component
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.
main
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{
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"version": "0.1.0",
"type": "component",
"description": "STMicroelectronics Microcontrollers (MCU/MPU/SOC), UFQFPN-32(5x5). Pinout checked against ST's open pin data, KiCad symbol/footprint/3D.",
"tags": [
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"embedded processors & controllers",
"stm32l071k8u3",
"factory-2.0.0",
"extractor-text"
],
"dependencies": {},
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"stm32l071k8u3.step",
"stm32l071k8u3.lbr",
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"component": {
"mpn": "STM32L071K8U3",
"manufacturer": "STMicroelectronics",
"package": "UFQFPN-32(5x5)",
"pin_count": 33,
"category": "Embedded Processors & Controllers",
"subcategory": "Microcontrollers (MCU/MPU/SOC)",
"datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588923341239963648",
"parts": {
"symbol": "stm32l071k8u3.kicad_sym",
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"lbr": "stm32l071k8u3.lbr"
},
"distributor_links": {
"lcsc": "C1339777",
"digikey": "497-16821-ND",
"mouser": "511-STM32L071K8U3"
},
"distributor_check": {
"checked_at": "2026-10-07T08:52:16Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": "497-16821-ND",
"status": "found"
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"pn": "511-STM32L071K8U3",
"status": "found"
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},
"pins": [
{
"number": "1",
"name": "PC14-OSC32_IN",
"type": "input",
"description": "32 kHz oscillator input pin for RTC operation, 5V tolerant I/O with alternate functions for SPI, USART, LPTIM, TIM2, TIM3, EVENTOUT."
},
{
"number": "2",
"name": "PC15-OSC32_OUT",
"type": "output",
"description": "32 kHz oscillator output pin for RTC operation, standard 3.3V I/O with alternate functions for OSC32_OUT."
},
{
"number": "3",
"name": "NRST",
"type": "bidirectional",
"description": "Bidirectional reset pin with embedded weak pull-up resistor for system reset control."
},
{
"number": "4",
"name": "VSSA",
"type": "power_in",
"description": "Ground reference pin for analog circuits and ADC."
},
{
"number": "5",
"name": "VDDA",
"type": "power_in",
"description": "Analog power supply pin (1.65V to 3.6V) for ADC and comparators."
},
{
"number": "6",
"name": "PA0",
"type": "bidirectional",
"description": "5V-tolerant I/O pin on Port A with analog input ADC_IN0 and alternate functions for TIM2, USART2, COMP1."
},
{
"number": "7",
"name": "PA1",
"type": "bidirectional",
"description": "5V-tolerant I/O pin on Port A with analog input ADC_IN1 and alternate functions for TIM2, TIM21, USART2, COMP1."
},
{
"number": "8",
"name": "PA2",
"type": "bidirectional",
"description": "5V-tolerant I/O pin on Port A with analog input ADC_IN2 and alternate functions for TIM2, TIM21, USART2, LPUART1, COMP2."
},
{
"number": "9",
"name": "PA3",
"type": "bidirectional",
"description": "5V-tolerant I/O pin on Port A with analog input ADC_IN3 and alternate functions for TIM2, TIM21, USART2, LPUART1, COMP2."
},
{
"number": "10",
"name": "PA4",
"type": "bidirectional",
"description": "Standard 3.3V I/O pin on Port A with analog input ADC_IN4 and alternate functions for SPI1, USART2, TIM22."
},
{
"number": "11",
"name": "PA5",
"type": "bidirectional",
"description": "Standard 3.3V I/O pin on Port A with analog input ADC_IN5 and alternate functions for SPI1, TIM2, COMP."
},
{
"number": "12",
"name": "PA6",
"type": "bidirectional",
"description": "5V-tolerant I/O pin on Port A with analog input ADC_IN6 and alternate functions for SPI1, TIM3, TIM22, COMP1, LPUART1."
},
{
"number": "13",
"name": "PA7",
"type": "bidirectional",
"description": "5V-tolerant I/O pin on Port A with analog input ADC_IN7 and alternate functions for SPI1, TIM3, TIM22, COMP2."
},
{
"number": "14",
"name": "PB0",
"type": "bidirectional",
"description": "5V-tolerant I/O pin on Port B with analog input ADC_IN8 and alternate functions for TIM3, COMP, VREF_OUT."
},
{
"number": "15",
"name": "PB1",
"type": "bidirectional",
"description": "5V-tolerant I/O pin on Port B with analog input ADC_IN9 and alternate functions for TIM3, LPUART1, COMP, VREF_OUT."
},
{
"number": "16",
"name": "VSS",
"type": "power_in",
"description": "Ground reference pin for digital circuits and I/O."
},
{
"number": "17",
"name": "VDD",
"type": "power_in",
"description": "Main power supply pin (1.65V to 3.6V) for digital circuits."
},
{
"number": "18",
"name": "PA8",
"type": "bidirectional",
"description": "5V-tolerant Fast Mode+ capable I/O pin with alternate functions for MCO, USART1, I2C3."
},
{
"number": "19",
"name": "PA9",
"type": "bidirectional",
"description": "5V-tolerant Fast Mode+ capable I/O pin with alternate functions for MCO, USART1, I2C1, I2C3."
},
{
"number": "20",
"name": "PA10",
"type": "bidirectional",
"description": "5V-tolerant Fast Mode+ capable I/O pin with alternate functions for USART1, I2C1."
},
{
"number": "21",
"name": "PA11",
"type": "bidirectional",
"description": "5V-tolerant I/O pin supplied by VDDIO2 with alternate functions for SPI1, USART1, COMP1."
},
{
"number": "22",
"name": "PA12",
"type": "bidirectional",
"description": "5V-tolerant I/O pin supplied by VDDIO2 with alternate functions for SPI1, USART1, COMP2."
},
{
"number": "23",
"name": "PA13",
"type": "bidirectional",
"description": "5V-tolerant I/O pin with alternate functions for SWDIO debug, LPUART1 receiver."
},
{
"number": "24",
"name": "VDDIO2",
"type": "power_in",
"description": "Separate power supply pin (1.65V to 3.6V) for PA11 and PA12 I/O buffers."
},
{
"number": "25",
"name": "PA14",
"type": "bidirectional",
"description": "5V-tolerant I/O pin with alternate functions for SWCLK debug, USART2, LPUART1."
},
{
"number": "26",
"name": "PB4",
"type": "bidirectional",
"description": "5V-tolerant Fast Mode+ capable I/O pin with alternate functions for SPI1, TIM3, TIM22, USART1, USART5, I2C3, COMP2."
},
{
"number": "27",
"name": "PB5",
"type": "bidirectional",
"description": "5V-tolerant I/O pin with alternate functions for SPI1, LPTIM1, I2C1, TIM3, TIM22, USART1, USART5, COMP2."
},
{
"number": "28",
"name": "PB6",
"type": "bidirectional",
"description": "5V-tolerant Fast Mode+ capable I/O pin with alternate functions for USART1, I2C1, LPTIM1, COMP2."
},
{
"number": "29",
"name": "PB7",
"type": "bidirectional",
"description": "5V-tolerant Fast Mode+ capable I/O pin with alternate functions for USART1, I2C1, LPTIM1, USART4, COMP2, VREF_PVD_IN."
},
{
"number": "30",
"name": "BOOT0",
"type": "input",
"description": "Dedicated boot mode selection pin for choosing between boot from main flash memory or system bootloader."
},
{
"number": "31",
"name": "VSS",
"type": "power_in",
"description": "Ground reference pin for digital circuits and I/O."
},
{
"number": "32",
"name": "VDD",
"type": "power_in",
"description": "Main power supply pin (1.65V to 3.6V) for digital circuits."
},
{
"number": "33",
"name": "EP",
"type": "passive",
"description": "Exposed pad (from the footprint; not named in the datasheet pin table)."
}
],
"provenance": {
"extractor": "extract_pins 0.3",
"factory_chain": {
"factory": "2.0.0",
"extractor": "extract_pins 0.3",
"primary_model": "claude-haiku-4-5-20251001",
"primary_mode": "text",
"consensus_model": "claude-sonnet-5-5",
"consensus": "agreed",
"guards": "pin_guards 0.1: passed",
"guard_notes": [
"extractor flagged: PC14-OSC32_IN and PC15-OSC32_OUT pin types reflect GPIO-mode operation; when used as oscillator pins; PA11 and PA12 are supplied by separate VDDIO2 pin rather than main VDD; datasheet notes these as gre",
"exposed pad 33 added from the footprint",
"9/33 pins cited to the wrong page (name found elsewhere): ['17:VDD@p47', '18:PA8@p42', '19:PA9@p42', '20:PA10@p42']"
],
"pages_sent": 74,
"cost_usd": 0.498,
"at": "2026-10-07T08:51:58"
},
"datasheet": {
"url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588923341239963648",
"pages": 148,
"sha256": "f413c7ce36b98e6c",
"source_tier": "lcsc"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 33,
"described": 33,
"cites_pages": true,
"refuses_to_fabricate": true
}
},
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"units": "mm",
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"seat": "z = 0",
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"sha256": "90af021df1253eae35bee4f4a4f9ba63bcf4a308f6e9f12d58f6e00181c23140",
"checked": "2026-10-07",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "stm32l071k8u3-etched.step",
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}