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STMicroelectronics STM32L422KBU6 — Microcontrollers & Processors (MCU / MPU / DSP)

STM32L422KBU6 STM32L4 ARM Cortex-M4 MCU, 80 MHz

MPNSTM32L422KBU6
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STMicroelectronics STM32L4 series STM32L422KBU6, ARM Cortex-M4 32-bit MCU, 80 MHz, 128 KB Flash, 40K x 8 RAM, 26 I/O, I²C/SPI/UART/USB/Quad SPI, 1.71V-3.6V, -40°C-85°C, 32-UFQFPN (5x5 mm), Tray.

$5.7300Ref. price · indicative, final on quote
STMicroelectronics STM32L422KBU6 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

STM32L422KBU6 specifications
ParameterValue
SeriesSTM32L4
MountingSurface Mount
Oscillator typeInternal
Program memory typeFLASH
Voltage - supply (Vcc (Vdd))1.71V ~ 3.6V
Operating temperature-40°C~85°C(TA)
Speed80MHz
PackageTray
RAM size40K x 8
Core size32-Bit Single-Core
PeripheralsBrown-out Detect/Reset, DMA, PWM, WDT
ConnectivityI²C, Infrared, IrDA, LINbus, Quad SPI, SPI, UART/USART, USB
Number of i (O)26
Core processorARM® Cortex®-M4
Case32-UFQFN Exposed Pad
Data convertersA/D 10x12b
Program memory size128KB (128K x 8)

Product details

The 32-UFQFPN package (5x5 mm) with exposed pad fits tight PCB layouts in portable or industrial sensor nodes.

The 26 available GPIOs, combined with DMA, a PWM timer, brown-out detection, and a watchdog, cover most sensor-fusion or motor-control feedback tasks without an external companion chip.

It is not qualified for automotive under-hood (125°C) or extended military environments, but the wide supply tolerance and low-power sleep modes make it a strong fit for field-deployed edge nodes that see seasonal temperature swings.

For new designs, this means no supply-chain risk from a looming EOL.

Frequently asked questions

Is STM32L422KBU6 equivalent to STM32L422KBT6?

The STM32L422KBT6 is the same die in a different package — the KBT6 suffix indicates a 32-LQFP (7x7 mm) package, while the KBU6 uses a 32-UFQFPN (5x5 mm). Core specs (80 MHz, 128 KB Flash, 40K x 8 RAM, peripherals) are identical. The choice is footprint and board area: the UFQFPN saves 24 mm² but requires a reflow profile suited to the exposed pad.