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STM32L031K6T6TR

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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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STM32L031K6T6TR

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

STM32L031K6T6TR 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 Supply voltage input, operating range 1.65 V to 3.6 V.
2 PC14-OSC32_IN bidirectional Standard 3.3 V I/O; functions as 32 kHz oscillator input for the RTC.
3 PC15-OSC32_OUT bidirectional Standard 3.3 V I/O; functions as 32 kHz oscillator output for the RTC.
4 NRST bidirectional Bidirectional reset input pin with embedded weak pull-up resistor, active low.
5 VDDA power_in Analog power supply input, operating range 1.65 V to 3.6 V; requires decoupling capacitor.
6 PA0-CK_IN bidirectional General-purpose I/O, standard 3.3 V, selectable as external clock input; supports Timer, USART, comparator alternates and ADC, RTC tamper/wakeup functions.
7 PA1 bidirectional 5V-tolerant general-purpose I/O with ADC input; supports timer, USART, I2C, comparator alternate functions.
8 PA2 bidirectional Standard 3.3 V general-purpose I/O with ADC input; supports timer, USART, LPUART, comparator alternate functions.
9 PA3 bidirectional 5V-tolerant general-purpose I/O with ADC input; supports timer and USART/LPUART alternate functions.
10 PA4 bidirectional Standard 3.3 V general-purpose I/O with ADC input; supports SPI chip select, LPTIM, USART clock, timer alternate functions.
11 PA5 bidirectional Standard 3.3 V general-purpose I/O with ADC input; supports SPI clock and timer alternate functions.
12 PA6 bidirectional 5V-tolerant general-purpose I/O with ADC input; supports SPI MISO, LPTIM, LPUART CTS, timer, and comparator alternate functions.
13 PA7 bidirectional 5V-tolerant general-purpose I/O with ADC input; supports SPI MOSI, LPTIM, USART CTS, timer, and comparator alternate functions.
14 PB0 bidirectional 5V-tolerant general-purpose I/O with ADC input; supports SPI MISO, USART RTS, timer alternates; outputs voltage reference.
15 PB1 bidirectional 5V-tolerant general-purpose I/O with ADC input; supports USART clock, SPI MOSI, LPUART RTS, timer alternates; outputs voltage reference.
16 VSS power_in Ground supply pin.
17 VDD power_in Supply voltage input, operating range 1.65 V to 3.6 V.
18 PA8 bidirectional 5V-tolerant general-purpose I/O; supports master clock output, LPTIM input, event output, USART clock, and timer alternate functions.
19 PA9 bidirectional 5V-tolerant general-purpose I/O with FM+ I2C capability (up to 1 Mbit/s); supports MCO, I2C1 clock, USART TX, and timer alternate functions.
20 PA10 bidirectional 5V-tolerant general-purpose I/O with FM+ I2C capability (up to 1 Mbit/s); supports I2C1 data, USART RX, and timer alternate functions.
21 PA11 bidirectional 5V-tolerant general-purpose I/O; supports SPI MISO, USART CTS, timer, event output, and comparator alternate functions.
22 PA12 bidirectional 5V-tolerant general-purpose I/O; supports SPI MOSI, USART RTS, event output, and comparator alternate functions.
23 PA13 bidirectional 5V-tolerant general-purpose I/O dedicated to SWDIO debug interface; also supports LPTIM and LPUART alternate functions.
24 PA14 bidirectional 5V-tolerant general-purpose I/O dedicated to SWCLK debug interface; also supports LPTIM, I2C1 SMBus alert, USART TX, and LPUART alternate functions.
25 PA15 bidirectional 5V-tolerant general-purpose I/O; supports SPI chip select, timer, USART RX, and event output alternate functions.
26 PB3 bidirectional 5V-tolerant general-purpose I/O; supports SPI clock, timer, event output alternates and comparator inverting input function.
27 PB4 bidirectional 5V-tolerant general-purpose I/O; supports SPI MISO, timer, event output alternates and comparator non-inverting input function.
28 PB5 bidirectional 5V-tolerant general-purpose I/O; supports SPI MOSI, LPTIM input, I2C1 SMBus alert, timer alternates and comparator input function.
29 PB6 bidirectional 5V-tolerant general-purpose I/O with FM+ I2C capability (up to 1 Mbit/s); supports USART TX, I2C1 clock, LPTIM, timer alternates and comparator input.
30 PB7 bidirectional 5V-tolerant general-purpose I/O with FM+ I2C capability (up to 1 Mbit/s); supports USART RX, I2C1 data, LPTIM alternates; provides voltage reference and comparator inputs.
31 BOOT0 input Dedicated boot mode selection input; must be held low during reset to execute code from Flash memory.
32 VSS power_in Ground supply pin.

Key specifications

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

CAD (KiCad official)

  • Symbol: STM32L031K6T6TR
  • Footprint: Package_QFP:LQFP-32_7x7mm_P0.8mm
  • 3D model: LQFP-32(7x7) (KiCad packages3D, STEP)
  • 3D model files: stm32l031k6t6tr-etched.step / stm32l031k6t6tr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); stm32l031k6t6tr.step / stm32l031k6t6tr.glb are the bare package body.

Provenance

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

  • Datasheet: STMicroelectronics datasheet (126 pp, sha256 9726c48418e03f62, retrieved 2026-10-01, 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