component
STM32L431KCU6TR
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": "stm32l431kcu6tr",
"title": "STM32L431KCU6TR",
"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",
"stm32l431kcu6tr",
"factory-2.0.0",
"extractor-text"
],
"component": {
"mpn": "STM32L431KCU6TR",
"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/8588893407582294016",
"parts": {
"symbol": "stm32l431kcu6tr.kicad_sym",
"footprint": "stm32l431kcu6tr.kicad_mod",
"model_3d": "stm32l431kcu6tr-hero.glb",
"model_3d_plain": "stm32l431kcu6tr.glb",
"model_3d_step": "stm32l431kcu6tr-etched.step",
"model_3d_step_plain": "stm32l431kcu6tr.step",
"lbr": "stm32l431kcu6tr.lbr"
},
"distributor_links": {
"lcsc": "C2054968",
"digikey": "497-STM32L431KCU6TR-ND",
"mouser": "511-STM32L431KCU6TR"
},
"distributor_check": {
"checked_at": "2026-10-06T16:47:37Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": "497-STM32L431KCU6TR-ND",
"status": "found"
},
"mouser": {
"pn": "511-STM32L431KCU6TR",
"status": "found"
}
},
"pins": [
{
"number": "1",
"name": "VDD",
"type": "power_in",
"description": "Main power supply input, 1.71V to 3.6V range"
},
{
"number": "2",
"name": "PC14-OSC32_IN",
"type": "bidirectional",
"description": "Port C pin 14, 5V tolerant input/output, functions as external 32kHz oscillator input when configured as OSC32_IN"
},
{
"number": "3",
"name": "PC15-OSC32_OUT",
"type": "bidirectional",
"description": "Port C pin 15, 5V tolerant input/output, functions as external 32kHz oscillator output when configured as OSC32_OUT"
},
{
"number": "4",
"name": "NRST",
"type": "bidirectional",
"description": "Bidirectional reset pin with embedded weak pull-up resistor and debouncing for system reset control"
},
{
"number": "5",
"name": "VDDA/VREF+",
"type": "power_in",
"description": "Analog power supply for ADC, DAC, comparators and operational amplifiers, 1.62V to 3.6V, also serves as positive reference voltage"
},
{
"number": "6",
"name": "PA0/CK_IN",
"type": "bidirectional",
"description": "Port A pin 0, 5V tolerant input/output with analog capability for ADC1_IN5, can function as external clock input or TIM2_CH1"
},
{
"number": "7",
"name": "PA1",
"type": "bidirectional",
"description": "Port A pin 1, 5V tolerant input/output with analog capability for ADC1_IN6 or TIM2_CH2"
},
{
"number": "8",
"name": "PA2",
"type": "bidirectional",
"description": "Port A pin 2, 5V tolerant input/output with analog capability for ADC1_IN7 or USART2_TX"
},
{
"number": "9",
"name": "PA3",
"type": "bidirectional",
"description": "Port A pin 3, 3.6V tolerant input/output with analog capability for operational amplifier output OPAMP1_VOUT or ADC1_IN8"
},
{
"number": "10",
"name": "PA4",
"type": "bidirectional",
"description": "Port A pin 4, 3.6V tolerant input/output with analog capability for DAC1_OUT1 or ADC1_IN9"
},
{
"number": "11",
"name": "PA5",
"type": "bidirectional",
"description": "Port A pin 5, 3.6V tolerant input/output with analog capability for DAC1_OUT2 or ADC1_IN10"
},
{
"number": "12",
"name": "PA6",
"type": "bidirectional",
"description": "Port A pin 6, 5V tolerant input/output with analog capability for ADC1_IN11 or TIM16_CH1"
},
{
"number": "13",
"name": "PA7",
"type": "bidirectional",
"description": "Port A pin 7, 5V tolerant input/output with analog capability for ADC1_IN12, Fm+ capable"
},
{
"number": "14",
"name": "PB0",
"type": "bidirectional",
"description": "Port B pin 0, 5V tolerant input/output with analog capability for ADC1_IN15"
},
{
"number": "15",
"name": "PB1",
"type": "bidirectional",
"description": "Port B pin 1, 5V tolerant input/output with analog capability for ADC1_IN16"
},
{
"number": "16",
"name": "VSS",
"type": "power_in",
"description": "Ground (0V reference) for digital and analog circuits"
},
{
"number": "17",
"name": "VDD",
"type": "power_in",
"description": "Main power supply input, 1.71V to 3.6V range"
},
{
"number": "18",
"name": "PA8",
"type": "bidirectional",
"description": "Port A pin 8, 5V tolerant input/output for MCO clock output or TIM1_CH1"
},
{
"number": "19",
"name": "PA9",
"type": "bidirectional",
"description": "Port A pin 9, 5V tolerant input/output with Fm+ capability for USART1_TX or TIM1_CH2"
},
{
"number": "20",
"name": "PA10",
"type": "bidirectional",
"description": "Port A pin 10, 5V tolerant input/output with Fm+ capability for USART1_RX or TIM1_CH3"
},
{
"number": "21",
"name": "PA11",
"type": "bidirectional",
"description": "Port A pin 11, 5V tolerant input/output for CAN1_RX or TIM1_CH4"
},
{
"number": "22",
"name": "PA12",
"type": "bidirectional",
"description": "Port A pin 12, 5V tolerant input/output for CAN1_TX or USART1_RTS_DE"
},
{
"number": "23",
"name": "PA13",
"type": "bidirectional",
"description": "Port A pin 13, 5V tolerant input/output configured as JTAG TMS or Serial Wire Debug SWDIO after reset, internal pull-up resistor enabled"
},
{
"number": "24",
"name": "PA14",
"type": "bidirectional",
"description": "Port A pin 14, 5V tolerant input/output configured as JTAG TCK or Serial Wire Debug SWCLK after reset, internal pull-down resistor enabled"
},
{
"number": "25",
"name": "PA15",
"type": "bidirectional",
"description": "Port A pin 15, 5V tolerant input/output configured as JTAG TDI after reset, internal pull-up resistor enabled"
},
{
"number": "26",
"name": "PB3",
"type": "bidirectional",
"description": "Port B pin 3, 5V tolerant input/output with analog capability configured as JTAG TDO or Serial Wire Debug trace after reset"
},
{
"number": "27",
"name": "PB4",
"type": "bidirectional",
"description": "Port B pin 4, 5V tolerant input/output with Fm+ capability configured as JTAG NTRST after reset, internal pull-up resistor enabled"
},
{
"number": "28",
"name": "PB5",
"type": "bidirectional",
"description": "Port B pin 5, 5V tolerant input/output for LPTIM1_IN1 or SPI1_MOSI"
},
{
"number": "29",
"name": "PB6",
"type": "bidirectional",
"description": "Port B pin 6, 5V tolerant input/output with Fm+ capability for USART1_TX or I2C1_SCL"
},
{
"number": "30",
"name": "PB7",
"type": "bidirectional",
"description": "Port B pin 7, 5V tolerant input/output with Fm+ capability for USART1_RX or I2C1_SDA"
},
{
"number": "31",
"name": "PH3/BOOT0",
"type": "bidirectional",
"description": "Port H pin 3, 5V tolerant input/output, functions as BOOT0 for boot mode selection between Flash and system memory"
},
{
"number": "32",
"name": "VSS",
"type": "power_in",
"description": "Ground (0V reference) for digital and analog 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: Pin 5 (VDDA/VREF+) combines analog power supply and positive reference voltage; verify that external; Debug/JTAG pins (23, 24, 25, 26, 27) have alternate functions after reset that should not conflict w; Pin 31 (PH3/BOOT0) function selection depends on voltage level during power-up; confirm boot mode re",
"exposed pad 33 added from the footprint"
],
"pages_sent": 80,
"cost_usd": 0.5544,
"at": "2026-10-06T16:47:18"
},
"datasheet": {
"url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588893407582294016",
"pages": 208,
"sha256": "71963de3cb899f8f",
"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"
}
},
"metadata": {
"specs": {
"Manufacturer": "STMicroelectronics",
"Package": "UFQFPN-32(5x5)",
"Category": "Embedded Processors & Controllers",
"Pins": "33"
}
},
"variants": [],
"sections": [
"hero",
"viewers",
"readme",
"breadcrumbs",
"info"
],
"discovery_triggers": [
"stm32l431kcu6tr"
],
"discovery_pitch": "STM32L431KCU6TR (STMicroelectronics) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
"author": {
"name": "Ray",
"email": "[email protected]"
},
"dependencies": {},
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