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STM32L071K8U3
Public Made by Adomby adom
STMicroelectronics Microcontrollers (MCU/MPU/SOC), UFQFPN-32(5x5). Pinout checked against ST's open pin data, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownSTM32L071K8U3
STMicroelectronics · Microcontrollers (MCU/MPU/SOC) · UFQFPN-32(5x5)
STM32L071K8U3 from STMicroelectronics, in a UFQFPN-32(5x5). 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 | PC14-OSC32_IN | input | 32 kHz oscillator input pin for RTC operation, 5V tolerant I/O with alternate functions for SPI, USART, LPTIM, TIM2, TIM3, EVENTOUT. |
| 2 | PC15-OSC32_OUT | output | 32 kHz oscillator output pin for RTC operation, standard 3.3V I/O with alternate functions for OSC32_OUT. |
| 3 | NRST | bidirectional | Bidirectional reset pin with embedded weak pull-up resistor for system reset control. |
| 4 | VSSA | power_in | Ground reference pin for analog circuits and ADC. |
| 5 | VDDA | power_in | Analog power supply pin (1.65V to 3.6V) for ADC and comparators. |
| 6 | PA0 | bidirectional | 5V-tolerant I/O pin on Port A with analog input ADC_IN0 and alternate functions for TIM2, USART2, COMP1. |
| 7 | PA1 | bidirectional | 5V-tolerant I/O pin on Port A with analog input ADC_IN1 and alternate functions for TIM2, TIM21, USART2, COMP1. |
| 8 | PA2 | bidirectional | 5V-tolerant I/O pin on Port A with analog input ADC_IN2 and alternate functions for TIM2, TIM21, USART2, LPUART1, COMP2. |
| 9 | PA3 | bidirectional | 5V-tolerant I/O pin on Port A with analog input ADC_IN3 and alternate functions for TIM2, TIM21, USART2, LPUART1, COMP2. |
| 10 | PA4 | bidirectional | Standard 3.3V I/O pin on Port A with analog input ADC_IN4 and alternate functions for SPI1, USART2, TIM22. |
| 11 | PA5 | bidirectional | Standard 3.3V I/O pin on Port A with analog input ADC_IN5 and alternate functions for SPI1, TIM2, COMP. |
| 12 | PA6 | bidirectional | 5V-tolerant I/O pin on Port A with analog input ADC_IN6 and alternate functions for SPI1, TIM3, TIM22, COMP1, LPUART1. |
| 13 | PA7 | bidirectional | 5V-tolerant I/O pin on Port A with analog input ADC_IN7 and alternate functions for SPI1, TIM3, TIM22, COMP2. |
| 14 | PB0 | bidirectional | 5V-tolerant I/O pin on Port B with analog input ADC_IN8 and alternate functions for TIM3, COMP, VREF_OUT. |
| 15 | PB1 | bidirectional | 5V-tolerant I/O pin on Port B with analog input ADC_IN9 and alternate functions for TIM3, LPUART1, COMP, VREF_OUT. |
| 16 | VSS | power_in | Ground reference pin for digital circuits and I/O. |
| 17 | VDD | power_in | Main power supply pin (1.65V to 3.6V) for digital circuits. |
| 18 | PA8 | bidirectional | 5V-tolerant Fast Mode+ capable I/O pin with alternate functions for MCO, USART1, I2C3. |
| 19 | PA9 | bidirectional | 5V-tolerant Fast Mode+ capable I/O pin with alternate functions for MCO, USART1, I2C1, I2C3. |
| 20 | PA10 | bidirectional | 5V-tolerant Fast Mode+ capable I/O pin with alternate functions for USART1, I2C1. |
| 21 | PA11 | bidirectional | 5V-tolerant I/O pin supplied by VDDIO2 with alternate functions for SPI1, USART1, COMP1. |
| 22 | PA12 | bidirectional | 5V-tolerant I/O pin supplied by VDDIO2 with alternate functions for SPI1, USART1, COMP2. |
| 23 | PA13 | bidirectional | 5V-tolerant I/O pin with alternate functions for SWDIO debug, LPUART1 receiver. |
| 24 | VDDIO2 | power_in | Separate power supply pin (1.65V to 3.6V) for PA11 and PA12 I/O buffers. |
| 25 | PA14 | bidirectional | 5V-tolerant I/O pin with alternate functions for SWCLK debug, USART2, LPUART1. |
| 26 | PB4 | bidirectional | 5V-tolerant Fast Mode+ capable I/O pin with alternate functions for SPI1, TIM3, TIM22, USART1, USART5, I2C3, COMP2. |
| 27 | PB5 | bidirectional | 5V-tolerant I/O pin with alternate functions for SPI1, LPTIM1, I2C1, TIM3, TIM22, USART1, USART5, COMP2. |
| 28 | PB6 | bidirectional | 5V-tolerant Fast Mode+ capable I/O pin with alternate functions for USART1, I2C1, LPTIM1, COMP2. |
| 29 | PB7 | bidirectional | 5V-tolerant Fast Mode+ capable I/O pin with alternate functions for USART1, I2C1, LPTIM1, USART4, COMP2, VREF_PVD_IN. |
| 30 | BOOT0 | input | Dedicated boot mode selection pin for choosing between boot from main flash memory or system bootloader. |
| 31 | VSS | power_in | Ground reference pin for digital circuits and I/O. |
| 32 | VDD | power_in | Main power supply pin (1.65V to 3.6V) for digital circuits. |
| 33 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | UFQFPN-32(5x5) |
| Category | Embedded Processors & Controllers |
| Pins | 33 |
CAD (KiCad official)
- Symbol:
STM32L071K8U3 - Footprint:
Package_DFN_QFN:UFQFPN-32-1EP_5x5mm_P0.5mm_EP3.5x3.5mm - 3D model: UFQFPN-32(5x5) (KiCad packages3D, STEP)
- 3D model files:
stm32l071k8u3-etched.step/stm32l071k8u3-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);stm32l071k8u3.step/stm32l071k8u3.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: STMicroelectronics datasheet (148 pp, sha256
f413c7ce36b98e6c, retrieved 2026-10-07, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-4-5-20251001(text), consensusclaude-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).