component
STM32L021K4T6
Public Made by Adomby adom
STMicroelectronics Microcontrollers (MCU/MPU/SOC), LQFP-32(7x7). Pinout checked against ST's open pin data, KiCad symbol/footprint/3D.
main
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{
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"type": "component",
"slug": "stm32l021k4t6",
"title": "STM32L021K4T6",
"brief": "STMicroelectronics Microcontrollers (MCU/MPU/SOC), LQFP-32(7x7). Pinout checked against ST's open pin data, KiCad symbol/footprint/3D.",
"version": "0.1.0",
"license": "CC-BY-SA-4.0",
"tags": [
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"embedded processors & controllers",
"stm32l021k4t6",
"factory-2.0.0",
"extractor-text"
],
"component": {
"mpn": "STM32L021K4T6",
"manufacturer": "STMicroelectronics",
"package": "LQFP-32(7x7)",
"pin_count": 32,
"category": "Embedded Processors & Controllers",
"subcategory": "Microcontrollers (MCU/MPU/SOC)",
"datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588922426365792256",
"parts": {
"symbol": "stm32l021k4t6.kicad_sym",
"footprint": "stm32l021k4t6.kicad_mod",
"model_3d": "stm32l021k4t6-hero.glb",
"model_3d_plain": "stm32l021k4t6.glb",
"model_3d_step": "stm32l021k4t6-etched.step",
"model_3d_step_plain": "stm32l021k4t6.step",
"lbr": "stm32l021k4t6.lbr"
},
"distributor_links": {
"lcsc": "C1338900",
"digikey": "497-17903-ND",
"mouser": "511-STM32L021K4T6"
},
"distributor_check": {
"checked_at": "2026-10-11T23:36:12Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": "497-17903-ND",
"status": "found"
},
"mouser": {
"pn": "511-STM32L021K4T6",
"status": "found"
}
},
"pins": [
{
"number": "1",
"name": "VDD",
"type": "power_in",
"description": "Digital power supply; the device operates from 1.65 V to 3.6 V according to the features list."
},
{
"number": "2",
"name": "PC14-OSC32_IN",
"type": "bidirectional",
"description": "5 V tolerant (FT) I/O, default function PC14, with additional function OSC32_IN."
},
{
"number": "3",
"name": "PC15-OSC32_OUT",
"type": "bidirectional",
"description": "Standard 3.3 V I/O (TC structure), default function PC15, with additional function OSC32_OUT."
},
{
"number": "4",
"name": "NRST",
"type": "bidirectional",
"description": "Active-low bidirectional reset pin with embedded weak pull-up; acts as device reset input and internal reset output."
},
{
"number": "5",
"name": "VDDA",
"type": "power_in",
"description": "Analog power supply."
},
{
"number": "6",
"name": "PA0",
"type": "bidirectional",
"description": "3.3 V tolerant I/O directly connected to the ADC (TTa structure), with ADC_IN0, COMP1_INM and RTC_TAMP2/WKUP1 as additional functions."
},
{
"number": "7",
"name": "PA1",
"type": "bidirectional",
"description": "5 V tolerant (FT) I/O, with ADC_IN1 and COMP1_INP as additional functions."
},
{
"number": "8",
"name": "PA2",
"type": "bidirectional",
"description": "3.3 V tolerant I/O directly connected to the ADC (TTa structure), with ADC_IN2, COMP2_INM and RTC_TAMP3/WKUP3 as additional functions."
},
{
"number": "9",
"name": "PA3",
"type": "bidirectional",
"description": "5 V tolerant (FT) I/O, with COMP2_INP and ADC_IN3 as additional functions."
},
{
"number": "10",
"name": "PA4",
"type": "bidirectional",
"description": "3.3 V tolerant I/O directly connected to the ADC (TTa structure), with COMP1_INM, COMP2_INM and ADC_IN4 as additional functions."
},
{
"number": "11",
"name": "PA5",
"type": "bidirectional",
"description": "3.3 V tolerant I/O directly connected to the ADC (TTa structure), with COMP1_INM, COMP2_INM and ADC_IN5 as additional functions."
},
{
"number": "12",
"name": "PA6",
"type": "bidirectional",
"description": "5 V tolerant (FT) I/O, with ADC_IN6 as additional function."
},
{
"number": "13",
"name": "PA7",
"type": "bidirectional",
"description": "5 V tolerant (FT) I/O, with COMP2_INP and ADC_IN7 as additional functions."
},
{
"number": "14",
"name": "PB0",
"type": "bidirectional",
"description": "5 V tolerant (FT) I/O, with ADC_IN8 and VREF_OUT as additional functions."
},
{
"number": "15",
"name": "PB1",
"type": "bidirectional",
"description": "5 V tolerant (FT) I/O, with ADC_IN9 and VREF_OUT as additional functions."
},
{
"number": "16",
"name": "VSS",
"type": "power_in",
"description": "Digital and analog ground."
},
{
"number": "17",
"name": "VDD",
"type": "power_in",
"description": "Digital power supply."
},
{
"number": "18",
"name": "PA8",
"type": "bidirectional",
"description": "5 V tolerant (FT) I/O with alternate functions MCO, LPTIM1_IN1, EVENTOUT, USART2_CK and TIM2_CH1."
},
{
"number": "19",
"name": "PA9",
"type": "bidirectional",
"description": "5 V tolerant (FTf) I/O that is Fast Mode Plus capable, with alternate functions MCO, I2C1_SCL, LPTIM1_OUT, USART2_TX, TIM21_CH2 and COMP1_OUT."
},
{
"number": "20",
"name": "PA10",
"type": "bidirectional",
"description": "5 V tolerant (FTf) I/O that is Fast Mode Plus capable, with alternate functions TIM21_CH1, I2C1_SDA, RTC_REFIN, USART2_RX, TIM2_CH3 and COMP1_OUT."
},
{
"number": "21",
"name": "PA11",
"type": "bidirectional",
"description": "5 V tolerant (FT) I/O, with alternate functions SPI1_MISO, LPTIM1_OUT, EVENTOUT, USART2_CTS, TIM21_CH2 and COMP1_OUT."
},
{
"number": "22",
"name": "PA12",
"type": "bidirectional",
"description": "5 V tolerant (FT) I/O, with alternate functions SPI1_MOSI, EVENTOUT, USART2_RTS_DE and COMP2_OUT."
},
{
"number": "23",
"name": "PA13",
"type": "bidirectional",
"description": "5 V tolerant (FTf) I/O that is Fast Mode Plus capable, with alternate function SWDIO and others including LPTIM1_ETR, I2C1_SDA, SPI1_SCK, LPUART1_RX and COMP1_OUT."
},
{
"number": "24",
"name": "PA14",
"type": "bidirectional",
"description": "5 V tolerant (FT) I/O, with alternate function SWCLK and others including LPTIM1_OUT, I2C1_SMBA, USART2_TX, SPI1_MISO, LPUART1_TX and COMP2_OUT."
},
{
"number": "25",
"name": "PA15",
"type": "bidirectional",
"description": "5 V tolerant (FT) I/O, with alternate functions SPI1_NSS, TIM2_ETR, EVENTOUT, USART2_RX and TIM2_CH1."
},
{
"number": "26",
"name": "PB3",
"type": "bidirectional",
"description": "5 V tolerant (FT) I/O, with alternate functions SPI1_SCK, TIM2_CH2, EVENTOUT and COMP2_INM."
},
{
"number": "27",
"name": "PB4",
"type": "bidirectional",
"description": "5 V tolerant (FT) I/O, with alternate functions SPI1_MISO and EVENTOUT, and COMP2_INP as additional function."
},
{
"number": "28",
"name": "PB5",
"type": "bidirectional",
"description": "5 V tolerant (FT) I/O, with alternate functions SPI1_MOSI, LPTIM1_IN1, I2C1_SMBA and TIM21_CH1, and COMP2_INP as additional function."
},
{
"number": "29",
"name": "PB6",
"type": "bidirectional",
"description": "5 V tolerant (FTf) I/O that is Fast Mode Plus capable, with alternate functions USART2_TX, I2C1_SCL, LPTIM1_ETR, TIM2_CH3 and LPUART1_TX, and COMP2_INP as additional function."
},
{
"number": "30",
"name": "PB7",
"type": "bidirectional",
"description": "5 V tolerant (FTf) I/O that is Fast Mode Plus capable, with alternate functions USART2_RX, I2C1_SDA, LPTIM1_IN2, TIM2_CH4 and LPUART1_RX, and COMP2_INP and VREF_PVD_IN as additional functions."
},
{
"number": "31",
"name": "PB9-BOOT0",
"type": "input",
"description": "Dedicated BOOT0 pin (B structure) used for boot memory selection."
},
{
"number": "32",
"name": "VSS",
"type": "power_in",
"description": "Digital and analog ground."
}
],
"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: MPN check: STM32L021K4T6 decodes as K = 32 pins and T = LQFP, so the LQFP32 package is the correct v; Figure 3 (LQFP32 pinout drawing, page 33) is an image and its text could not be extracted; the pin-t; The LQFP32 pin numbers were read from flattened table text where all six package columns run togethe",
"1/32 pins cited to the wrong page (name found elsewhere): ['1:VDD@p1']"
],
"pages_sent": 47,
"cost_usd": 0.204,
"at": "2026-10-11T23:35:54"
},
"datasheet": {
"url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588922426365792256",
"pages": 114,
"sha256": "97b23667dad711b9",
"source_tier": "lcsc"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 32,
"described": 32,
"cites_pages": true,
"refuses_to_fabricate": true
}
},
"viewers": {
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"footprint": "viewers/footprint.html"
},
"models_3d": [
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"up": "Z",
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"seat": "z = 0",
"extents_mm": [
9,
9,
1.5
],
"zmin_mm": 0,
"centre_offset_mm": 0,
"footprint_binding": "identity",
"sha256": "be0e412f1c66fee70039b0e109e0cc7c823161dda97593718afa97569bc61ce3",
"checked": "2026-10-11",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "stm32l021k4t6-etched.step",
"role": "eda",
"up": "Z",
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"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
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9,
9,
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"zmin_mm": 0,
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"footprint_binding": "identity",
"sha256": "9caa7cfbe09d7a5e51ef5d26993b92a8f7c92bd60b4fc36ab440f3167df8ec8d",
"checked": "2026-10-11",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
}
]
},
"metadata": {
"specs": {
"Manufacturer": "STMicroelectronics",
"Package": "LQFP-32(7x7)",
"Category": "Embedded Processors & Controllers",
"Pins": "32"
}
},
"variants": [],
"sections": [
"hero",
"viewers",
"readme",
"breadcrumbs",
"info"
],
"discovery_triggers": [
"stm32l021k4t6"
],
"discovery_pitch": "STM32L021K4T6 (STMicroelectronics) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
"author": {
"name": "Ray",
"email": "[email protected]"
},
"dependencies": {},
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