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

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
STM32L422KBU6 datasheet
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Specifications

STM32L422KBU6 Technical Specifications
ParameterValue
SeriesSTM32L4
Mounting typeSurface 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.

Peripheral set and connectivity

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. An internal oscillator keeps the BOM short, though an external crystal can be used when tighter timing is needed.

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.

Lifecycle and sourcing

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.