STM32G491CET6

{
  "schema_version": 1,
  "type": "component",
  "slug": "stm32g491cet6",
  "title": "STM32G491CET6",
  "brief": "STMicroelectronics Microcontrollers (MCU/MPU/SOC), LQFP-48(7x7). 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",
    "stm32g491cet6",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "STM32G491CET6",
    "manufacturer": "STMicroelectronics",
    "package": "LQFP-48(7x7)",
    "pin_count": 48,
    "category": "Embedded Processors & Controllers",
    "subcategory": "Microcontrollers (MCU/MPU/SOC)",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590264930139209728",
    "parts": {
      "symbol": "stm32g491cet6.kicad_sym",
      "footprint": "stm32g491cet6.kicad_mod",
      "model_3d": "stm32g491cet6-hero.glb",
      "model_3d_plain": "stm32g491cet6.glb",
      "model_3d_step": "stm32g491cet6-etched.step",
      "model_3d_step_plain": "stm32g491cet6.step",
      "lbr": "stm32g491cet6.lbr"
    },
    "distributor_links": {
      "lcsc": "C3227300",
      "digikey": "497-STM32G491CET6-ND",
      "mouser": "511-STM32G491CET6"
    },
    "distributor_check": {
      "checked_at": "2026-10-08T18:15:18Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "497-STM32G491CET6-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "511-STM32G491CET6",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "VBAT",
        "type": "power_in",
        "description": "Backup-domain supply for the RTC, backup registers and the power switch feeding PC13 to PC15; operating range is 1.55 V to 3.6 V."
      },
      {
        "number": "2",
        "name": "PC13",
        "type": "bidirectional",
        "description": "5 V tolerant GPIO on the power-switch domain, which sinks only 3 mA, so output use is limited to 2 MHz at 30 pF maximum and it must not source current to loads such as LEDs; also WKUP2, RTC_TAMP1, RTC_TS and RTC_OUT1."
      },
      {
        "number": "3",
        "name": "PC14-OSC32_IN",
        "type": "bidirectional",
        "description": "5 V tolerant GPIO on the power-switch domain with the same 3 mA and 2 MHz / 30 pF output limits as PC13, also serving as the 32 kHz oscillator input OSC32_IN."
      },
      {
        "number": "4",
        "name": "PC15-OSC32_OUT",
        "type": "bidirectional",
        "description": "5 V tolerant GPIO on the power-switch domain with the same 3 mA and 2 MHz / 30 pF output limits as PC13, also serving as the 32 kHz oscillator output OSC32_OUT."
      },
      {
        "number": "5",
        "name": "PF0-OSC_IN",
        "type": "bidirectional",
        "description": "5 V tolerant, Fm+ capable I/O with analog switch supplied by VDDA, also serving as the HSE oscillator input OSC_IN and ADC1_IN10, with I2C2_SDA and SPI2_NSS/I2S2_WS alternate functions."
      },
      {
        "number": "6",
        "name": "PF1-OSC_OUT",
        "type": "bidirectional",
        "description": "5 V tolerant I/O with analog switch supplied by VDDA, also serving as the HSE oscillator output OSC_OUT, with ADC2_IN10 and COMP3_INM additional functions."
      },
      {
        "number": "7",
        "name": "PG10-NRST",
        "type": "bidirectional",
        "description": "Bidirectional reset pin with embedded weak pull-up resistor (NRST), also providing the MCO alternate function."
      },
      {
        "number": "8",
        "name": "PA0",
        "type": "bidirectional",
        "description": "3.6 V tolerant I/O with analog switch supplied by VDDA; also ADC12_IN1, WKUP1, RTC_TAMP2 and TIM2_CH1 / USART2_CTS."
      },
      {
        "number": "9",
        "name": "PA1",
        "type": "bidirectional",
        "description": "3.6 V tolerant I/O with analog switch supplied by VDDA; also ADC12_IN2, RTC_REFIN, OPAMP1_VINP and TIM2_CH2 / USART2_RTS_DE."
      },
      {
        "number": "10",
        "name": "PA2",
        "type": "bidirectional",
        "description": "3.6 V tolerant I/O with analog switch supplied by VDDA; also ADC1_IN3, COMP2_OUT, WKUP4/LSCO, TIM2_CH3 and USART2_TX."
      },
      {
        "number": "11",
        "name": "PA3",
        "type": "bidirectional",
        "description": "3.6 V tolerant I/O with analog switch supplied by VDDA; also ADC1_IN4, OPAMP1_VINM/OPAMP1_VINP, TIM2_CH4 and USART2_RX."
      },
      {
        "number": "12",
        "name": "PA4",
        "type": "bidirectional",
        "description": "3.6 V tolerant I/O with analog switch supplied by VDDA; also ADC2_IN17, DAC1_OUT1, COMP1_INM, SPI1_NSS and TIM3_CH2."
      },
      {
        "number": "13",
        "name": "PA5",
        "type": "bidirectional",
        "description": "3.6 V tolerant I/O with analog switch supplied by VDDA; also ADC2_IN13, DAC1_OUT2, COMP2_INM, OPAMP2_VINM, SPI1_SCK and TIM2_CH1."
      },
      {
        "number": "14",
        "name": "PA6",
        "type": "bidirectional",
        "description": "3.6 V tolerant I/O with analog switch supplied by VDDA; also ADC2_IN3, OPAMP2_VOUT, COMP1_OUT, SPI1_MISO and TIM16_CH1."
      },
      {
        "number": "15",
        "name": "PA7",
        "type": "bidirectional",
        "description": "3.6 V tolerant I/O with analog switch supplied by VDDA; also ADC2_IN4, COMP2_INP, OPAMP1_VINP/OPAMP2_VINP, SPI1_MOSI and TIM17_CH1."
      },
      {
        "number": "16",
        "name": "PB0",
        "type": "bidirectional",
        "description": "3.6 V tolerant I/O with analog switch supplied by VDDA; also ADC1_IN15/ADC3_IN12, COMP4_INP, OPAMP2_VINP, OPAMP3_VINP and TIM3_CH3."
      },
      {
        "number": "17",
        "name": "PB1",
        "type": "bidirectional",
        "description": "3.6 V tolerant I/O with analog switch supplied by VDDA; also ADC1_IN12/ADC3_IN1, COMP1_INP, OPAMP3_VOUT, OPAMP6_VINM and TIM3_CH4."
      },
      {
        "number": "18",
        "name": "PB2",
        "type": "bidirectional",
        "description": "3.6 V tolerant I/O with analog switch supplied by VDDA; also ADC2_IN12, COMP4_INM, OPAMP3_VINM, RTC_OUT2 and LPTIM1_OUT."
      },
      {
        "number": "19",
        "name": "VSSA",
        "type": "power_in",
        "description": "Analog ground for the ADC, DAC, OPAMP, COMP and VREFBUF; ground-pin variations must stay within 50 mV of VSS."
      },
      {
        "number": "20",
        "name": "VREF+",
        "type": "power_in",
        "description": "Positive reference voltage input for the ADC and DAC (also VREFBUF_OUT); VREF+ may exceed VDDA by no more than 0.4 V and can be internally connected to VDDA depending on package."
      },
      {
        "number": "21",
        "name": "VDDA",
        "type": "power_in",
        "description": "Analog supply for the ADC, DAC, OPAMP, COMP and VREFBUF; minimum 1.62 V for ADC or COMP, 1.71 V for DAC, 2.0 V for OPAMP and 2.4 V for VREFBUF, maximum 3.6 V."
      },
      {
        "number": "22",
        "name": "PB10",
        "type": "bidirectional",
        "description": "3.6 V tolerant I/O with analog switch supplied by VDDA; also OPAMP3_VINM, TIM2_CH3, USART3_TX, LPUART1_RX and QUADSPI1_CLK."
      },
      {
        "number": "23",
        "name": "VSS",
        "type": "power_in",
        "description": "Ground pin; all VSS pins must be connected to the external ground."
      },
      {
        "number": "24",
        "name": "VDD",
        "type": "power_in",
        "description": "Main digital supply pin; operating voltage range is 1.71 V to 3.6 V."
      },
      {
        "number": "25",
        "name": "PB11",
        "type": "bidirectional",
        "description": "3.6 V tolerant I/O with analog switch supplied by VDDA; also ADC12_IN14, OPAMP6_VOUT, TIM2_CH4, USART3_RX and LPUART1_TX."
      },
      {
        "number": "26",
        "name": "PB12",
        "type": "bidirectional",
        "description": "3.6 V tolerant I/O with analog switch supplied by VDDA; also ADC1_IN11, OPAMP6_VINP, SPI2_NSS/I2S2_WS, USART3_CK and FDCAN2_RX."
      },
      {
        "number": "27",
        "name": "PB13",
        "type": "bidirectional",
        "description": "3.6 V tolerant I/O with analog switch supplied by VDDA; also ADC3_IN5, OPAMP3_VINP, OPAMP6_VINP, SPI2_SCK/I2S2_CK, USART3_CTS and FDCAN2_TX."
      },
      {
        "number": "28",
        "name": "PB14",
        "type": "bidirectional",
        "description": "3.6 V tolerant I/O with analog switch supplied by VDDA; also ADC1_IN5, OPAMP2_VINP, TIM15_CH1, SPI2_MISO and COMP4_OUT."
      },
      {
        "number": "29",
        "name": "PB15",
        "type": "bidirectional",
        "description": "5 V tolerant I/O with analog switch supplied by VDDA; also ADC2_IN15, RTC_REFIN, TIM15_CH2, COMP3_OUT and SPI2_MOSI/I2S2_SD."
      },
      {
        "number": "30",
        "name": "PA8",
        "type": "bidirectional",
        "description": "5 V tolerant, Fm+ capable I/O; also MCO, I2C3_SCL, I2C2_SDA, TIM1_CH1, USART1_CK and SAI1_CK2."
      },
      {
        "number": "31",
        "name": "PA9",
        "type": "bidirectional",
        "description": "5 V tolerant, Fm+ capable I/O with USB Type-C dead-battery function; a high level on this pin activates the internal 5.1 kΩ pull-down on PB6 (UCPD1_CC1) after reset, also USART1_TX, I2C2_SCL and TIM1_CH2."
      },
      {
        "number": "32",
        "name": "PA10",
        "type": "bidirectional",
        "description": "5 V tolerant, Fm+ capable I/O with USB Type-C dead-battery function; a high level on this pin activates the internal 5.1 kΩ pull-down on PB4 (UCPD1_CC2) after reset, also USART1_RX, SPI2_MISO and USB_CRS_SYNC."
      },
      {
        "number": "33",
        "name": "PA11",
        "type": "bidirectional",
        "description": "5 V tolerant I/O with USB function; also USB_DM, USART1_CTS, SPI2_MOSI/I2S2_SD, TIM1_CH1N, COMP1_OUT and FDCAN1_RX."
      },
      {
        "number": "34",
        "name": "PA12",
        "type": "bidirectional",
        "description": "5 V tolerant I/O with USB function; also USB_DP, USART1_RTS_DE, TIM16_CH1, COMP2_OUT and FDCAN1_TX."
      },
      {
        "number": "35",
        "name": "VSS",
        "type": "power_in",
        "description": "Ground pin; all VSS pins must be connected to the external ground."
      },
      {
        "number": "36",
        "name": "VDD",
        "type": "power_in",
        "description": "Main digital supply pin; operating voltage range is 1.71 V to 3.6 V."
      },
      {
        "number": "37",
        "name": "PA13",
        "type": "bidirectional",
        "description": "5 V tolerant, Fm+ capable I/O; after reset it is configured as SWDIO-JTMS with an internal pull-up enabled, also IR_OUT, I2C1_SCL and USART3_CTS."
      },
      {
        "number": "38",
        "name": "PA14",
        "type": "bidirectional",
        "description": "5 V tolerant, Fm+ capable I/O; after reset it is configured as SWCLK-JTCK with an internal pull-down enabled, also I2C1_SDA, LPTIM1_OUT and USART2_TX."
      },
      {
        "number": "39",
        "name": "PA15",
        "type": "bidirectional",
        "description": "5 V tolerant, Fm+ capable I/O; after reset it is configured as JTDI with an internal pull-up enabled, also TIM2_CH1, SPI1_NSS, SPI3_NSS/I2S3_WS and USART2_RX."
      },
      {
        "number": "40",
        "name": "PB3",
        "type": "bidirectional",
        "description": "5 V tolerant I/O; after reset it is configured as JTDO/TRACESWO debug alternate function, also SPI1_SCK, SPI3_SCK/I2S3_CK, USART2_TX and TIM2_CH2."
      },
      {
        "number": "41",
        "name": "PB4",
        "type": "bidirectional",
        "description": "5 V tolerant, USB Type-C CC capable I/O; after reset it is configured as JTRST with an internal pull-up enabled and its UCPD1_CC2 pull-down is enabled unless disabled, also SPI1_MISO, USART2_RX and TIM16_CH1."
      },
      {
        "number": "42",
        "name": "PB5",
        "type": "bidirectional",
        "description": "5 V tolerant, Fm+ capable I/O; also TIM16_BKIN, TIM3_CH2, I2C1_SMBA, SPI1_MOSI, SPI3_MOSI/I2S3_SD, FDCAN2_RX and LPTIM1_IN1."
      },
      {
        "number": "43",
        "name": "PB6",
        "type": "bidirectional",
        "description": "5 V tolerant, USB Type-C CC capable I/O; its UCPD1_CC1 pull-down is controlled by the level on PA9 after reset, also TIM16_CH1N, TIM4_CH1, USART1_TX, COMP4_OUT and FDCAN2_TX."
      },
      {
        "number": "44",
        "name": "PB7",
        "type": "bidirectional",
        "description": "5 V tolerant, Fm+ capable I/O; also PVD_IN, TIM17_CH1N, TIM4_CH2, I2C1_SDA, USART1_RX and COMP3_OUT."
      },
      {
        "number": "45",
        "name": "PB8-BOOT0",
        "type": "bidirectional",
        "description": "5 V tolerant, Fm+ capable I/O that also carries the BOOT0 function; the datasheet recommends setting it to a mode other than analog after startup to limit consumption if left unconnected, also TIM16_CH1, I2C1_SCL and USART3_RX."
      },
      {
        "number": "46",
        "name": "PB9",
        "type": "bidirectional",
        "description": "5 V tolerant, Fm+ capable I/O; also TIM17_CH1, TIM4_CH4, I2C1_SDA, IR_OUT, USART3_TX, COMP2_OUT and FDCAN1_TX."
      },
      {
        "number": "47",
        "name": "VSS",
        "type": "power_in",
        "description": "Ground pin; all VSS pins must be connected to the external ground."
      },
      {
        "number": "48",
        "name": "VDD",
        "type": "power_in",
        "description": "Main digital supply pin; operating voltage range is 1.71 V to 3.6 V."
      }
    ],
    "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: The LQFP48 pinout figure (Figure 7, page 46) text extraction is garbled and does not map cleanly to ; The datasheet gives no per-pin prose for LQFP48. Descriptions were compiled from Table 12 (I/O struc; Pin PB8-BOOT0 is listed as I/O (FT_f) in Table 12 with footnote 6, although the Table 11 legend list"
        ],
        "pages_sent": 80,
        "cost_usd": 0.3642,
        "at": "2026-10-08T18:14:56"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590264930139209728",
        "pages": 199,
        "sha256": "ba71e197157250a1",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 48,
        "described": 48,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "9dea352d93177c2904afd7d7b68ea8855ce1ab691f69f8b3e13655600514b6bf",
        "checked": "2026-10-08",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
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        "sha256": "7afa41a79a1750debec6eff76ef4b7085d711b6578d4b4a844dea1c7eccf0647",
        "checked": "2026-10-08",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "STMicroelectronics",
      "Package": "LQFP-48(7x7)",
      "Category": "Embedded Processors & Controllers",
      "Pins": "48"
    }
  },
  "variants": [],
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  "discovery_pitch": "STM32G491CET6 (STMicroelectronics) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
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