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STMicroelectronics · STM32L

STM32L431KBU3

IC MCU 32BIT 128KB FLSH 32UFQFPN

STM32-first sourcing with STMicroelectronics support components. Review recorded cores, flash, RAM, connectivity and package facts before moving an approved design into production.

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STM32L431KBU3 component illustration
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STM32L431KBU3 specifications

Recorded source facts. Missing values are kept explicit; verify the exact manufacturer document before design approval.

ManufacturerSTMicroelectronics
Ordering codeSTM32L431KBU3
FamilySTM32L
Package32-UFQFN Exposed Pad
Product StatusActive
DigiKey ProgrammableNot Verified
Core ProcessorARM® Cortex®-M4
Core Size32-Bit Single-Core
Speed80MHz
ConnectivityCANbus, I²C, IrDA, LINbus, QSPI, SAI, SPI, SWPMI, UART/USART
PeripheralsBrown-out Detect/Reset, DMA, PWM, WDT
Number of I/O26
Program Memory Size128KB (128K x 8)
Program Memory TypeFLASH
EEPROM SizeNot provided in source
RAM Size64K x 8
Voltage - Supply (Vcc/Vdd)1.71V ~ 3.6V
Data ConvertersA/D 10x12b; D/A 2x12b
Oscillator TypeInternal
Operating Temperature-40°C ~ 125°C (TA)
Mounting TypeSurface Mount
Package / Case32-UFQFN Exposed Pad
Supplier Device Package32-UFQFPN (5x5)

Documents and evidence

STM32L431KBU3 ↗

Catalog sources

www.ic-components.com · STM32L431KBU3 ↗

Source directory identity match; source detail pending. Specifications remain from existing catalog.

Before sourcing STM32L431KBU3

  1. Identify the firmware and board baseline
  2. Check flash, RAM and required peripherals
  3. Review pin assignment and supply limits
  4. Keep the full temperature and package suffix
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