR is an 80MHz ARM Cortex-M4 MCU with 128KB flash and 64KB RAM. It operates from 1.71V to 3.6V in a 32-UFQFN package. Features include DMA, PWM, and brown-out reset, ideal for low-power embedded applications.

  • Ultra-low voltage (1.71V) enables battery operation.
  • 80MHz Cortex-M4 for DSP-class performance.
  • DMA offloads CPU for real-time tasks.
  • Compact UFQFN package for space-constrained designs.

IoT Edge Nodes

Low power (1.71V) and DMA enable efficient sensor data aggregation.

Wearable Devices

UFQFN package saves space; 80MHz Cortex-M4 handles complex algorithms.

Smart Meters

128KB flash supports logging; PWM drives metering pulses.

Medical Monitors

Reliable brown-out detection ensures safe operation.

Portable Instruments

Low voltage operation extends battery life.

Motor Control

PWM and DMA allow smooth waveform generation.

Q: What core does it use?
A: ARM Cortex-M4.
Q: What is the max clock speed?
A: 80MHz.
Q: How much flash and RAM?
A: 128KB flash and 64KB RAM.
Q: What is the voltage range?
A: 1.71V to 3.6V.
Base Product Number : STM32L431KB
128KB Flash 32-bit MCU 64KB RAM 80MHz ARM Cortex-M4 DMA IoT PWM UFQFN-32 Wearable
Q: What core does it use?
A: ARM Cortex-M4.
Q: What is the max clock speed?
A: 80MHz.
Q: How much flash and RAM?
A: 128KB flash and 64KB RAM.
Q: What is the voltage range?
A: 1.71V to 3.6V.