STM32F303RBT6

{
  "schema_version": 1,
  "type": "component",
  "slug": "stm32f303rbt6",
  "title": "STM32F303RBT6",
  "brief": "STMicroelectronics Microcontrollers (MCU/MPU/SOC), LQFP-64(10x10). Pinout checked against ST's open pin data, KiCad symbol/footprint/3D.",
  "version": "0.2.1",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "mcu",
    "stm32f303rbt6"
  ],
  "component": {
    "mpn": "STM32F303RBT6",
    "manufacturer": "STMicroelectronics",
    "package": "LQFP-64(10x10)",
    "pin_count": 64,
    "category": "MCU",
    "subcategory": "Microcontrollers (MCU/MPU/SOC)",
    "datasheet": "https://www.st.com/resource/en/datasheet/stm32f303rbt6.pdf",
    "parts": {
      "symbol": "stm32f303rbt6.kicad_sym",
      "footprint": "stm32f303rbt6.kicad_mod",
      "model_3d": "stm32f303rbt6-etched.glb",
      "model_3d_plain": "stm32f303rbt6.glb",
      "model_3d_step": "stm32f303rbt6-etched.step",
      "model_3d_step_plain": "stm32f303rbt6.step",
      "lbr": "stm32f303rbt6.lbr"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "VBAT",
        "type": "power_in",
        "description": "Backup supply pin for RTC, LSE oscillator and backup registers (1.65-3.6 V) when VDD is removed."
      },
      {
        "number": "2",
        "name": "PC13",
        "type": "bidirectional",
        "description": "General-purpose I/O (TC, 3.3 V). Backup-domain pin; supplied through the power switch, output limited to 3 mA / 2 MHz / 30 pF. Alt: TIM1_CH1N. Add'l: WKUP2, RTC_TAMP1, RTC_TS, RTC_OUT."
      },
      {
        "number": "3",
        "name": "PC14-OSC32_IN",
        "type": "bidirectional",
        "description": "GPIO PC14 (TC, 3.3 V) or LSE 32.768 kHz crystal input (OSC32_IN). Backup-domain, output current limited."
      },
      {
        "number": "4",
        "name": "PC15-OSC32_OUT",
        "type": "bidirectional",
        "description": "GPIO PC15 (TC, 3.3 V) or LSE 32.768 kHz crystal output (OSC32_OUT). Backup-domain, output current limited."
      },
      {
        "number": "5",
        "name": "PF0-OSC_IN",
        "type": "bidirectional",
        "description": "GPIO PF0 (FTf, 5 V-tolerant, FM+ capable) or HSE 4-32 MHz crystal input (OSC_IN). Alt: TIM1_CH3N, I2C2_SDA."
      },
      {
        "number": "6",
        "name": "PF1-OSC_OUT",
        "type": "bidirectional",
        "description": "GPIO PF1 (FTf, 5 V-tolerant, FM+ capable) or HSE 4-32 MHz crystal output (OSC_OUT). Alt: I2C2_SCL."
      },
      {
        "number": "7",
        "name": "NRST",
        "type": "input",
        "description": "Device reset input / open-drain internal reset output, active low. Embedded weak pull-up."
      },
      {
        "number": "8",
        "name": "PC0",
        "type": "bidirectional",
        "description": "GPIO (TTa, 3.3 V tolerant, direct to ADC). Add'l: ADC12_IN6, COMP7_INM. Alt: EVENTOUT."
      },
      {
        "number": "9",
        "name": "PC1",
        "type": "bidirectional",
        "description": "GPIO (TTa). Add'l: ADC12_IN7, COMP7_INP. Alt: EVENTOUT."
      },
      {
        "number": "10",
        "name": "PC2",
        "type": "bidirectional",
        "description": "GPIO (TTa). Add'l: ADC12_IN8. Alt: COMP7_OUT, EVENTOUT."
      },
      {
        "number": "11",
        "name": "PC3",
        "type": "bidirectional",
        "description": "GPIO (TTa). Add'l: ADC12_IN9. Alt: TIM1_BKIN2, EVENTOUT."
      },
      {
        "number": "12",
        "name": "VSSA/VREF-",
        "type": "power_in",
        "description": "Analog ground and negative ADC/DAC reference. On the LQFP64, VREF- is bonded to VSSA."
      },
      {
        "number": "13",
        "name": "VDDA/VREF+",
        "type": "power_in",
        "description": "Analog supply and positive ADC/DAC/OPAMP/COMP reference (2.0-3.6 V). On the LQFP64, VREF+ is internally connected to VDDA."
      },
      {
        "number": "14",
        "name": "PA0",
        "type": "bidirectional",
        "description": "GPIO (TTa). Alt: USART2_CTS, TIM2_CH1_ETR, TIM8_BKIN, TIM8_ETR, TSC_G1_IO1, COMP1_OUT, EVENTOUT. Add'l: ADC1_IN1, COMP1_INM, RTC_TAMP2, WKUP1, COMP7_INP."
      },
      {
        "number": "15",
        "name": "PA1",
        "type": "bidirectional",
        "description": "GPIO (TTa). Alt: USART2_RTS_DE, TIM2_CH2, TSC_G1_IO2, TIM15_CH1N, RTC_REFIN, EVENTOUT. Add'l: ADC1_IN2, COMP1_INP, OPAMP1_VINP, OPAMP3_VINP."
      },
      {
        "number": "16",
        "name": "PA2",
        "type": "bidirectional",
        "description": "GPIO (TTa, fast ADC channel, reduced touch sensitivity). Alt: USART2_TX, TIM2_CH3, TIM15_CH1, TSC_G1_IO3, COMP2_OUT, EVENTOUT. Add'l: ADC1_IN3, COMP2_INM, OPAMP1_VOUT."
      },
      {
        "number": "17",
        "name": "PA3",
        "type": "bidirectional",
        "description": "GPIO (TTa, fast ADC channel). Alt: USART2_RX, TIM2_CH4, TIM15_CH2, TSC_G1_IO4, EVENTOUT. Add'l: ADC1_IN4, OPAMP1_VINP, COMP2_INP, OPAMP1_VINM."
      },
      {
        "number": "18",
        "name": "PF4",
        "type": "bidirectional",
        "description": "GPIO (TTa, fast ADC channel). Alt: COMP1_OUT, EVENTOUT. Add'l: ADC1_IN5."
      },
      {
        "number": "19",
        "name": "VDD",
        "type": "power_in",
        "description": "Digital power supply (2.0-3.6 V)."
      },
      {
        "number": "20",
        "name": "PA4",
        "type": "bidirectional",
        "description": "GPIO (TTa, fast ADC channel, reduced touch sensitivity). Alt: SPI1_NSS, SPI3_NSS/I2S3_WS, USART2_CK, TSC_G2_IO1, TIM3_CH2, EVENTOUT. Add'l: ADC2_IN1, DAC1_OUT1, OPAMP4_VINP, COMP1/2/3/4/5/6/7_INM."
      },
      {
        "number": "21",
        "name": "PA5",
        "type": "bidirectional",
        "description": "GPIO (TTa, fast ADC channel, reduced touch sensitivity). Alt: SPI1_SCK, TIM2_CH1_ETR, TSC_G2_IO2, EVENTOUT. Add'l: ADC2_IN2, DAC1_OUT2, OPAMP1/2/3_VINP, COMP1/2/3/4/5/6/7_INM."
      },
      {
        "number": "22",
        "name": "PA6",
        "type": "bidirectional",
        "description": "GPIO (TTa, fast ADC channel). Alt: SPI1_MISO, TIM3_CH1, TIM8_BKIN, TIM1_BKIN, TIM16_CH1, COMP1_OUT, TSC_G2_IO3, EVENTOUT. Add'l: ADC2_IN3, OPAMP2_VOUT."
      },
      {
        "number": "23",
        "name": "PA7",
        "type": "bidirectional",
        "description": "GPIO (TTa). Alt: SPI1_MOSI, TIM3_CH2, TIM17_CH1, TIM1_CH1N, TIM8_CH1N, TSC_G2_IO4, COMP2_OUT, EVENTOUT. Add'l: ADC2_IN4, COMP2_INP, OPAMP2_VINP, OPAMP1_VINP."
      },
      {
        "number": "24",
        "name": "PC4",
        "type": "bidirectional",
        "description": "GPIO (TTa, fast ADC channel). Alt: USART1_TX, EVENTOUT. Add'l: ADC2_IN5."
      },
      {
        "number": "25",
        "name": "PC5",
        "type": "bidirectional",
        "description": "GPIO (TTa). Alt: USART1_RX, TSC_G3_IO1, EVENTOUT. Add'l: ADC2_IN11, OPAMP2_VINM, OPAMP1_VINM."
      },
      {
        "number": "26",
        "name": "PB0",
        "type": "bidirectional",
        "description": "GPIO (TTa). Alt: TIM3_CH3, TIM1_CH2N, TIM8_CH2N, TSC_G3_IO2, EVENTOUT. Add'l: ADC3_IN12, COMP4_INP, OPAMP3_VINP, OPAMP2_VINP."
      },
      {
        "number": "27",
        "name": "PB1",
        "type": "bidirectional",
        "description": "GPIO (TTa, fast ADC channel, reduced touch sensitivity). Alt: TIM3_CH4, TIM1_CH3N, TIM8_CH3N, COMP4_OUT, TSC_G3_IO3, EVENTOUT. Add'l: ADC3_IN1, OPAMP3_VOUT."
      },
      {
        "number": "28",
        "name": "PB2",
        "type": "bidirectional",
        "description": "GPIO (TTa). Alt: TSC_G3_IO4, EVENTOUT. Add'l: ADC2_IN12, COMP4_INM, OPAMP3_VINM."
      },
      {
        "number": "29",
        "name": "PB10",
        "type": "bidirectional",
        "description": "GPIO (TTa). Alt: USART3_TX, TIM2_CH3, TSC_SYNC, EVENTOUT. Add'l: COMP5_INM, OPAMP4_VINM, OPAMP3_VINM."
      },
      {
        "number": "30",
        "name": "PB11",
        "type": "bidirectional",
        "description": "GPIO (TTa). Alt: USART3_RX, TIM2_CH4, TSC_G6_IO1, EVENTOUT. Add'l: COMP6_INP, OPAMP4_VINP."
      },
      {
        "number": "31",
        "name": "VSS",
        "type": "power_in",
        "description": "Digital ground."
      },
      {
        "number": "32",
        "name": "VDD",
        "type": "power_in",
        "description": "Digital power supply (2.0-3.6 V)."
      },
      {
        "number": "33",
        "name": "PB12",
        "type": "bidirectional",
        "description": "GPIO (TTa, fast ADC channel, reduced touch sensitivity). Alt: SPI2_NSS/I2S2_WS, I2C2_SMBA, USART3_CK, TIM1_BKIN, TSC_G6_IO2, EVENTOUT. Add'l: ADC4_IN3, COMP3_INM, OPAMP4_VOUT."
      },
      {
        "number": "34",
        "name": "PB13",
        "type": "bidirectional",
        "description": "GPIO (TTa, fast ADC channel). Alt: SPI2_SCK/I2S2_CK, USART3_CTS, TIM1_CH1N, TSC_G6_IO3, EVENTOUT. Add'l: ADC3_IN5, COMP5_INP, OPAMP4_VINP, OPAMP3_VINP."
      },
      {
        "number": "35",
        "name": "PB14",
        "type": "bidirectional",
        "description": "GPIO (TTa, fast ADC channel). Alt: SPI2_MISO/I2S2ext_SD, USART3_RTS_DE, TIM1_CH2N, TIM15_CH1, TSC_G6_IO4, EVENTOUT. Add'l: COMP3_INP, ADC4_IN4, OPAMP2_VINP."
      },
      {
        "number": "36",
        "name": "PB15",
        "type": "bidirectional",
        "description": "GPIO (TTa, fast ADC channel). Alt: SPI2_MOSI/I2S2_SD, TIM1_CH3N, RTC_REFIN, TIM15_CH1N, TIM15_CH2, EVENTOUT. Add'l: ADC4_IN5, COMP6_INM."
      },
      {
        "number": "37",
        "name": "PC6",
        "type": "bidirectional",
        "description": "GPIO (FT, 5 V-tolerant). Alt: I2S2_MCK, COMP6_OUT, TIM8_CH1, TIM3_CH1, EVENTOUT."
      },
      {
        "number": "38",
        "name": "PC7",
        "type": "bidirectional",
        "description": "GPIO (FT). Alt: I2S3_MCK, TIM8_CH2, TIM3_CH2, COMP5_OUT, EVENTOUT."
      },
      {
        "number": "39",
        "name": "PC8",
        "type": "bidirectional",
        "description": "GPIO (FT). Alt: TIM8_CH3, TIM3_CH3, COMP3_OUT, EVENTOUT."
      },
      {
        "number": "40",
        "name": "PC9",
        "type": "bidirectional",
        "description": "GPIO (FT). Alt: TIM8_CH4, TIM8_BKIN2, TIM3_CH4, I2S_CKIN, EVENTOUT."
      },
      {
        "number": "41",
        "name": "PA8",
        "type": "bidirectional",
        "description": "GPIO (FT). Alt: I2C2_SMBA, I2S2_MCK, USART1_CK, TIM1_CH1, TIM4_ETR, MCO (main clock output), COMP3_OUT, EVENTOUT."
      },
      {
        "number": "42",
        "name": "PA9",
        "type": "bidirectional",
        "description": "GPIO (FTf, 5 V-tolerant, FM+ capable). Alt: I2C2_SCL, I2S3_MCK, USART1_TX, TIM1_CH2, TIM2_CH3, TIM15_BKIN, TSC_G4_IO1, COMP5_OUT, EVENTOUT."
      },
      {
        "number": "43",
        "name": "PA10",
        "type": "bidirectional",
        "description": "GPIO (FTf). Alt: I2C2_SDA, USART1_RX, TIM1_CH3, TIM2_CH4, TIM8_BKIN, TIM17_BKIN, TSC_G4_IO2, COMP6_OUT, EVENTOUT."
      },
      {
        "number": "44",
        "name": "PA11",
        "type": "bidirectional",
        "description": "GPIO (FT). Alt: USART1_CTS, USB_DM (USB 2.0 FS D-), CAN_RX, TIM1_CH1N, TIM1_CH4, TIM1_BKIN2, TIM4_CH1, COMP1_OUT, EVENTOUT."
      },
      {
        "number": "45",
        "name": "PA12",
        "type": "bidirectional",
        "description": "GPIO (FT). Alt: USART1_RTS_DE, USB_DP (USB 2.0 FS D+), CAN_TX, TIM1_CH2N, TIM1_ETR, TIM4_CH2, TIM16_CH1, COMP2_OUT, EVENTOUT."
      },
      {
        "number": "46",
        "name": "PA13",
        "type": "bidirectional",
        "description": "GPIO (FT). Default after reset: SWDIO-JTMS (SWD data / JTAG TMS). Alt: USART3_CTS, TIM4_CH3, TIM16_CH1N, TSC_G4_IO3, IR_OUT, SWDIO-JTMS, EVENTOUT."
      },
      {
        "number": "47",
        "name": "VSS",
        "type": "power_in",
        "description": "Digital ground."
      },
      {
        "number": "48",
        "name": "VDD",
        "type": "power_in",
        "description": "Digital power supply (2.0-3.6 V)."
      },
      {
        "number": "49",
        "name": "PA14",
        "type": "bidirectional",
        "description": "GPIO (FTf). Default after reset: SWCLK-JTCK. Alt: I2C1_SDA, USART2_TX, TIM8_CH2, TIM1_BKIN, TSC_G4_IO4, SWCLK-JTCK, EVENTOUT."
      },
      {
        "number": "50",
        "name": "PA15",
        "type": "bidirectional",
        "description": "GPIO (FTf). Default after reset: JTDI. Alt: I2C1_SCL, SPI1_NSS, SPI3_NSS/I2S3_WS, JTDI, USART2_RX, TIM1_BKIN, TIM2_CH1_ETR, TIM8_CH1, EVENTOUT."
      },
      {
        "number": "51",
        "name": "PC10",
        "type": "bidirectional",
        "description": "GPIO (FT). Alt: SPI3_SCK, I2S3_CK, USART3_TX, UART4_TX, TIM8_CH1N, EVENTOUT."
      },
      {
        "number": "52",
        "name": "PC11",
        "type": "bidirectional",
        "description": "GPIO (FT). Alt: SPI3_MISO, I2S3ext_SD, USART3_RX, UART4_RX, TIM8_CH2N, EVENTOUT."
      },
      {
        "number": "53",
        "name": "PC12",
        "type": "bidirectional",
        "description": "GPIO (FT). Alt: SPI3_MOSI, I2S3_SD, USART3_CK, UART5_TX, TIM8_CH3N, EVENTOUT."
      },
      {
        "number": "54",
        "name": "PD2",
        "type": "bidirectional",
        "description": "GPIO (FT). Alt: UART5_RX, TIM3_ETR, TIM8_BKIN, EVENTOUT."
      },
      {
        "number": "55",
        "name": "PB3",
        "type": "bidirectional",
        "description": "GPIO (FT). Default after reset: JTDO-TRACESWO. Alt: SPI3_SCK, I2S3_CK, SPI1_SCK, USART2_TX, TIM2_CH2, TIM3_ETR, TIM4_ETR, TIM8_CH1N, TSC_G5_IO1, JTDO-TRACESWO, EVENTOUT."
      },
      {
        "number": "56",
        "name": "PB4",
        "type": "bidirectional",
        "description": "GPIO (FT). Default after reset: NJTRST. Alt: SPI3_MISO, I2S3ext_SD, SPI1_MISO, USART2_RX, TIM3_CH1, TIM16_CH1, TIM17_BKIN, TIM8_CH2N, TSC_G5_IO2, NJTRST, EVENTOUT."
      },
      {
        "number": "57",
        "name": "PB5",
        "type": "bidirectional",
        "description": "GPIO (FT). Alt: SPI3_MOSI, SPI1_MOSI, I2S3_SD, I2C1_SMBA, USART2_CK, TIM16_BKIN, TIM3_CH2, TIM8_CH3N, TIM17_CH1, EVENTOUT."
      },
      {
        "number": "58",
        "name": "PB6",
        "type": "bidirectional",
        "description": "GPIO (FTf, 5 V-tolerant, FM+ capable). Alt: I2C1_SCL, USART1_TX, TIM16_CH1N, TIM4_CH1, TIM8_CH1, TSC_G5_IO3, TIM8_ETR, TIM8_BKIN2, EVENTOUT."
      },
      {
        "number": "59",
        "name": "PB7",
        "type": "bidirectional",
        "description": "GPIO (FTf). Alt: I2C1_SDA, USART1_RX, TIM3_CH4, TIM4_CH2, TIM17_CH1N, TIM8_BKIN, TSC_G5_IO4, EVENTOUT."
      },
      {
        "number": "60",
        "name": "BOOT0",
        "type": "input",
        "description": "Dedicated boot memory selection input sampled at reset (dedicated 'B' I/O structure)."
      },
      {
        "number": "61",
        "name": "PB8",
        "type": "bidirectional",
        "description": "GPIO (FTf). Alt: I2C1_SCL, CAN_RX, TIM16_CH1, TIM4_CH3, TIM8_CH2, TIM1_BKIN, TSC_SYNC, COMP1_OUT, EVENTOUT."
      },
      {
        "number": "62",
        "name": "PB9",
        "type": "bidirectional",
        "description": "GPIO (FTf). Alt: I2C1_SDA, CAN_TX, TIM17_CH1, TIM4_CH4, TIM8_CH3, IR_OUT, COMP2_OUT, EVENTOUT."
      },
      {
        "number": "63",
        "name": "VSS",
        "type": "power_in",
        "description": "Digital ground."
      },
      {
        "number": "64",
        "name": "VDD",
        "type": "power_in",
        "description": "Digital power supply (2.0-3.6 V)."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://www.st.com/resource/en/datasheet/stm32f303rbt6.pdf",
        "pages": 148,
        "sha256": "e7a65f330e8fc061",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 64,
        "described": 64,
        "cites_pages": true,
        "refuses_to_fabricate": true,
        "checked_against": "STMicroelectronics STM32_open_pin_data (STM32F303R(B-C)Tx.xml, LQFP64)"
      },
      "correction": {
        "at": "2026-10-01",
        "what": "1 of 64 pins corrected",
        "how": "pinout replaced from STMicroelectronics STM32_open_pin_data (STM32F303R(B-C)Tx.xml, LQFP64); the previous pinout came from an earlier extraction",
        "symbol": "regenerated from the corrected pinout"
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "mcu": {
      "part_number": "STM32F303RBT6",
      "series": "STM32F3",
      "subfamily": "STM32F303",
      "core": "Arm Cortex-M4",
      "frequency_mhz": 72,
      "flash_kb": 128,
      "ram_kb": 40,
      "io_count": 52,
      "package": "LQFP 64 10x10x1.4 mm",
      "marketing_status": "Active",
      "fpu": "Single-precision FPU",
      "supply_v_min": 2,
      "supply_v_max": 3.6,
      "temp_min_c": -40,
      "temp_max_c": 85,
      "adc_count": 4,
      "timers": 9,
      "in_distributor_stock": true,
      "product_folder": "/en/microcontrollers-microprocessors/stm32f303rb.html",
      "source": "st.com portfolio grid CL1734"
    }
  },
  "metadata": {
    "specs": {
      "Core": "Arm Cortex-M4",
      "Max clock": "72 MHz",
      "Flash": "128 kB",
      "RAM": "40 kB",
      "I/O pins": 52,
      "ADC units": 4,
      "ST status": "Active",
      "Manufacturer": "STMicroelectronics",
      "Package": "LQFP-64(10x10)",
      "Category": "MCU",
      "Pins": "64"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "stm32f303rbt6"
  ],
  "discovery_pitch": "STM32F303RBT6 (STMicroelectronics) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "stm32f303rbt6.kicad_sym",
    "stm32f303rbt6.kicad_mod",
    "stm32f303rbt6.glb",
    "stm32f303rbt6.step",
    "stm32f303rbt6-etched.step",
    "stm32f303rbt6.lbr",
    "docs/hero.png",
    "docs/stm32f303rbt6-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "visibility": {
    "public": true
  },
  "variants": [
    {
      "mpn": "STM32F303RBT6",
      "kind": "packaging"
    },
    {
      "mpn": "STM32F303RBT6RCT6",
      "kind": "packaging"
    },
    {
      "mpn": "STM32F303RBT6CBT6",
      "kind": "packaging"
    },
    {
      "mpn": "STM32F303RBT6CCT6",
      "kind": "packaging"
    },
    {
      "mpn": "STM32F303RBT6VBT6",
      "kind": "packaging"
    },
    {
      "mpn": "STM32F303RBT6VCT6",
      "kind": "packaging"
    },
    {
      "mpn": "STM32F303RBT6ZBY6",
      "kind": "packaging"
    },
    {
      "mpn": "STM32F303RBT6ZCY6",
      "kind": "packaging"
    }
  ],
  "updated_at": "2026-09-25T08:45:17.076Z"
}