STM32G491RET6

{
  "schema_version": 1,
  "type": "component",
  "slug": "stm32g491ret6",
  "title": "STM32G491RET6",
  "brief": "STMicroelectronics Microcontrollers (MCU/MPU/SOC), LQFP-64(10x10). 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",
    "stm32g491ret6",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "STM32G491RET6",
    "manufacturer": "STMicroelectronics",
    "package": "LQFP-64(10x10)",
    "pin_count": 64,
    "category": "Embedded Processors & Controllers",
    "subcategory": "Microcontrollers (MCU/MPU/SOC)",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590385548037951488",
    "parts": {
      "symbol": "stm32g491ret6.kicad_sym",
      "footprint": "stm32g491ret6.kicad_mod",
      "model_3d": "stm32g491ret6-hero.glb",
      "model_3d_plain": "stm32g491ret6.glb",
      "model_3d_step": "stm32g491ret6-etched.step",
      "model_3d_step_plain": "stm32g491ret6.step",
      "lbr": "stm32g491ret6.lbr"
    },
    "distributor_links": {
      "lcsc": "C3231005",
      "digikey": "497-STM32G491RET6-ND",
      "mouser": "511-STM32G491RET6"
    },
    "distributor_check": {
      "checked_at": "2026-10-05T20:50:32Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "497-STM32G491RET6-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "511-STM32G491RET6",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "VBAT",
        "type": "power_in",
        "description": "Backup supply for RTC and backup registers, operating range 1.55 V to 3.6 V."
      },
      {
        "number": "2",
        "name": "PC13",
        "type": "bidirectional",
        "description": "FT I/O supplied through the power switch (3 mA max sink), so output speed is limited to 2 MHz with 30 pF max load; additional functions WKUP2, RTC_TAMP1, RTC_TS, RTC_OUT1."
      },
      {
        "number": "3",
        "name": "PC14-OSC32_IN",
        "type": "bidirectional",
        "description": "FT I/O supplied through the power switch with limited output (2 MHz, 30 pF max); additional function OSC32_IN for the 32.768 kHz LSE crystal."
      },
      {
        "number": "4",
        "name": "PC15-OSC32_OUT",
        "type": "bidirectional",
        "description": "FT I/O supplied through the power switch with limited output (2 MHz, 30 pF max); additional function OSC32_OUT for the 32.768 kHz LSE crystal."
      },
      {
        "number": "5",
        "name": "PF0-OSC_IN",
        "type": "bidirectional",
        "description": "FT_fa I/O with I2C2_SDA, SPI2_NSS/I2S2_WS and TIM1_CH3N alternate functions; additional functions ADC1_IN10 and OSC_IN (HSE crystal input)."
      },
      {
        "number": "6",
        "name": "PF1-OSC_OUT",
        "type": "bidirectional",
        "description": "FT_a I/O with SPI2_SCK/I2S2_CK alternate function; additional functions ADC2_IN10, COMP3_INM and OSC_OUT (HSE crystal output)."
      },
      {
        "number": "7",
        "name": "PG10-NRST",
        "type": "bidirectional",
        "description": "Bidirectional reset pin with embedded weak pull-up resistor (NRST); also usable as PG10 with MCO alternate function."
      },
      {
        "number": "8",
        "name": "PC0",
        "type": "bidirectional",
        "description": "FT_a I/O with LPTIM1_IN1, TIM1_CH1 and LPUART1_RX alternate functions; additional functions ADC12_IN6 and COMP3_INM."
      },
      {
        "number": "9",
        "name": "PC1",
        "type": "bidirectional",
        "description": "TT_a I/O with LPTIM1_OUT, TIM1_CH2, LPUART1_TX, QUADSPI1_BK2_IO0 and SAI1_SD_A alternate functions; additional functions ADC12_IN7 and COMP3_INP."
      },
      {
        "number": "10",
        "name": "PC2",
        "type": "bidirectional",
        "description": "FT_a I/O with LPTIM1_IN2, TIM1_CH3, COMP3_OUT, TIM20_CH2 and QUADSPI1_BK2_IO1 alternate functions; additional function ADC12_IN8."
      },
      {
        "number": "11",
        "name": "PC3",
        "type": "bidirectional",
        "description": "FT_a I/O with LPTIM1_ETR, TIM1_CH4, SAI1_D1, TIM1_BKIN2, QUADSPI1_BK2_IO2 and SAI1_SD_A alternate functions; additional function ADC12_IN9."
      },
      {
        "number": "12",
        "name": "PA0",
        "type": "bidirectional",
        "description": "TT_a I/O with TIM2_CH1, USART2_CTS, COMP1_OUT, TIM8_BKIN and TIM8_ETR alternate functions; additional functions ADC12_IN1, COMP1_INM, COMP3_INP, RTC_TAMP2 and WKUP1."
      },
      {
        "number": "13",
        "name": "PA1",
        "type": "bidirectional",
        "description": "TT_a I/O with RTC_REFIN, TIM2_CH2, USART2_RTS_DE and TIM15_CH1N alternate functions; additional functions ADC12_IN2, COMP1_INP and OPAMP1_VINP/OPAMP3_VINP/OPAMP6_VINM."
      },
      {
        "number": "14",
        "name": "PA2",
        "type": "bidirectional",
        "description": "TT_a I/O with TIM2_CH3, USART2_TX, COMP2_OUT, TIM15_CH1, QUADSPI1_BK1_NCS, LPUART1_TX and UCPD1_FRSTX alternate functions; additional functions ADC1_IN3, COMP2_INM, OPAMP1_VOUT and WKUP4/LSCO."
      },
      {
        "number": "15",
        "name": "VSS",
        "type": "power_in",
        "description": "Digital ground supply pin; must be connected to the external ground."
      },
      {
        "number": "16",
        "name": "VDD",
        "type": "power_in",
        "description": "Digital supply pin, 1.71 V to 3.6 V operating range, to be decoupled with ceramic capacitors."
      },
      {
        "number": "17",
        "name": "PA3",
        "type": "bidirectional",
        "description": "TT_a I/O with TIM2_CH4, SAI1_CK1, USART2_RX, TIM15_CH2, QUADSPI1_CLK, LPUART1_RX and SAI1_MCLK_A alternate functions; additional functions ADC1_IN4, COMP2_INP and OPAMP1_VINM/OPAMP1_VINP."
      },
      {
        "number": "18",
        "name": "PA4",
        "type": "bidirectional",
        "description": "TT_a I/O with TIM3_CH2, SPI1_NSS, SPI3_NSS/I2S3_WS, USART2_CK and SAI1_FS_B alternate functions; additional functions ADC2_IN17, DAC1_OUT1 and COMP1_INM."
      },
      {
        "number": "19",
        "name": "PA5",
        "type": "bidirectional",
        "description": "TT_a I/O with TIM2_CH1, TIM2_ETR, SPI1_SCK and UCPD1_FRSTX alternate functions; additional functions ADC2_IN13, DAC1_OUT2, COMP2_INM and OPAMP2_VINM."
      },
      {
        "number": "20",
        "name": "PA6",
        "type": "bidirectional",
        "description": "TT_a I/O with TIM16_CH1, TIM3_CH1, TIM8_BKIN, SPI1_MISO, TIM1_BKIN, COMP1_OUT, QUADSPI1_BK1_IO3 and LPUART1_CTS alternate functions; additional functions ADC2_IN3 and OPAMP2_VOUT."
      },
      {
        "number": "21",
        "name": "PA7",
        "type": "bidirectional",
        "description": "TT_a I/O with TIM17_CH1, TIM3_CH2, TIM8_CH1N, SPI1_MOSI, TIM1_CH1N, COMP2_OUT, QUADSPI1_BK1_IO2 and UCPD1_FRSTX alternate functions; additional functions ADC2_IN4, COMP2_INP, OPAMP1_VINP and OPAMP2_VINP."
      },
      {
        "number": "22",
        "name": "PC4",
        "type": "bidirectional",
        "description": "FT_fa I/O with TIM1_ETR, I2C2_SCL, USART1_TX and QUADSPI1_BK2_IO3 alternate functions; additional function ADC2_IN5."
      },
      {
        "number": "23",
        "name": "PC5",
        "type": "bidirectional",
        "description": "TT_a I/O with TIM15_BKIN, SAI1_D3, TIM1_CH4N and USART1_RX alternate functions; additional functions ADC2_IN11, OPAMP1_VINM, OPAMP2_VINM and WKUP5."
      },
      {
        "number": "24",
        "name": "PB0",
        "type": "bidirectional",
        "description": "TT_a I/O with TIM3_CH3, TIM8_CH2N, TIM1_CH2N, QUADSPI1_BK1_IO1 and UCPD1_FRSTX alternate functions; additional functions ADC1_IN15/ADC3_IN12, COMP4_INP, OPAMP2_VINP and OPAMP3_VINP."
      },
      {
        "number": "25",
        "name": "PB1",
        "type": "bidirectional",
        "description": "TT_a I/O with TIM3_CH4, TIM8_CH3N, TIM1_CH3N, COMP4_OUT, QUADSPI1_BK1_IO0 and LPUART1_RTS_DE alternate functions; additional functions ADC1_IN12/ADC3_IN1, COMP1_INP, OPAMP3_VOUT and OPAMP6_VINM."
      },
      {
        "number": "26",
        "name": "PB2",
        "type": "bidirectional",
        "description": "TT_a I/O with RTC_OUT2, LPTIM1_OUT, TIM20_CH1, I2C3_SMBA and QUADSPI1_BK2_IO1 alternate functions; additional functions ADC2_IN12, COMP4_INM and OPAMP3_VINM."
      },
      {
        "number": "27",
        "name": "VSSA",
        "type": "power_in",
        "description": "Analog ground supply pin for the analog domain (ADC, DAC, OPAMP, COMP, VREFBUF)."
      },
      {
        "number": "28",
        "name": "VREF+",
        "type": "power_in",
        "description": "Voltage reference pin; additional function VREFBUF_OUT (internal reference buffer output); VREF+ must not exceed VDDA by more than 0.4 V."
      },
      {
        "number": "29",
        "name": "VDDA",
        "type": "power_in",
        "description": "Analog supply pin, 1.62 V to 3.6 V when ADC or COMP is used (2.0 V min with OPAMP, 2.4 V min with VREFBUF)."
      },
      {
        "number": "30",
        "name": "PB10",
        "type": "bidirectional",
        "description": "TT_a I/O with TIM2_CH3, USART3_TX, LPUART1_RX, QUADSPI1_CLK, TIM1_BKIN and SAI1_SCK_A alternate functions; additional function OPAMP3_VINM."
      },
      {
        "number": "31",
        "name": "VSS",
        "type": "power_in",
        "description": "Digital ground supply pin; must be connected to the external ground."
      },
      {
        "number": "32",
        "name": "VDD",
        "type": "power_in",
        "description": "Digital supply pin, 1.71 V to 3.6 V operating range, to be decoupled with ceramic capacitors."
      },
      {
        "number": "33",
        "name": "PB11",
        "type": "bidirectional",
        "description": "TT_a I/O with TIM2_CH4, USART3_RX, LPUART1_TX and QUADSPI1_BK1_NCS alternate functions; additional functions ADC12_IN14 and OPAMP6_VOUT."
      },
      {
        "number": "34",
        "name": "PB12",
        "type": "bidirectional",
        "description": "TT_a I/O with I2C2_SMBA, SPI2_NSS/I2S2_WS, TIM1_BKIN, USART3_CK, LPUART1_RTS_DE and FDCAN2_RX alternate functions; additional functions ADC1_IN11 and OPAMP6_VINP."
      },
      {
        "number": "35",
        "name": "PB13",
        "type": "bidirectional",
        "description": "TT_a I/O with SPI2_SCK/I2S2_CK, TIM1_CH1N, USART3_CTS, LPUART1_CTS and FDCAN2_TX alternate functions; additional functions ADC3_IN5, OPAMP3_VINP and OPAMP6_VINP."
      },
      {
        "number": "36",
        "name": "PB14",
        "type": "bidirectional",
        "description": "TT_a I/O with TIM15_CH1, SPI2_MISO, TIM1_CH2N, USART3_RTS_DE and COMP4_OUT alternate functions; additional functions ADC1_IN5 and OPAMP2_VINP."
      },
      {
        "number": "37",
        "name": "PB15",
        "type": "bidirectional",
        "description": "FT_a I/O with RTC_REFIN, TIM15_CH2, TIM15_CH1N, COMP3_OUT, TIM1_CH3N and SPI2_MOSI/I2S2_SD alternate functions; additional function ADC2_IN15."
      },
      {
        "number": "38",
        "name": "PC6",
        "type": "bidirectional",
        "description": "FT I/O with TIM3_CH1, TIM8_CH1 and I2S2_MCK alternate functions."
      },
      {
        "number": "39",
        "name": "PC7",
        "type": "bidirectional",
        "description": "FT I/O with TIM3_CH2, TIM8_CH2 and I2S3_MCK alternate functions."
      },
      {
        "number": "40",
        "name": "PC8",
        "type": "bidirectional",
        "description": "FT_f I/O (Fm+ capable) with TIM3_CH3, TIM8_CH3, TIM20_CH3 and I2C3_SCL alternate functions."
      },
      {
        "number": "41",
        "name": "PC9",
        "type": "bidirectional",
        "description": "FT_f I/O (Fm+ capable) with TIM3_CH4, TIM8_CH4, I2SCKIN, TIM8_BKIN2 and I2C3_SDA alternate functions."
      },
      {
        "number": "42",
        "name": "PA8",
        "type": "bidirectional",
        "description": "FT_f I/O with MCO, I2C3_SCL, I2C2_SDA, I2S2_MCK, TIM1_CH1, USART1_CK, TIM4_ETR, SAI1_CK2 and SAI1_SCK_A alternate functions."
      },
      {
        "number": "43",
        "name": "PA9",
        "type": "bidirectional",
        "description": "FT_fd I/O with I2C3_SMBA, I2C2_SCL, I2S3_MCK, TIM1_CH2, USART1_TX, TIM15_BKIN, TIM2_CH3 and SAI1_FS_A alternate functions; additional function UCPD1_DBCC1 (dead battery control)."
      },
      {
        "number": "44",
        "name": "PA10",
        "type": "bidirectional",
        "description": "FT_da I/O with TIM17_BKIN, USB_CRS_SYNC, I2C2_SMBA, SPI2_MISO, TIM1_CH3, USART1_RX, TIM2_CH4, TIM8_BKIN, SAI1_D1 and SAI1_SD_A alternate functions; additional function UCPD1_DBCC2 (dead battery control)."
      },
      {
        "number": "45",
        "name": "PA11",
        "type": "bidirectional",
        "description": "FT_u I/O with SPI2_MOSI/I2S2_SD, TIM1_CH1N, USART1_CTS, COMP1_OUT, FDCAN1_RX, TIM4_CH1, TIM1_CH4 and TIM1_BKIN2 alternate functions; additional function USB_DM."
      },
      {
        "number": "46",
        "name": "PA12",
        "type": "bidirectional",
        "description": "FT_u I/O with TIM16_CH1, I2SCKIN, TIM1_CH2N, USART1_RTS_DE, COMP2_OUT, FDCAN1_TX, TIM4_CH2 and TIM1_ETR alternate functions; additional function USB_DP."
      },
      {
        "number": "47",
        "name": "VSS",
        "type": "power_in",
        "description": "Digital ground supply pin; must be connected to the external ground."
      },
      {
        "number": "48",
        "name": "VDD",
        "type": "power_in",
        "description": "Digital supply pin, 1.71 V to 3.6 V operating range, to be decoupled with ceramic capacitors."
      },
      {
        "number": "49",
        "name": "PA13",
        "type": "bidirectional",
        "description": "FT_f I/O that is SWDIO-JTMS after reset (internal pull-up active), with TIM16_CH1N, I2C1_SCL, IR_OUT, USART3_CTS, TIM4_CH3 and SAI1_SD_B alternate functions."
      },
      {
        "number": "50",
        "name": "PA14",
        "type": "bidirectional",
        "description": "FT_f I/O that is SWCLK-JTCK after reset (internal pull-down active), with LPTIM1_OUT, I2C1_SDA, TIM8_CH2, TIM1_BKIN, USART2_TX and SAI1_FS_B alternate functions."
      },
      {
        "number": "51",
        "name": "PA15",
        "type": "bidirectional",
        "description": "FT_f I/O that is JTDI after reset (internal pull-up active), with TIM2_CH1, TIM8_CH1, TIM20_ETR, I2C1_SCL, SPI1_NSS, SPI3_NSS/I2S3_WS, USART2_RX, UART4_RTS_DE and TIM1_BKIN alternate functions."
      },
      {
        "number": "52",
        "name": "PC10",
        "type": "bidirectional",
        "description": "FT I/O with TIM8_CH1N, UART4_TX, SPI3_SCK/I2S3_CK and USART3_TX alternate functions."
      },
      {
        "number": "53",
        "name": "PC11",
        "type": "bidirectional",
        "description": "FT_f I/O with TIM8_CH2N, UART4_RX, SPI3_MISO, USART3_RX and I2C3_SDA alternate functions."
      },
      {
        "number": "54",
        "name": "PC12",
        "type": "bidirectional",
        "description": "FT I/O with TIM8_CH3N, UART5_TX, SPI3_MOSI/I2S3_SD, USART3_CK and UCPD1_FRSTX alternate functions."
      },
      {
        "number": "55",
        "name": "PD2",
        "type": "bidirectional",
        "description": "FT I/O with TIM3_ETR, TIM8_BKIN and UART5_RX alternate functions."
      },
      {
        "number": "56",
        "name": "PB3",
        "type": "bidirectional",
        "description": "FT I/O that is JTDO/TRACESWO after reset, with TIM2_CH2, TIM4_ETR, USB_CRS_SYNC, TIM8_CH1N, SPI1_SCK, SPI3_SCK/I2S3_CK, USART2_TX, TIM3_ETR and SAI1_SCK_B alternate functions."
      },
      {
        "number": "57",
        "name": "PB4",
        "type": "bidirectional",
        "description": "FT_c I/O that is JTRST after reset (internal pull-up active), with TIM16_CH1, TIM3_CH1, SPI1_MISO, SPI3_MISO, USART2_RX, UART5_RTS_DE and SAI1_MCLK_B alternate functions; additional function UCPD1_CC2 with 5.1 kΩ dead-battery pull-down."
      },
      {
        "number": "58",
        "name": "PB5",
        "type": "bidirectional",
        "description": "FT_f I/O with TIM16_BKIN, TIM3_CH2, TIM8_CH3N, I2C1_SMBA, SPI1_MOSI, SPI3_MOSI/I2S3_SD, USART2_CK, I2C3_SDA, FDCAN2_RX, TIM17_CH1, LPTIM1_IN1, SAI1_SD_B and UART5_CTS alternate functions."
      },
      {
        "number": "59",
        "name": "PB6",
        "type": "bidirectional",
        "description": "FT_c I/O with TIM16_CH1N, TIM4_CH1, TIM8_CH1, TIM8_ETR, USART1_TX, COMP4_OUT, FDCAN2_TX, TIM8_BKIN2, LPTIM1_ETR and SAI1_FS_B alternate functions; additional function UCPD1_CC1 with 5.1 kΩ dead-battery pull-down."
      },
      {
        "number": "60",
        "name": "PB7",
        "type": "bidirectional",
        "description": "FT_f I/O with TIM17_CH1N, TIM4_CH2, I2C1_SDA, TIM8_BKIN, USART1_RX, COMP3_OUT, TIM3_CH4, LPTIM1_IN2 and UART4_CTS alternate functions; additional function PVD_IN."
      },
      {
        "number": "61",
        "name": "PB8-BOOT0",
        "type": "bidirectional",
        "description": "FT_f I/O that doubles as the BOOT0 pin, with TIM16_CH1, TIM4_CH3, SAI1_CK1, I2C1_SCL, USART3_RX, COMP1_OUT, FDCAN1_RX, TIM8_CH2, TIM1_BKIN and SAI1_MCLK_A alternate functions; set to a mode other than analog after startup to limit consumption if left unconnected."
      },
      {
        "number": "62",
        "name": "PB9",
        "type": "bidirectional",
        "description": "FT_f I/O with TIM17_CH1, TIM4_CH4, SAI1_D2, I2C1_SDA, IR_OUT, USART3_TX, COMP2_OUT, FDCAN1_TX, TIM8_CH3, TIM1_CH3N and SAI1_FS_A alternate functions."
      },
      {
        "number": "63",
        "name": "VSS",
        "type": "power_in",
        "description": "Digital ground supply pin; must be connected to the external ground."
      },
      {
        "number": "64",
        "name": "VDD",
        "type": "power_in",
        "description": "Digital supply pin, 1.71 V to 3.6 V operating range, to be decoupled with ceramic capacitors."
      }
    ],
    "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 2 designation not clearly stated in Figure 9 on page 47 - datasheet text shows jump from pin 1 (",
          "1/64 pins cited to the wrong page (name found elsewhere): ['2:NC@p47']"
        ],
        "pages_sent": 80,
        "cost_usd": 0.5777,
        "at": "2026-10-05T20:50:08"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590385548037951488",
        "pages": 199,
        "sha256": "ba71e197157250a1",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 64,
        "described": 64,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    }
  },
  "metadata": {
    "specs": {
      "Manufacturer": "STMicroelectronics",
      "Package": "LQFP-64(10x10)",
      "Category": "Embedded Processors & Controllers",
      "Pins": "64"
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "stm32g491ret6"
  ],
  "discovery_pitch": "STM32G491RET6 (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": [
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    "stm32g491ret6.kicad_mod",
    "stm32g491ret6.glb",
    "stm32g491ret6.step",
    "stm32g491ret6.lbr",
    "docs/hero.png",
    "docs/stm32g491ret6-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
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    "stm32g491ret6-hero.overlay.json"
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  "visibility": {
    "public": true
  }
}