STM32G431CBT6 - Arm Cortex-M4 Microcontroller

{
  "schema_version": 1,
  "type": "component",
  "slug": "stm32g431cbt6",
  "title": "STM32G431CBT6 - Arm Cortex-M4 Microcontroller",
  "brief": "STMicroelectronics Microcontrollers (MCU/MPU/SOC), LQFP-48(7x7). Pinout checked against ST's open pin data, KiCad symbol/footprint/3D.",
  "version": "0.3.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "mcu",
    "stm32g431cbt6"
  ],
  "component": {
    "mpn": "STM32G431CBT6",
    "manufacturer": "STMicroelectronics",
    "package": "LQFP-48(7x7)",
    "pin_count": 48,
    "category": "MCU",
    "subcategory": "Microcontrollers (MCU/MPU/SOC)",
    "datasheet": "https://www.st.com/resource/en/datasheet/stm32g431cbt6.pdf",
    "parts": {
      "symbol": "stm32g431cbt6.kicad_sym",
      "footprint": "stm32g431cbt6.kicad_mod",
      "model_3d": "stm32g431cbt6-hero.glb",
      "model_3d_plain": "stm32g431cbt6-etched.glb",
      "model_3d_step": "stm32g431cbt6-etched.step",
      "model_3d_step_plain": "stm32g431cbt6.step",
      "step": "stm32g431cbt6-etched.step",
      "lbr": "stm32g431cbt6.lbr",
      "datasheet": "docs/stm32g431cbt6-datasheet.pdf"
    },
    "distributor_links": {
      "mouser": {
        "part": "511-STM32G431CBT6",
        "url": "https://www.mouser.com/en/ProductDetail/STMicroelectronics/STM32G431CBT6?qs=T3oQrply3y8OocyGDXq5wg%3D%3D",
        "stock": 27,
        "checked": "2026-10-19"
      },
      "digikey": {
        "part": "497-19473-ND",
        "url": "https://www.digikey.com/en/products/detail/stmicroelectronics/STM32G431CBT6/10231567",
        "stock": 57,
        "checked": "2026-10-19"
      },
      "lcsc": {
        "part": "C529355",
        "url": "https://www.lcsc.com/product-detail/C529355.html",
        "stock": 1257,
        "checked": "2026-10-19"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "VBAT",
        "type": "power_in",
        "description": "Backup supply for RTC and backup registers when VDD is off. Connect to VDD or a battery (1.55 V to 3.6 V)."
      },
      {
        "number": "2",
        "name": "PC13",
        "type": "bidirectional",
        "description": "General-purpose 5V-tolerant I/O in Backup domain (limited drive: max 2 MHz / 30 pF via power switch). Alternate: TIM1_BKIN, TIM1_CH1N, TIM8_CH4N, EVENTOUT. Additional: WKUP2, RTC_TAMP1, RTC_TS, RTC_OUT1."
      },
      {
        "number": "3",
        "name": "PC14-OSC32_IN",
        "type": "bidirectional",
        "description": "Backup-domain 5V-tolerant GPIO doubling as LSE 32.768 kHz crystal input (OSC32_IN). Same drive limits as PC13."
      },
      {
        "number": "4",
        "name": "PC15-OSC32_OUT",
        "type": "bidirectional",
        "description": "Backup-domain 5V-tolerant GPIO doubling as LSE 32.768 kHz crystal output (OSC32_OUT). Same drive limits as PC13."
      },
      {
        "number": "5",
        "name": "PF0-OSC_IN",
        "type": "input",
        "description": "HSE crystal oscillator input (OSC_IN), 4-48 MHz, or input-only 5V-tolerant Fm+ I/O PF0. Alternate: I2C2_SDA, SPI2_NSS/I2S2_WS, TIM1_CH3N, EVENTOUT. Additional: ADC1_IN10."
      },
      {
        "number": "6",
        "name": "PF1-OSC_OUT",
        "type": "output",
        "description": "HSE crystal oscillator output (OSC_OUT) or output-only 5V-tolerant I/O PF1. Alternate: SPI2_SCK/I2S2_CK, EVENTOUT. Additional: ADC2_IN10, COMP3_INM."
      },
      {
        "number": "7",
        "name": "PG10-NRST",
        "type": "bidirectional",
        "description": "Bidirectional device reset with embedded weak pull-up (active low). Also selectable as GPIO PG10 with MCO/EVENTOUT alternate."
      },
      {
        "number": "8",
        "name": "PA0",
        "type": "bidirectional",
        "description": "3.6 V tolerant analog-capable I/O (TT_a). Alternate: TIM2_CH1, USART2_CTS, COMP1_OUT, TIM8_BKIN/ETR, TIM2_ETR, EVENTOUT. Additional: ADC12_IN1, COMP1_INM, COMP3_INP, RTC_TAMP2, WKUP1."
      },
      {
        "number": "9",
        "name": "PA1",
        "type": "bidirectional",
        "description": "3.6 V tolerant analog-capable I/O. Alternate: TIM2_CH2, USART2_RTS_DE, TIM15_CH1N, EVENTOUT. Additional: RTC_REFIN, ADC12_IN2, COMP1_INP, OPAMP1_VINP, OPAMP3_VINP."
      },
      {
        "number": "10",
        "name": "PA2",
        "type": "bidirectional",
        "description": "3.6 V tolerant analog-capable I/O. Alternate: TIM2_CH3, USART2_TX, COMP2_OUT, TIM15_CH1, LPUART1_TX, UCPD1_FRSTX, EVENTOUT. Additional: ADC1_IN3, COMP2_INM, OPAMP1_VOUT, WKUP4/LSCO."
      },
      {
        "number": "11",
        "name": "PA3",
        "type": "bidirectional",
        "description": "3.6 V tolerant analog-capable I/O. Alternate: TIM2_CH4, SAI1_CK1, USART2_RX, TIM15_CH2, LPUART1_RX, SAI1_MCLK_A, EVENTOUT. Additional: ADC1_IN4, COMP2_INP, OPAMP1_VINM/VINP."
      },
      {
        "number": "12",
        "name": "PA4",
        "type": "bidirectional",
        "description": "3.6 V tolerant analog-capable I/O. Alternate: TIM3_CH2, SPI1_NSS, SPI3_NSS/I2S3_WS, USART2_CK, SAI1_FS_B, EVENTOUT. Additional: ADC2_IN17, DAC1_OUT1, COMP1_INM."
      },
      {
        "number": "13",
        "name": "PA5",
        "type": "bidirectional",
        "description": "3.6 V tolerant analog-capable I/O. Alternate: TIM2_CH1, TIM2_ETR, SPI1_SCK, UCPD1_FRSTX, EVENTOUT. Additional: ADC2_IN13, DAC1_OUT2, COMP2_INM, OPAMP2_VINM."
      },
      {
        "number": "14",
        "name": "PA6",
        "type": "bidirectional",
        "description": "3.6 V tolerant analog-capable I/O. Alternate: TIM16_CH1, TIM3_CH1, TIM8_BKIN, SPI1_MISO, TIM1_BKIN, COMP1_OUT, LPUART1_CTS, EVENTOUT. Additional: ADC2_IN3, OPAMP2_VOUT."
      },
      {
        "number": "15",
        "name": "PA7",
        "type": "bidirectional",
        "description": "3.6 V tolerant analog-capable I/O. Alternate: TIM17_CH1, TIM3_CH2, TIM8_CH1N, SPI1_MOSI, TIM1_CH1N, COMP2_OUT, UCPD1_FRSTX, EVENTOUT. Additional: ADC2_IN4, COMP2_INP, OPAMP1_VINP, OPAMP2_VINP."
      },
      {
        "number": "16",
        "name": "PB0",
        "type": "bidirectional",
        "description": "3.6 V tolerant analog-capable I/O. Alternate: TIM3_CH3, TIM8_CH2N, TIM1_CH2N, UCPD1_FRSTX, EVENTOUT. Additional: ADC1_IN15, COMP4_INP, OPAMP2_VINP, OPAMP3_VINP."
      },
      {
        "number": "17",
        "name": "PB1",
        "type": "bidirectional",
        "description": "3.6 V tolerant analog-capable I/O. Alternate: TIM3_CH4, TIM8_CH3N, TIM1_CH3N, COMP4_OUT, LPUART1_RTS_DE, EVENTOUT. Additional: ADC1_IN12, COMP1_INP, OPAMP3_VOUT."
      },
      {
        "number": "18",
        "name": "PB2",
        "type": "bidirectional",
        "description": "3.6 V tolerant analog-capable I/O. Alternate: RTC_OUT2, LPTIM1_OUT, I2C3_SMBA, EVENTOUT. Additional: ADC2_IN12, COMP4_INM, OPAMP3_VINM."
      },
      {
        "number": "19",
        "name": "VSSA",
        "type": "power_in",
        "description": "Analog ground reference for ADC/DAC/comparators/OPAMP/VREF. Tie to system ground plane."
      },
      {
        "number": "20",
        "name": "VREF+",
        "type": "power_in",
        "description": "Positive reference voltage for ADC and DAC, or output of the internal VREFBUF (2.048 V / 2.5 V / 2.95 V). Bypass close to the pin."
      },
      {
        "number": "21",
        "name": "VDDA",
        "type": "power_in",
        "description": "Analog supply for ADC/DAC/comparators/OPAMPs/VREFBUF, 1.71 V to 3.6 V. Must be present and stable before enabling analog blocks."
      },
      {
        "number": "22",
        "name": "PB10",
        "type": "bidirectional",
        "description": "3.6 V tolerant analog-capable I/O. Alternate: TIM2_CH3, USART3_TX, LPUART1_RX, TIM1_BKIN, SAI1_SCK_A, EVENTOUT. Additional: OPAMP3_VINM."
      },
      {
        "number": "23",
        "name": "VSS",
        "type": "power_in",
        "description": "Digital ground. Tie to system ground plane."
      },
      {
        "number": "24",
        "name": "VDD",
        "type": "power_in",
        "description": "Main digital supply, 1.71 V to 3.6 V. Decouple locally with 100 nF and share bulk cap with the other VDD pins."
      },
      {
        "number": "25",
        "name": "PB11",
        "type": "bidirectional",
        "description": "5 V tolerant analog-capable I/O. Alternate: TIM2_CH4, USART3_RX, LPUART1_TX, EVENTOUT. Additional: ADC12_IN14."
      },
      {
        "number": "26",
        "name": "PB12",
        "type": "bidirectional",
        "description": "5 V tolerant analog-capable I/O. Alternate: I2C2_SMBA, SPI2_NSS/I2S2_WS, TIM1_BKIN, USART3_CK, LPUART1_RTS_DE, EVENTOUT. Additional: ADC1_IN11."
      },
      {
        "number": "27",
        "name": "PB13",
        "type": "bidirectional",
        "description": "3.6 V tolerant analog-capable I/O. Alternate: SPI2_SCK/I2S2_CK, TIM1_CH1N, USART3_CTS, LPUART1_CTS, EVENTOUT. Additional: OPAMP3_VINP."
      },
      {
        "number": "28",
        "name": "PB14",
        "type": "bidirectional",
        "description": "3.6 V tolerant analog-capable I/O. Alternate: TIM15_CH1, SPI2_MISO, TIM1_CH2N, USART3_RTS_DE, COMP4_OUT, EVENTOUT. Additional: ADC1_IN5, OPAMP2_VINP."
      },
      {
        "number": "29",
        "name": "PB15",
        "type": "bidirectional",
        "description": "5 V tolerant analog-capable I/O. Alternate: RTC_REFIN, TIM15_CH2, TIM15_CH1N, COMP3_OUT, TIM1_CH3N, SPI2_MOSI/I2S2_SD, EVENTOUT. Additional: ADC2_IN15."
      },
      {
        "number": "30",
        "name": "PA8",
        "type": "bidirectional",
        "description": "5 V tolerant Fm+ I/O. Alternate: MCO, I2C3_SCL, I2C2_SDA, I2S2_MCK, TIM1_CH1, USART1_CK, TIM4_ETR, SAI1_CK2, SAI1_SCK_A, EVENTOUT."
      },
      {
        "number": "31",
        "name": "PA9",
        "type": "bidirectional",
        "description": "5 V tolerant Fm+ USB Type-C dead-battery-capable I/O. Alternate: I2C3_SMBA, I2C2_SCL, I2S3_MCK, TIM1_CH2, USART1_TX, TIM15_BKIN, TIM2_CH3, SAI1_FS_A, EVENTOUT. Additional: UCPD1_DBCC1."
      },
      {
        "number": "32",
        "name": "PA10",
        "type": "bidirectional",
        "description": "5 V tolerant USB Type-C dead-battery-capable analog-capable I/O. Alternate: TIM17_BKIN, USB_CRS_SYNC, I2C2_SMBA, SPI2_MISO, TIM1_CH3, USART1_RX, TIM2_CH4, TIM8_BKIN, SAI1_D1/SD_A, EVENTOUT. Additional: UCPD1_DBCC2."
      },
      {
        "number": "33",
        "name": "PA11",
        "type": "bidirectional",
        "description": "USB full-speed D- (USB_DM) additional function; also 5 V tolerant I/O with alternates SPI2_MOSI/I2S2_SD, TIM1_CH1N, USART1_CTS, COMP1_OUT, FDCAN1_RX, TIM4_CH1, TIM1_CH4, TIM1_BKIN2, EVENTOUT."
      },
      {
        "number": "34",
        "name": "PA12",
        "type": "bidirectional",
        "description": "USB full-speed D+ (USB_DP) additional function; also 5 V tolerant I/O with alternates TIM16_CH1, I2SCKIN, TIM1_CH2N, USART1_RTS_DE, COMP2_OUT, FDCAN1_TX, TIM4_CH2, TIM1_ETR, EVENTOUT."
      },
      {
        "number": "35",
        "name": "VSS",
        "type": "power_in",
        "description": "Digital ground. Tie to system ground plane."
      },
      {
        "number": "36",
        "name": "VDD",
        "type": "power_in",
        "description": "Main digital supply, 1.71 V to 3.6 V. Decouple locally with 100 nF."
      },
      {
        "number": "37",
        "name": "PA13",
        "type": "bidirectional",
        "description": "SWDIO / JTMS debug pin (default after reset, weak pull-up). Also 5 V tolerant Fm+ I/O with alternates TIM16_CH1N, I2C1_SCL, IR_OUT, USART3_CTS, TIM4_CH3, SAI1_SD_B, EVENTOUT."
      },
      {
        "number": "38",
        "name": "PA14",
        "type": "bidirectional",
        "description": "SWCLK / JTCK debug pin (default after reset, internal pull-down). Also 5 V tolerant Fm+ I/O with alternates LPTIM1_OUT, I2C1_SDA, TIM8_CH2, TIM1_BKIN, USART2_TX, SAI1_FS_B, EVENTOUT."
      },
      {
        "number": "39",
        "name": "PA15",
        "type": "bidirectional",
        "description": "JTDI debug pin at reset (weak pull-up); reconfigurable to 5 V tolerant Fm+ GPIO with alternates TIM2_CH1, TIM8_CH1, I2C1_SCL, SPI1_NSS, SPI3_NSS/I2S3_WS, USART2_RX, UART4_RTS_DE, TIM1_BKIN, TIM2_ETR, EVENTOUT."
      },
      {
        "number": "40",
        "name": "PB3",
        "type": "bidirectional",
        "description": "JTDO/TRACESWO debug pin at reset; also 5 V tolerant I/O with alternates TIM2_CH2, TIM4_ETR, USB_CRS_SYNC, TIM8_CH1N, SPI1_SCK, SPI3_SCK/I2S3_CK, USART2_TX, TIM3_ETR, SAI1_SCK_B, EVENTOUT."
      },
      {
        "number": "41",
        "name": "PB4",
        "type": "bidirectional",
        "description": "JTRST debug pin at reset; also 5 V tolerant USB Type-C capable I/O with alternates TIM16_CH1, TIM3_CH1, TIM8_CH2N, SPI1_MISO, SPI3_MISO, USART2_RX, TIM17_BKIN, SAI1_MCLK_B, EVENTOUT. Additional: UCPD1_CC2."
      },
      {
        "number": "42",
        "name": "PB5",
        "type": "bidirectional",
        "description": "5 V tolerant Fm+ I/O. Alternate: TIM16_BKIN, TIM3_CH2, TIM8_CH3N, I2C1_SMBA, SPI1_MOSI, SPI3_MOSI/I2S3_SD, USART2_CK, I2C3_SDA, TIM17_CH1, LPTIM1_IN1, SAI1_SD_B, EVENTOUT."
      },
      {
        "number": "43",
        "name": "PB6",
        "type": "bidirectional",
        "description": "5 V tolerant USB Type-C capable I/O. Alternate: TIM16_CH1N, TIM4_CH1, TIM8_CH1, TIM8_ETR, USART1_TX, COMP4_OUT, TIM8_BKIN2, LPTIM1_ETR, SAI1_FS_B, EVENTOUT. Additional: UCPD1_CC1."
      },
      {
        "number": "44",
        "name": "PB7",
        "type": "bidirectional",
        "description": "5 V tolerant Fm+ I/O. Alternate: TIM17_CH1N, TIM4_CH2, I2C1_SDA, TIM8_BKIN, USART1_RX, COMP3_OUT, TIM3_CH4, LPTIM1_IN2, UART4_CTS, EVENTOUT. Additional: PVD_IN."
      },
      {
        "number": "45",
        "name": "PB8-BOOT0",
        "type": "bidirectional",
        "description": "Dedicated BOOT0 selection pin at power-up (samples boot mode); afterwards a 5 V tolerant Fm+ GPIO PB8 with alternates TIM16_CH1, TIM4_CH3, SAI1_CK1, I2C1_SCL, USART3_RX, COMP1_OUT, FDCAN1_RX, TIM8_CH2, TIM1_BKIN, SAI1_MCLK_A, EVENTOUT."
      },
      {
        "number": "46",
        "name": "PB9",
        "type": "bidirectional",
        "description": "5 V tolerant Fm+ I/O. Alternate: TIM17_CH1, TIM4_CH4, SAI1_D2, I2C1_SDA, IR_OUT, USART3_TX, COMP2_OUT, FDCAN1_TX, TIM8_CH3, TIM1_CH3N, SAI1_FS_A, EVENTOUT."
      },
      {
        "number": "47",
        "name": "VSS",
        "type": "power_in",
        "description": "Digital ground. Tie to system ground plane."
      },
      {
        "number": "48",
        "name": "VDD",
        "type": "power_in",
        "description": "Main digital supply, 1.71 V to 3.6 V. Decouple locally with 100 nF."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
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        "url": "https://www.st.com/resource/en/datasheet/stm32g431cbt6.pdf",
        "pages": 200,
        "sha256": "cabefb21b47dc4c1",
        "source_tier": "mfr"
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      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 48,
        "described": 48,
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        "refuses_to_fabricate": true
      }
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    "pin1": {
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      "corner": "top-left",
      "source": "silk-marker",
      "derived_from": "LQFP-48_7x7mm_P0.5mm@sha256:1ccc5ad4d95398a4",
      "mark": "drawn"
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    "mcu": {
      "part_number": "STM32G431CBT6",
      "series": "STM32G4",
      "subfamily": "STM32G431",
      "core": "Arm Cortex-M4",
      "frequency_mhz": 170,
      "flash_kb": 128,
      "ram_kb": 32,
      "io_count": 38,
      "package": "LQFP 48 7x7x1.4 mm",
      "marketing_status": "Active",
      "fpu": "Single-precision FPU",
      "supply_v_min": 1.71,
      "supply_v_max": 3.6,
      "temp_min_c": -40,
      "temp_max_c": 85,
      "adc_count": 2,
      "timers": 10,
      "in_distributor_stock": true,
      "product_folder": "/en/microcontrollers-microprocessors/stm32g431cb.html",
      "source": "st.com portfolio grid CL1734"
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      "tooltips": "authored"
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    "models": "models.json",
    "lod": "lod/manifest.json",
    "marking": {
      "lines": [
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        "Y WW",
        "R"
      ],
      "source": "ST DS12589 Rev 2 (October 2019), STM32G431x6/x8/xB datasheet, p.177 (6.4 LQFP48 device marking, Figure 51 LQFP48 top view example)",
      "surface": "top",
      "colour": "light on black epoxy",
      "gate": "PASS",
      "provenance": "provenance/3d-model.json"
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    "body_size": {
      "x_mm": 7,
      "y_mm": 7,
      "z_mm": 1.5,
      "pitch_mm": 0.5
    }
  },
  "metadata": {
    "specs": {
      "Core": "Arm Cortex-M4",
      "Max clock": "170 MHz",
      "Flash": "128 kB",
      "RAM": "32 kB",
      "I/O pins": 38,
      "ADC units": 2,
      "ST status": "Active",
      "Manufacturer": "STMicroelectronics",
      "Package": "LQFP-48(7x7)",
      "Category": "MCU",
      "Pins": "48"
    }
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  "author": {
    "name": "Ray"
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    }
  ],
  "updated_at": "2026-09-25T08:50:44.299Z"
}