component
STM32L071KBU3
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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{
"schema_version": 1,
"type": "component",
"slug": "stm32l071kbu3",
"title": "STM32L071KBU3",
"brief": "STMicroelectronics Microcontrollers (MCU/MPU/SOC), UFQFPN-32(5x5). Pinout checked against ST's open pin data, KiCad symbol/footprint/3D.",
"version": "0.1.0",
"license": "CC-BY-SA-4.0",
"tags": [
"component",
"embedded processors & controllers",
"stm32l071kbu3",
"factory-2.0.0",
"extractor-text"
],
"component": {
"mpn": "STM32L071KBU3",
"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/8588941268391514112",
"parts": {
"symbol": "stm32l071kbu3.kicad_sym",
"footprint": "stm32l071kbu3.kicad_mod",
"model_3d": "stm32l071kbu3-hero.glb",
"model_3d_plain": "stm32l071kbu3.glb",
"model_3d_step": "stm32l071kbu3-etched.step",
"model_3d_step_plain": "stm32l071kbu3.step",
"lbr": "stm32l071kbu3.lbr"
},
"distributor_links": {
"lcsc": "C1344448",
"digikey": "497-16822-ND",
"mouser": "511-STM32L071KBU3"
},
"distributor_check": {
"checked_at": "2026-10-11T23:57:50Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": "497-16822-ND",
"status": "found"
},
"mouser": {
"pn": "511-STM32L071KBU3",
"status": "found"
}
},
"pins": [
{
"number": "1",
"name": "PC14-OSC32_IN",
"type": "bidirectional",
"description": "5 V tolerant (FT) I/O with function after reset PC14, and OSC32_IN as the 32 kHz oscillator input (additional function)."
},
{
"number": "2",
"name": "PC15-OSC32_OUT",
"type": "bidirectional",
"description": "Standard 3.3 V I/O (TC) with function after reset PC15, and OSC32_OUT as the 32 kHz oscillator output (additional function)."
},
{
"number": "3",
"name": "NRST",
"type": "bidirectional",
"description": "Bidirectional reset pin with embedded weak pull-up resistor."
},
{
"number": "4",
"name": "VSSA",
"type": "power_in",
"description": "Analog ground supply pin."
},
{
"number": "5",
"name": "VDDA",
"type": "power_in",
"description": "Analog supply pin."
},
{
"number": "6",
"name": "PA0",
"type": "bidirectional",
"description": "TTa I/O (footnote 'a' not included in the extracted text) with alternate functions TIM2_CH1, USART2_CTS, TIM2_ETR, USART4_TX, COMP1_OUT and additional functions COMP1_INM, ADC_IN0, RTC_TAMP2/WKUP1."
},
{
"number": "7",
"name": "PA1",
"type": "bidirectional",
"description": "5 V tolerant (FT) I/O with alternate functions EVENTOUT, TIM2_CH2, USART2_RTS/USART2_DE, TIM21_ETR, USART4_RX and additional functions COMP1_INP, ADC_IN1."
},
{
"number": "8",
"name": "PA2",
"type": "bidirectional",
"description": "5 V tolerant (FT) I/O with alternate functions TIM21_CH1, TIM2_CH3, USART2_TX, LPUART1_TX, COMP2_OUT and additional functions COMP2_INM, ADC_IN2."
},
{
"number": "9",
"name": "PA3",
"type": "bidirectional",
"description": "5 V tolerant (FT) I/O with alternate functions TIM21_CH2, TIM2_CH4, USART2_RX, LPUART1_RX and additional functions COMP2_INP, ADC_IN3."
},
{
"number": "10",
"name": "PA4",
"type": "bidirectional",
"description": "Standard 3.3 V I/O (TC) with alternate functions SPI1_NSS, USART2_CK, TIM22_ETR and additional functions COMP1_INM, COMP2_INM, ADC_IN4."
},
{
"number": "11",
"name": "PA5",
"type": "bidirectional",
"description": "Standard 3.3 V I/O (TC) with alternate functions SPI1_SCK, TIM2_ETR, TIM2_CH1 and additional functions COMP1_INM, COMP2_INM, ADC_IN5."
},
{
"number": "12",
"name": "PA6",
"type": "bidirectional",
"description": "5 V tolerant (FT) I/O with alternate functions SPI1_MISO, TIM3_CH1, LPUART1_CTS, TIM22_CH1, EVENTOUT, COMP1_OUT and additional function ADC_IN6."
},
{
"number": "13",
"name": "PA7",
"type": "bidirectional",
"description": "5 V tolerant (FT) I/O with alternate functions SPI1_MOSI, TIM3_CH2, TIM22_CH2, EVENTOUT, COMP2_OUT and additional function ADC_IN7."
},
{
"number": "14",
"name": "PB0",
"type": "bidirectional",
"description": "5 V tolerant (FT) I/O with alternate functions EVENTOUT, TIM3_CH3 and additional functions ADC_IN8, VREF_OUT."
},
{
"number": "15",
"name": "PB1",
"type": "bidirectional",
"description": "5 V tolerant (FT) I/O with alternate functions TIM3_CH4, LPUART1_RTS/LPUART1_DE and additional functions ADC_IN9, VREF_OUT."
},
{
"number": "16",
"name": "VSS",
"type": "power_in",
"description": "Ground pin."
},
{
"number": "17",
"name": "VDD",
"type": "power_in",
"description": "Digital supply pin."
},
{
"number": "18",
"name": "PA8",
"type": "bidirectional",
"description": "5 V tolerant, Fm+ capable (FTf) I/O with alternate functions MCO, EVENTOUT, USART1_CK, I2C3_SCL."
},
{
"number": "19",
"name": "PA9",
"type": "bidirectional",
"description": "5 V tolerant, Fm+ capable (FTf) I/O with alternate functions MCO, USART1_TX, I2C1_SCL, I2C3_SMBA."
},
{
"number": "20",
"name": "PA10",
"type": "bidirectional",
"description": "5 V tolerant, Fm+ capable (FTf) I/O with alternate functions USART1_RX, I2C1_SDA."
},
{
"number": "21",
"name": "PA11",
"type": "bidirectional",
"description": "5 V tolerant (FT) I/O supplied by VDDIO2 (per note 2 of the pinout figures) with alternate functions SPI1_MISO, EVENTOUT, USART1_CTS, COMP1_OUT."
},
{
"number": "22",
"name": "PA12",
"type": "bidirectional",
"description": "5 V tolerant (FT) I/O supplied by VDDIO2 (per note 2 of the pinout figures) with alternate functions SPI1_MOSI, EVENTOUT, USART1_RTS/USART1_DE, COMP2_OUT."
},
{
"number": "23",
"name": "PA13",
"type": "bidirectional",
"description": "5 V tolerant (FT) I/O with alternate functions SWDIO and LPUART1_RX."
},
{
"number": "24",
"name": "VDDIO2",
"type": "power_in",
"description": "I/O supply pin for PA11 and PA12."
},
{
"number": "25",
"name": "PA14",
"type": "bidirectional",
"description": "5 V tolerant (FT) I/O with alternate functions SWCLK, USART2_TX, LPUART1_TX."
},
{
"number": "26",
"name": "PB4",
"type": "bidirectional",
"description": "5 V tolerant, Fm+ capable (FTf) I/O with alternate functions SPI1_MISO, TIM3_CH1, TIM22_CH1, USART1_CTS, USART5_RX, I2C3_SDA and additional function COMP2_INP."
},
{
"number": "27",
"name": "PB5",
"type": "bidirectional",
"description": "5 V tolerant (FT) I/O with alternate functions SPI1_MOSI, LPTIM1_IN1, I2C1_SMBA, TIM3_CH2/TIM22_CH2, USART1_CK, USART5_CK, USART5_RTS/USART5_DE and additional function COMP2_INP."
},
{
"number": "28",
"name": "PB6",
"type": "bidirectional",
"description": "5 V tolerant, Fm+ capable (FTf) I/O with alternate functions USART1_TX, I2C1_SCL, LPTIM1_ETR and additional function COMP2_INP."
},
{
"number": "29",
"name": "PB7",
"type": "bidirectional",
"description": "5 V tolerant, Fm+ capable (FTf) I/O with alternate functions USART1_RX, I2C1_SDA, LPTIM1_IN2, USART4_CTS and additional functions COMP2_INP, VREF_PVD_IN."
},
{
"number": "30",
"name": "BOOT0",
"type": "input",
"description": "Dedicated BOOT0 pin (input only)."
},
{
"number": "31",
"name": "VSS",
"type": "power_in",
"description": "Ground pin."
},
{
"number": "32",
"name": "VDD",
"type": "power_in",
"description": "Digital supply pin."
},
{
"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-5-5",
"primary_mode": "text",
"consensus_model": "claude-sonnet-5-5",
"consensus": "agreed",
"guards": "pin_guards 0.1: passed",
"guard_notes": [
"extractor flagged: Pinout taken from Table 15 (UFQFPN32 column). The pin-1 to pin-32 assignment was cross-checked again; Table 15 footnote 1 says the UFQFPN32 pinout differs from other STM32 devices. Pin numbers are repro; The 'a' footnote defining the TTa I/O structure of PA0 is not in the extracted text, so the structur",
"exposed pad 33 added from the footprint"
],
"pages_sent": 74,
"cost_usd": 0.2927,
"at": "2026-10-11T23:57:34"
},
"datasheet": {
"url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588941268391514112",
"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
}
},
"viewers": {
"symbol": "viewers/symbol.html",
"footprint": "viewers/footprint.html"
},
"models_3d": [
{
"file": "stm32l071kbu3.step",
"role": "plain",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
5,
5,
1.1
],
"zmin_mm": 0,
"centre_offset_mm": 0,
"footprint_binding": "identity",
"sha256": "90af021df1253eae35bee4f4a4f9ba63bcf4a308f6e9f12d58f6e00181c23140",
"checked": "2026-10-11",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "stm32l071kbu3-etched.step",
"role": "eda",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
5,
5,
1.1
],
"zmin_mm": 0,
"centre_offset_mm": 0,
"footprint_binding": "identity",
"sha256": "79d7833e92e58152e2d10ba88e82234f352381b57834f37a124c19a41919033e",
"checked": "2026-10-11",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
}
]
},
"metadata": {
"specs": {
"Manufacturer": "STMicroelectronics",
"Package": "UFQFPN-32(5x5)",
"Category": "Embedded Processors & Controllers",
"Pins": "33"
}
},
"variants": [],
"sections": [
"hero",
"viewers",
"readme",
"breadcrumbs",
"info"
],
"discovery_triggers": [
"stm32l071kbu3"
],
"discovery_pitch": "STM32L071KBU3 (STMicroelectronics) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
"author": {
"name": "Ray",
"email": "[email protected]"
},
"dependencies": {},
"hero": {
"type": "image",
"path": "docs/hero.png"
},
"files": [
"page.json",
"README.md",
"stm32l071kbu3.kicad_sym",
"stm32l071kbu3.kicad_mod",
"stm32l071kbu3.glb",
"stm32l071kbu3.step",
"stm32l071kbu3.lbr",
"docs/hero.png",
"docs/stm32l071kbu3-datasheet.pdf",
"viewers/symbol.html",
"viewers/footprint.html",
"stm32l071kbu3-hero.glb",
"stm32l071kbu3-hero.overlay.json"
],
"visibility": {
"public": true
}
}