ESP32-S3FN8

{
  "schema_version": 1,
  "type": "component",
  "slug": "esp32-s3fn8",
  "title": "ESP32-S3FN8",
  "brief": "Espressif Systems Microcontrollers (MCU/MPU/SOC), QFN-56-EP(7x7). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "embedded processors & controllers",
    "esp32-s3fn8",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "ESP32-S3FN8",
    "manufacturer": "Espressif Systems",
    "package": "QFN-56-EP(7x7)",
    "pin_count": 57,
    "category": "Embedded Processors & Controllers",
    "subcategory": "Microcontrollers (MCU/MPU/SOC)",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588941122190389248",
    "parts": {
      "symbol": "esp32-s3fn8.kicad_sym",
      "footprint": "esp32-s3fn8.kicad_mod",
      "model_3d": "esp32-s3fn8-hero.glb",
      "model_3d_plain": "esp32-s3fn8.glb",
      "model_3d_step": "esp32-s3fn8-etched.step",
      "model_3d_step_plain": "esp32-s3fn8.step",
      "lbr": "esp32-s3fn8.lbr"
    },
    "distributor_links": {
      "lcsc": "C2913196",
      "digikey": "1965-ESP32-S3FN8TR-ND",
      "mouser": "356-ESP32-S3FN8"
    },
    "distributor_check": {
      "checked_at": "2026-10-10T00:06:12Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "1965-ESP32-S3FN8TR-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "356-ESP32-S3FN8",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "LNA_IN",
        "type": "bidirectional",
        "description": "RF low-noise amplifier input/output for the 2.4 GHz receiver, an analog RF port rather than a digital GPIO."
      },
      {
        "number": "2",
        "name": "VDD3P3",
        "type": "power_in",
        "description": "Analog power supply (analog domain), recommended 3.0-3.6 V with 3.3 V typical."
      },
      {
        "number": "3",
        "name": "VDD3P3",
        "type": "power_in",
        "description": "Analog power supply (analog domain), recommended 3.0-3.6 V with 3.3 V typical."
      },
      {
        "number": "4",
        "name": "CHIP_PU",
        "type": "input",
        "description": "Chip enable: high activates the chip, low powers it down, and the pin must not be left floating."
      },
      {
        "number": "5",
        "name": "GPIO0",
        "type": "bidirectional",
        "description": "General-purpose I/O on the VDD3P3_RTC domain with weak pull-up at reset; strapping pin that, together with GPIO46, selects the boot mode (GPIO0 high for SPI Boot, low with GPIO46 low for Joint Download Boot)."
      },
      {
        "number": "6",
        "name": "GPIO1",
        "type": "bidirectional",
        "description": "General-purpose I/O on the VDD3P3_RTC domain also providing RTC_GPIO1, TOUCH1 and ADC1_CH0 functions; has a ~60 µs low glitch at power-on."
      },
      {
        "number": "7",
        "name": "GPIO2",
        "type": "bidirectional",
        "description": "General-purpose I/O on the VDD3P3_RTC domain also providing RTC_GPIO2, TOUCH2 and ADC1_CH1 functions; has a ~60 µs low glitch at power-on."
      },
      {
        "number": "8",
        "name": "GPIO3",
        "type": "bidirectional",
        "description": "General-purpose I/O on the VDD3P3_RTC domain also providing RTC_GPIO3, TOUCH3 and ADC1_CH2 functions; it is the JTAG-source strapping pin and has no internal pull resistors, so it must be driven by an external circuit that is not high-impedance."
      },
      {
        "number": "9",
        "name": "GPIO4",
        "type": "bidirectional",
        "description": "General-purpose I/O on the VDD3P3_RTC domain also providing RTC_GPIO4, TOUCH4 and ADC1_CH3 functions."
      },
      {
        "number": "10",
        "name": "GPIO5",
        "type": "bidirectional",
        "description": "General-purpose I/O on the VDD3P3_RTC domain also providing RTC_GPIO5, TOUCH5 and ADC1_CH4 functions."
      },
      {
        "number": "11",
        "name": "GPIO6",
        "type": "bidirectional",
        "description": "General-purpose I/O on the VDD3P3_RTC domain also providing RTC_GPIO6, TOUCH6 and ADC1_CH5 functions."
      },
      {
        "number": "12",
        "name": "GPIO7",
        "type": "bidirectional",
        "description": "General-purpose I/O on the VDD3P3_RTC domain also providing RTC_GPIO7, TOUCH7 and ADC1_CH6 functions."
      },
      {
        "number": "13",
        "name": "GPIO8",
        "type": "bidirectional",
        "description": "General-purpose I/O on the VDD3P3_RTC domain also providing RTC_GPIO8, TOUCH8 and ADC1_CH7 functions, and SUBSPICS1 on IO MUX F4."
      },
      {
        "number": "14",
        "name": "GPIO9",
        "type": "bidirectional",
        "description": "General-purpose I/O on the VDD3P3_RTC domain with input enable, also providing RTC_GPIO9, TOUCH9 and ADC1_CH8 functions."
      },
      {
        "number": "15",
        "name": "GPIO10",
        "type": "bidirectional",
        "description": "General-purpose I/O on the VDD3P3_RTC domain with input enable, also providing RTC_GPIO10, TOUCH10 and ADC1_CH9 functions."
      },
      {
        "number": "16",
        "name": "GPIO11",
        "type": "bidirectional",
        "description": "General-purpose I/O on the VDD3P3_RTC domain with input enable, also providing RTC_GPIO11, TOUCH11 and ADC2_CH0 functions."
      },
      {
        "number": "17",
        "name": "GPIO12",
        "type": "bidirectional",
        "description": "General-purpose I/O on the VDD3P3_RTC domain with input enable, also providing RTC_GPIO12, TOUCH12 and ADC2_CH1 functions."
      },
      {
        "number": "18",
        "name": "GPIO13",
        "type": "bidirectional",
        "description": "General-purpose I/O on the VDD3P3_RTC domain with input enable, also providing RTC_GPIO13, TOUCH13 and ADC2_CH2 functions."
      },
      {
        "number": "19",
        "name": "GPIO14",
        "type": "bidirectional",
        "description": "General-purpose I/O on the VDD3P3_RTC domain with input enable, also providing RTC_GPIO14, TOUCH14 and ADC2_CH3 functions."
      },
      {
        "number": "20",
        "name": "VDD3P3_RTC",
        "type": "power_in",
        "description": "Supply for the RTC and part of the digital domain (RTC IOs), recommended 3.0-3.6 V."
      },
      {
        "number": "21",
        "name": "XTAL_32K_P",
        "type": "bidirectional",
        "description": "Positive terminal of the external 32 kHz crystal (or 32 kHz clock input) on the VDD3P3_RTC domain, also usable as GPIO15/RTC_GPIO15 and ADC2_CH4."
      },
      {
        "number": "22",
        "name": "XTAL_32K_N",
        "type": "bidirectional",
        "description": "Negative terminal of the external 32 kHz crystal (or 32 kHz clock input) on the VDD3P3_RTC domain, also usable as GPIO16/RTC_GPIO16 and ADC2_CH5."
      },
      {
        "number": "23",
        "name": "GPIO17",
        "type": "bidirectional",
        "description": "General-purpose I/O on the VDD3P3_RTC domain with input enable, also providing RTC_GPIO17, ADC2_CH6 and U1TXD; default drive current 10 mA."
      },
      {
        "number": "24",
        "name": "GPIO18",
        "type": "bidirectional",
        "description": "General-purpose I/O on the VDD3P3_RTC domain with input enable, also providing RTC_GPIO18, ADC2_CH7, U1RXD and CLK_OUT3; default drive current 10 mA."
      },
      {
        "number": "25",
        "name": "GPIO19",
        "type": "bidirectional",
        "description": "General-purpose I/O on the VDD3P3_RTC domain also used as USB_D- by default; default drive current 40 mA and it emits two ~60 µs high glitches at power-on."
      },
      {
        "number": "26",
        "name": "GPIO20",
        "type": "bidirectional",
        "description": "General-purpose I/O on the VDD3P3_RTC domain also used as USB_D+ with USB pull-up control by default; default drive current 40 mA and it emits high glitches at power-on."
      },
      {
        "number": "27",
        "name": "GPIO21",
        "type": "bidirectional",
        "description": "General-purpose I/O on the VDD3P3_RTC domain with RTC_GPIO21 function and no analog function."
      },
      {
        "number": "28",
        "name": "SPICS1",
        "type": "bidirectional",
        "description": "SPI chip-select 1 (CS1) for in-package PSRAM on the VDD_SPI domain, usable as GPIO26 via IO MUX; the datasheet advises against using flash/PSRAM pins for other purposes."
      },
      {
        "number": "29",
        "name": "VDD_SPI",
        "type": "power_in",
        "description": "Power pin for the SPI flash/PSRAM IO domain, which the datasheet lists as 3.3 V for ESP32-S3FN8; it can also act as a regulator output when driving external 1.8 V flash."
      },
      {
        "number": "30",
        "name": "SPIHD",
        "type": "bidirectional",
        "description": "Hold signal (HOLD# / SIO3) for in-package Quad SPI flash on the VDD_SPI domain; not recommended for other uses."
      },
      {
        "number": "31",
        "name": "SPIWP",
        "type": "bidirectional",
        "description": "Write-protect signal (WP# / SIO2) for in-package Quad SPI flash on the VDD_SPI domain; not recommended for other uses."
      },
      {
        "number": "32",
        "name": "SPICS0",
        "type": "bidirectional",
        "description": "Chip-select 0 (CS#) for in-package flash on the VDD_SPI domain; not recommended for other uses."
      },
      {
        "number": "33",
        "name": "SPICLK",
        "type": "bidirectional",
        "description": "Clock output to in-package flash (CLK) on the VDD_SPI domain; not recommended for other uses."
      },
      {
        "number": "34",
        "name": "SPIQ",
        "type": "bidirectional",
        "description": "Data output (DO / SIO1) for in-package Quad SPI flash on the VDD_SPI domain; not recommended for other uses."
      },
      {
        "number": "35",
        "name": "SPID",
        "type": "bidirectional",
        "description": "Data input (DI / SIO0) for in-package Quad SPI flash on the VDD_SPI domain; not recommended for other uses."
      },
      {
        "number": "36",
        "name": "SPICLK_N",
        "type": "bidirectional",
        "description": "Negative differential SPI clock used in octal SPI modes, powered from VDD_SPI or VDD3P3_CPU per eFuse; alternatively GPIO48."
      },
      {
        "number": "37",
        "name": "SPICLK_P",
        "type": "bidirectional",
        "description": "Positive differential SPI clock used in octal SPI modes, powered from VDD_SPI or VDD3P3_CPU per eFuse; alternatively GPIO47."
      },
      {
        "number": "38",
        "name": "GPIO33",
        "type": "bidirectional",
        "description": "General-purpose I/O on the VDD_SPI / VDD3P3_CPU domain with input enable; used as DQ4 only in octal flash/PSRAM mode."
      },
      {
        "number": "39",
        "name": "GPIO34",
        "type": "bidirectional",
        "description": "General-purpose I/O on the VDD_SPI / VDD3P3_CPU domain with input enable; used as DQ5 only in octal flash/PSRAM mode."
      },
      {
        "number": "40",
        "name": "GPIO35",
        "type": "bidirectional",
        "description": "General-purpose I/O on the VDD_SPI / VDD3P3_CPU domain with input enable; used as DQ6 only in octal flash/PSRAM mode."
      },
      {
        "number": "41",
        "name": "GPIO36",
        "type": "bidirectional",
        "description": "General-purpose I/O on the VDD_SPI / VDD3P3_CPU domain with input enable; used as DQ7 only in octal flash/PSRAM mode."
      },
      {
        "number": "42",
        "name": "GPIO37",
        "type": "bidirectional",
        "description": "General-purpose I/O on the VDD_SPI / VDD3P3_CPU domain with input enable; used as DQS/DM only in octal flash/PSRAM mode."
      },
      {
        "number": "43",
        "name": "GPIO38",
        "type": "bidirectional",
        "description": "General-purpose I/O on the VDD3P3_CPU domain with input enable; also FSPIWP and SUBSPIWP function, and VMO when an external USB PHY is used."
      },
      {
        "number": "44",
        "name": "MTCK",
        "type": "bidirectional",
        "description": "JTAG test clock on the VDD3P3_CPU domain, also usable as GPIO39 and CLK_OUT3."
      },
      {
        "number": "45",
        "name": "MTDO",
        "type": "bidirectional",
        "description": "JTAG test data output on the VDD3P3_CPU domain, also usable as GPIO40 and CLK_OUT2."
      },
      {
        "number": "46",
        "name": "VDD3P3_CPU",
        "type": "power_in",
        "description": "Supply for the digital CPU IO domain, recommended 3.0-3.6 V."
      },
      {
        "number": "47",
        "name": "MTDI",
        "type": "bidirectional",
        "description": "JTAG test data input on the VDD3P3_CPU domain, also usable as GPIO41 and CLK_OUT1."
      },
      {
        "number": "48",
        "name": "MTMS",
        "type": "bidirectional",
        "description": "JTAG test mode select on the VDD3P3_CPU domain, also usable as GPIO42."
      },
      {
        "number": "49",
        "name": "U0TXD",
        "type": "bidirectional",
        "description": "UART0 transmit on the VDD3P3_CPU domain, with weak pull-up at reset and also usable as GPIO43."
      },
      {
        "number": "50",
        "name": "U0RXD",
        "type": "bidirectional",
        "description": "UART0 receive on the VDD3P3_CPU domain, with weak pull-up at reset and also usable as GPIO44."
      },
      {
        "number": "51",
        "name": "GPIO45",
        "type": "bidirectional",
        "description": "Strapping pin with weak pull-down at reset that selects the VDD_SPI voltage, on the VDD3P3_CPU domain."
      },
      {
        "number": "52",
        "name": "GPIO46",
        "type": "bidirectional",
        "description": "Strapping pin with weak pull-down at reset that, with GPIO0, selects the boot mode and controls ROM log printing, on the VDD3P3_CPU domain."
      },
      {
        "number": "53",
        "name": "XTAL_N",
        "type": "passive",
        "description": "Negative terminal of the external crystal (active or passive) or external clock input/output for the main oscillator."
      },
      {
        "number": "54",
        "name": "XTAL_P",
        "type": "passive",
        "description": "Positive terminal of the external crystal (active or passive) or external clock input/output for the main oscillator."
      },
      {
        "number": "55",
        "name": "VDDA",
        "type": "power_in",
        "description": "Analog power supply (analog domain), recommended 3.0-3.6 V."
      },
      {
        "number": "56",
        "name": "VDDA",
        "type": "power_in",
        "description": "Analog power supply (analog domain), recommended 3.0-3.6 V."
      },
      {
        "number": "57",
        "name": "GND",
        "type": "power_in",
        "description": "External ground; the datasheet lists this as the ground pin of the package."
      }
    ],
    "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: Package-level pinout. The datasheet's pin table covers the QFN56 (7x7 mm) package shared by all ESP3; Pin 28 (SPICS1) is documented as the chip-select for in-package PSRAM. The ESP32-S3FN8 has no in-pac; Pin 29 (VDD_SPI) is listed as an input in Table 2-10 and as a regulator output when driving external",
          "2/57 pins cited to the wrong page (name found elsewhere): ['51:GPIO45@p29', '52:GPIO46@p29']"
        ],
        "pages_sent": 65,
        "cost_usd": 0.3149,
        "at": "2026-10-10T00:04:02"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588941122190389248",
        "pages": 79,
        "sha256": "97b4b3199f87c43f",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 57,
        "described": 57,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "esp32-s3fn8.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          7,
          7,
          0.885
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "b42d9b0c7a8d55564f4e9bb74be3ab877d958a268411c07a496787496cfb1b99",
        "checked": "2026-10-10",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "esp32-s3fn8-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          7,
          7,
          0.885
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "78fb2a4cc50619d4fc20963beb9d924aa7839c96ffd3a3ff8a0bae5186ddd820",
        "checked": "2026-10-10",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Espressif Systems",
      "Package": "QFN-56-EP(7x7)",
      "Category": "Embedded Processors & Controllers",
      "Pins": "57"
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "esp32-s3fn8"
  ],
  "discovery_pitch": "ESP32-S3FN8 (Espressif Systems) 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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    "README.md",
    "esp32-s3fn8.kicad_sym",
    "esp32-s3fn8.kicad_mod",
    "esp32-s3fn8.glb",
    "esp32-s3fn8.step",
    "esp32-s3fn8.lbr",
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    "docs/esp32-s3fn8-datasheet.pdf",
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  "visibility": {
    "public": true
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}