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STM32L422KBT6

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STMicroelectronics Microcontrollers (MCU/MPU/SOC), LQFP-32(7x7). Pinout checked against ST's open pin data, KiCad symbol/footprint/3D.

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STM32L422KBT6

STMicroelectronics · Microcontrollers (MCU/MPU/SOC) · LQFP-32(7x7)

STM32L422KBT6 from STMicroelectronics, in a LQFP-32(7x7). Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model, then checked against ST open pin data); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 VDD power_in Main power supply pin, 1.71 V to 3.6 V.
2 PC14 bidirectional 32 kHz oscillator input (OSC32_IN) or general-purpose I/O, 5V tolerant.
3 PC15 bidirectional 32 kHz oscillator output (OSC32_OUT) or general-purpose I/O, 5V tolerant.
4 NRST bidirectional External reset input with embedded weak pull-up resistor, bidirectional reset pin.
5 VDDA power_in Analog power supply and positive reference voltage (VREF+), 1.62 V to 3.6 V when ADC/COMP used.
6 PA0 bidirectional General-purpose I/O with clock input capability (CK_IN), 5V tolerant with analog switch function, ADC channel input.
7 PA1 bidirectional General-purpose I/O, 5V tolerant with analog switch function, supports TIM2/I2C1/SPI1/USART2/TIM15 alternate functions, ADC channel input.
8 PA2 bidirectional General-purpose I/O, 5V tolerant with analog switch function, supports TIM2/USART2/LPUART1/QUADSPI alternate functions, ADC channel input.
9 PA3 bidirectional General-purpose I/O, 3.6V supply tolerant with analog switch function, supports TIM2/USART2/LPUART1/QUADSPI alternate functions, OPAMP1 output.
10 PA4 bidirectional General-purpose I/O, 3.6V supply tolerant with analog switch function, supports SPI1/USART2/LPTIM2 alternate functions, ADC channel input.
11 PA5 bidirectional General-purpose I/O, 3.6V supply tolerant with analog switch function, supports TIM2/SPI1/LPTIM2 alternate functions, ADC channel input.
12 PA6 bidirectional General-purpose I/O, 5V tolerant with analog switch function, supports TIM1/SPI1/COMP1/USART3/LPUART1/QUADSPI/TIM16 alternate functions, ADC channel input.
13 PA7 bidirectional General-purpose I/O, 5V tolerant with FM+ I2C and analog switch function, supports TIM1/I2C3/SPI1/QUADSPI alternate functions, ADC channel input.
14 PB0 bidirectional General-purpose I/O, 5V tolerant with analog switch function, supports TIM1/SPI1/USART3/QUADSPI/TIM16 alternate functions, ADC channel input.
15 PB1 bidirectional General-purpose I/O, 5V tolerant with analog switch function, supports TIM1/USART3/LPUART1/QUADSPI/LPTIM2 alternate functions, ADC channel input.
16 VSS power_in Ground (reference potential for digital circuits).
17 VDD power_in Main power supply pin, 1.71 V to 3.6 V.
18 PA8 bidirectional General-purpose I/O, 5V tolerant, supports MCO/TIM1/USART1/LPTIM2 alternate functions.
19 PA9 bidirectional General-purpose I/O, 5V tolerant with FM+ I2C capability, supports TIM1/I2C1/USART1/TIM15 alternate functions.
20 PA10 bidirectional General-purpose I/O, 5V tolerant with FM+ I2C capability, supports TIM1/I2C1/USART1/USB alternate functions.
21 PA11 bidirectional General-purpose I/O, 5V tolerant with USB device function, supports TIM1/SPI1/COMP1/USART1/USB-DM alternate functions.
22 PA12 bidirectional General-purpose I/O, 5V tolerant with USB device function, supports TIM1/SPI1/USART1/USB-DP alternate functions.
23 PA13 bidirectional JTAG/SWD debug interface (SWDIO) or general-purpose I/O, 5V tolerant, supports IR_OUT/USB_NOE alternate functions.
24 PA14 bidirectional JTAG/SWD debug interface (SWCLK) or general-purpose I/O, 5V tolerant, supports LPTIM1_OUT/I2C1_SMBA alternate functions.
25 PA15 bidirectional JTAG debug input (JTDI) or general-purpose I/O, 5V tolerant, supports TIM2/USART2/SPI1/USART3/TSC alternate functions.
26 PB3 bidirectional JTAG debug output (TRACESWO) or general-purpose I/O, 5V tolerant with analog switch function, supports TIM2/SPI1/USART1/TSC alternate functions.
27 PB4 bidirectional JTAG reset (NJTRST) or general-purpose I/O, 5V tolerant with FM+ I2C and analog switch function, supports I2C3/SPI1/USART1/TSC alternate functions.
28 PB5 bidirectional General-purpose I/O, 5V tolerant, supports LPTIM1/I2C1/SPI1/USART1/TSC/TIM16 alternate functions.
29 PB6 bidirectional General-purpose I/O, 5V tolerant with FM+ I2C and analog switch function, supports LPTIM1/I2C1/USART1/TSC/TIM16 alternate functions.
30 PB7 bidirectional General-purpose I/O, 5V tolerant with FM+ I2C and analog switch function, supports LPTIM1/I2C1/USART1/TSC alternate functions, programmable voltage detector input.
31 PH3 bidirectional Boot configuration input (BOOT0) or general-purpose I/O, 5V tolerant.
32 VSS power_in Ground (reference potential for digital circuits).

Key specifications

Parameter Value
Manufacturer STMicroelectronics
Package LQFP-32(7x7)
Category Embedded Processors & Controllers
Pins 32

CAD (KiCad official)

  • Symbol: STM32L422KBT6
  • Footprint: Package_QFP:LQFP-32_7x7mm_P0.8mm
  • 3D model: LQFP-32(7x7) (KiCad packages3D, STEP)
  • 3D model files: stm32l422kbt6-etched.step / stm32l422kbt6-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); stm32l422kbt6.step / stm32l422kbt6.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: STMicroelectronics datasheet (184 pp, sha256 6bef461ef929a17c, retrieved 2026-10-07, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-4-5-20251001 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF