ESP32-C3FH4

{
  "schema_version": 1,
  "type": "component",
  "slug": "esp32-c3fh4",
  "title": "ESP32-C3FH4",
  "brief": "Espressif Systems Microcontrollers (MCU/MPU/SOC), QFN-32-EP(5x5). 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-c3fh4",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "ESP32-C3FH4",
    "manufacturer": "Espressif Systems",
    "package": "QFN-32-EP(5x5)",
    "pin_count": 33,
    "category": "Embedded Processors & Controllers",
    "subcategory": "Microcontrollers (MCU/MPU/SOC)",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588919389660200960",
    "parts": {
      "symbol": "esp32-c3fh4.kicad_sym",
      "footprint": "esp32-c3fh4.kicad_mod",
      "model_3d": "esp32-c3fh4-hero.glb",
      "model_3d_plain": "esp32-c3fh4.glb",
      "model_3d_step": "esp32-c3fh4-etched.step",
      "model_3d_step_plain": "esp32-c3fh4.step",
      "lbr": "esp32-c3fh4.lbr"
    },
    "distributor_links": {
      "lcsc": "C2858491",
      "digikey": "1904-ESP32-C3FH4TR-ND",
      "mouser": "356-ESP32-C3FH4"
    },
    "distributor_check": {
      "checked_at": "2026-10-09T17:55:21Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "1904-ESP32-C3FH4TR-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "356-ESP32-C3FH4",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "LNA_IN",
        "type": "passive",
        "description": "RF low-noise amplifier input/output signal pin for the 2.4 GHz radio."
      },
      {
        "number": "2",
        "name": "VDD3P3",
        "type": "power_in",
        "description": "Analog power-domain supply; recommended input 3.0 V to 3.6 V (3.3 V typical)."
      },
      {
        "number": "3",
        "name": "VDD3P3",
        "type": "power_in",
        "description": "Analog power-domain supply; recommended input 3.0 V to 3.6 V (3.3 V typical)."
      },
      {
        "number": "4",
        "name": "XTAL_32K_P",
        "type": "bidirectional",
        "description": "Positive terminal for an external 32 kHz passive or active crystal/clock input-output; also selectable as GPIO0 and ADC1_CH0, powered from VDD3P3_RTC."
      },
      {
        "number": "5",
        "name": "XTAL_32K_N",
        "type": "bidirectional",
        "description": "Negative terminal for an external 32 kHz passive or active crystal/clock input-output; also selectable as GPIO1 and ADC1_CH1, powered from VDD3P3_RTC."
      },
      {
        "number": "6",
        "name": "GPIO2",
        "type": "bidirectional",
        "description": "General-purpose IO and boot strapping pin (boot mode, with GPIO8/GPIO9); datasheet recommends a pull-up due to pin glitches, default drive 10 mA, also ADC1_CH2 and FSPIQ."
      },
      {
        "number": "7",
        "name": "CHIP_EN",
        "type": "input",
        "description": "Chip enable: high level enables (powers up) the chip, low level shuts it down; must not be left floating."
      },
      {
        "number": "8",
        "name": "GPIO3",
        "type": "bidirectional",
        "description": "General-purpose IO with default drive 10 mA; also ADC1_CH3."
      },
      {
        "number": "9",
        "name": "MTMS",
        "type": "bidirectional",
        "description": "JTAG test mode select (default function), also GPIO4, ADC1_CH4 and FSPIHD; default drive 10 mA, powered from VDD3P3_RTC."
      },
      {
        "number": "10",
        "name": "MTDI",
        "type": "bidirectional",
        "description": "JTAG test data input (default function), also GPIO5, ADC2_CH0 and FSPIWP; default drive 10 mA, powered from VDD3P3_RTC."
      },
      {
        "number": "11",
        "name": "VDD3P3_RTC",
        "type": "power_in",
        "description": "Supply for the RTC and part of the digital power domain (RTC IO); recommended 3.0 V to 3.6 V."
      },
      {
        "number": "12",
        "name": "MTCK",
        "type": "bidirectional",
        "description": "JTAG test clock (default function), also GPIO6 and FSPICLK; may output a 5 ns low-level glitch at power-up, powered from VDD3P3_CPU."
      },
      {
        "number": "13",
        "name": "MTDO",
        "type": "bidirectional",
        "description": "JTAG test data output (default function), also GPIO7 and FSPID; may output a 5 ns low-level glitch at power-up, powered from VDD3P3_CPU."
      },
      {
        "number": "14",
        "name": "GPIO8",
        "type": "bidirectional",
        "description": "General-purpose IO and strapping pin controlling ROM log printing (with EFUSE_UART_PRINT_CONTROL); powered from VDD3P3_CPU."
      },
      {
        "number": "15",
        "name": "GPIO9",
        "type": "bidirectional",
        "description": "General-purpose IO and boot-mode strapping pin with internal weak pull-up enabled at reset; powered from VDD3P3_CPU."
      },
      {
        "number": "16",
        "name": "GPIO10",
        "type": "bidirectional",
        "description": "General-purpose IO (also FSPICS0); may output a 5 ns low-level glitch at power-up, powered from VDD3P3_CPU."
      },
      {
        "number": "17",
        "name": "VDD3P3_CPU",
        "type": "power_in",
        "description": "Supply for the digital power domain and digital IO; recommended 3.0 V to 3.6 V, and must not exceed 3.3 V when writing eFuse."
      },
      {
        "number": "18",
        "name": "VDD_SPI",
        "type": "power_in",
        "description": "Power pin for the in-package (and optionally external) SPI flash; recommended 3.0 V to 3.6 V as input, and it can be driven from VDD3P3_CPU through an internal resistor (RSPI 7.5 Ω) as output."
      },
      {
        "number": "19",
        "name": "SPIHD",
        "type": "bidirectional",
        "description": "SPI flash HOLD# signal for the in-package flash (GPIO12 when not used for flash); connections to flash pins are not recommended for other uses."
      },
      {
        "number": "20",
        "name": "SPIWP",
        "type": "bidirectional",
        "description": "SPI flash write-protect (WP#) signal for the in-package flash (GPIO13 when not used for flash)."
      },
      {
        "number": "21",
        "name": "SPICS0",
        "type": "bidirectional",
        "description": "SPI flash chip-select (CS#) signal for the in-package flash (GPIO14 when not used for flash); a strapping-related default output function."
      },
      {
        "number": "22",
        "name": "SPICLK",
        "type": "bidirectional",
        "description": "SPI flash clock signal for the in-package flash (GPIO15 when not used for flash)."
      },
      {
        "number": "23",
        "name": "SPID",
        "type": "bidirectional",
        "description": "SPI flash data input (DI) for the in-package flash (GPIO16 when not used for flash)."
      },
      {
        "number": "24",
        "name": "SPIQ",
        "type": "bidirectional",
        "description": "SPI flash data output (DO) for the in-package flash (GPIO17 when not used for flash)."
      },
      {
        "number": "25",
        "name": "GPIO18",
        "type": "bidirectional",
        "description": "General-purpose IO; by default configured as USB_D- for the USB serial/JTAG controller, default drive 40 mA, with a high-level glitch of about 50000 ns at power-up."
      },
      {
        "number": "26",
        "name": "GPIO19",
        "type": "bidirectional",
        "description": "General-purpose IO; by default configured as USB_D+ for the USB serial/JTAG controller, default drive 40 mA."
      },
      {
        "number": "27",
        "name": "U0RXD",
        "type": "bidirectional",
        "description": "UART0 receive (default function), also GPIO20; input enabled with weak pull-up at reset and a 5 ns low-level glitch at power-up."
      },
      {
        "number": "28",
        "name": "U0TXD",
        "type": "bidirectional",
        "description": "UART0 transmit (default function), also GPIO21; weak pull-up enabled at reset."
      },
      {
        "number": "29",
        "name": "XTAL_N",
        "type": "passive",
        "description": "Negative terminal of the external main crystal (passive or active) clock input/output; the chip must have an external main crystal to operate."
      },
      {
        "number": "30",
        "name": "XTAL_P",
        "type": "passive",
        "description": "Positive terminal of the external main crystal (passive or active) clock input/output; the chip must have an external main crystal to operate."
      },
      {
        "number": "31",
        "name": "VDDA",
        "type": "power_in",
        "description": "Analog power-domain supply; recommended input 3.0 V to 3.6 V (3.3 V typical)."
      },
      {
        "number": "32",
        "name": "VDDA",
        "type": "power_in",
        "description": "Analog power-domain supply; recommended input 3.0 V to 3.6 V (3.3 V typical)."
      },
      {
        "number": "33",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference; the package's exposed thermal pad is connected to external ground."
      }
    ],
    "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: Datasheet lists VDD_SPI as an input (backup supply for in-package flash, 3.0-3.6 V) and also as an o; The datasheet lists pin 33 as GND only and does not separately describe an exposed thermal pad; the ; Pins 19-24 are the in-package flash SPI pins on the ESP32-C3FH4 (22 GPIO variant). They are connecte",
          "3/33 pins cited to the wrong page (name found elsewhere): ['14:GPIO8@p25', '15:GPIO9@p25', '17:VDD3P3_CPU@p48']"
        ],
        "pages_sent": 47,
        "cost_usd": 0.194,
        "at": "2026-10-09T17:51:20"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588919389660200960",
        "pages": 65,
        "sha256": "85ca330ab81d6967",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 33,
        "described": 33,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "esp32-c3fh4.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          5,
          5,
          0.875
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "5fa713ea46b36980895812ed853577889b7cb06d275041a39b99bc0be305dc79",
        "checked": "2026-10-09",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "esp32-c3fh4-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          5,
          5,
          0.875
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "fdc1873006fac280655fac931603ded0a33a0d46e5bd62c0a3f5f26a3845277c",
        "checked": "2026-10-09",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Espressif Systems",
      "Package": "QFN-32-EP(5x5)",
      "Category": "Embedded Processors & Controllers",
      "Pins": "33"
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "esp32-c3fh4"
  ],
  "discovery_pitch": "ESP32-C3FH4 (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": [
    "page.json",
    "README.md",
    "esp32-c3fh4.kicad_sym",
    "esp32-c3fh4.kicad_mod",
    "esp32-c3fh4.glb",
    "esp32-c3fh4.step",
    "esp32-c3fh4.lbr",
    "docs/hero.png",
    "docs/esp32-c3fh4-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "esp32-c3fh4-hero.glb",
    "esp32-c3fh4-hero.overlay.json"
  ],
  "visibility": {
    "public": true
  }
}