ESP32-C3-MINI-1U-H4X

{
  "slug": "esp32-c3-mini-1u-h4x",
  "version": "0.1.0",
  "type": "component",
  "description": "Espressif Systems RF and Wireless, 61-SMD Module. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "rf and wireless",
    "esp32-c3-mini-1u-h4x",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "esp32-c3-mini-1u-h4x.kicad_sym",
    "esp32-c3-mini-1u-h4x.kicad_mod",
    "esp32-c3-mini-1u-h4x.glb",
    "esp32-c3-mini-1u-h4x.step",
    "esp32-c3-mini-1u-h4x.lbr",
    "docs/hero.png",
    "docs/esp32-c3-mini-1u-h4x-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "esp32-c3-mini-1u-h4x-hero.glb",
    "esp32-c3-mini-1u-h4x-hero.overlay.json",
    "esp32-c3-mini-1u-h4x-etched.glb"
  ],
  "component": {
    "mpn": "ESP32-C3-MINI-1U-H4X",
    "manufacturer": "Espressif Systems",
    "package": "61-SMD Module",
    "pin_count": 53,
    "category": "RF and Wireless",
    "subcategory": "RF and Wireless",
    "datasheet": "https://www.espressif.com/sites/default/files/documentation/esp32-c3-mini-1_datasheet_en.pdf",
    "parts": {
      "symbol": "esp32-c3-mini-1u-h4x.kicad_sym",
      "footprint": "esp32-c3-mini-1u-h4x.kicad_mod",
      "model_3d": "esp32-c3-mini-1u-h4x-hero.glb",
      "model_3d_plain": "esp32-c3-mini-1u-h4x-etched.glb",
      "model_3d_step": "esp32-c3-mini-1u-h4x-etched.step",
      "model_3d_step_plain": "esp32-c3-mini-1u-h4x.step",
      "lbr": "esp32-c3-mini-1u-h4x.lbr"
    },
    "distributor_links": {
      "digikey": "1965-ESP32-C3-MINI-1U-H4XTR-ND",
      "mouser": "356-ESP32C3MINI1UH4X"
    },
    "distributor_check": {
      "checked_at": "2026-10-28T17:43:34Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "1965-ESP32-C3-MINI-1U-H4XTR-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "356-ESP32C3MINI1UH4X",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin of the module (Table 3-1 lists pins 1, 2, 11, 14 and 36-53 as ground)."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin of the module (Table 3-1 lists pins 1, 2, 11, 14 and 36-53 as ground)."
      },
      {
        "number": "3",
        "name": "3V3",
        "type": "power_in",
        "description": "Module power supply pin; recommended supply is 3.0 V to 3.6 V with 3.3 V typical, and absolute maximum is 3.6 V."
      },
      {
        "number": "4",
        "name": "NC",
        "type": "unconnected",
        "description": "Not connected on the module; the datasheet gives no function for this pin."
      },
      {
        "number": "5",
        "name": "IO2",
        "type": "bidirectional",
        "description": "GPIO2 with ADC1_CH2 and FSPIQ functions; it is a chip boot mode strapping pin and is floating by default at reset."
      },
      {
        "number": "6",
        "name": "IO3",
        "type": "bidirectional",
        "description": "GPIO3 with ADC1_CH3 function."
      },
      {
        "number": "7",
        "name": "NC",
        "type": "unconnected",
        "description": "Not connected on the module; the datasheet gives no function for this pin."
      },
      {
        "number": "8",
        "name": "EN",
        "type": "input",
        "description": "Chip enable: high turns the chip on, low powers it off, and the pin must not be left floating."
      },
      {
        "number": "9",
        "name": "NC",
        "type": "unconnected",
        "description": "Not connected on the module; the datasheet gives no function for this pin."
      },
      {
        "number": "10",
        "name": "NC",
        "type": "unconnected",
        "description": "Not connected on the module; the datasheet gives no function for this pin."
      },
      {
        "number": "11",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin of the module (Table 3-1 lists pins 1, 2, 11, 14 and 36-53 as ground)."
      },
      {
        "number": "12",
        "name": "IO0",
        "type": "bidirectional",
        "description": "GPIO0 with ADC1_CH0 and XTAL_32K_P functions."
      },
      {
        "number": "13",
        "name": "IO1",
        "type": "bidirectional",
        "description": "GPIO1 with ADC1_CH1 and XTAL_32K_N functions."
      },
      {
        "number": "14",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin of the module (Table 3-1 lists pins 1, 2, 11, 14 and 36-53 as ground)."
      },
      {
        "number": "15",
        "name": "NC",
        "type": "unconnected",
        "description": "Not connected on the module; the datasheet gives no function for this pin."
      },
      {
        "number": "16",
        "name": "IO10",
        "type": "bidirectional",
        "description": "GPIO10 with FSPICS0 function."
      },
      {
        "number": "17",
        "name": "NC",
        "type": "unconnected",
        "description": "Not connected on the module; the datasheet gives no function for this pin."
      },
      {
        "number": "18",
        "name": "IO4",
        "type": "bidirectional",
        "description": "GPIO4 with ADC1_CH4, FSPIHD and MTMS functions."
      },
      {
        "number": "19",
        "name": "IO5",
        "type": "bidirectional",
        "description": "GPIO5 with ADC2_CH0, FSPIWP and MTDI functions."
      },
      {
        "number": "20",
        "name": "IO6",
        "type": "bidirectional",
        "description": "GPIO6 with FSPICLK and MTCK functions."
      },
      {
        "number": "21",
        "name": "IO7",
        "type": "bidirectional",
        "description": "GPIO7 with FSPID and MTDO functions."
      },
      {
        "number": "22",
        "name": "IO8",
        "type": "bidirectional",
        "description": "GPIO8; it is a chip boot mode and ROM message printing strapping pin and is floating by default at reset."
      },
      {
        "number": "23",
        "name": "IO9",
        "type": "bidirectional",
        "description": "GPIO9; it is a chip boot mode strapping pin with an internal weak pull-up, so it reads 1 by default."
      },
      {
        "number": "24",
        "name": "NC",
        "type": "unconnected",
        "description": "Not connected on the module; the datasheet gives no function for this pin."
      },
      {
        "number": "25",
        "name": "NC",
        "type": "unconnected",
        "description": "Not connected on the module; the datasheet gives no function for this pin."
      },
      {
        "number": "26",
        "name": "IO18",
        "type": "bidirectional",
        "description": "GPIO18 with USB_D- function for the USB Serial/JTAG interface."
      },
      {
        "number": "27",
        "name": "IO19",
        "type": "bidirectional",
        "description": "GPIO19 with USB_D+ function for the USB Serial/JTAG interface."
      },
      {
        "number": "28",
        "name": "NC",
        "type": "unconnected",
        "description": "Not connected on the module; the datasheet gives no function for this pin."
      },
      {
        "number": "29",
        "name": "NC",
        "type": "unconnected",
        "description": "Not connected on the module; the datasheet gives no function for this pin."
      },
      {
        "number": "30",
        "name": "RXD0",
        "type": "bidirectional",
        "description": "GPIO20 with U0RXD function, the UART0 receive signal used for download and log output."
      },
      {
        "number": "31",
        "name": "TXD0",
        "type": "bidirectional",
        "description": "GPIO21 with U0TXD function, the UART0 transmit signal used for download and log output."
      },
      {
        "number": "32",
        "name": "NC",
        "type": "unconnected",
        "description": "Not connected on the module; the datasheet gives no function for this pin."
      },
      {
        "number": "33",
        "name": "NC",
        "type": "unconnected",
        "description": "Not connected on the module; the datasheet gives no function for this pin."
      },
      {
        "number": "34",
        "name": "NC",
        "type": "unconnected",
        "description": "Not connected on the module; the datasheet gives no function for this pin."
      },
      {
        "number": "35",
        "name": "NC",
        "type": "unconnected",
        "description": "Not connected on the module; the datasheet gives no function for this pin."
      },
      {
        "number": "36",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin of the module (Table 3-1 lists pins 1, 2, 11, 14 and 36-53 as ground)."
      },
      {
        "number": "37",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin of the module (Table 3-1 lists pins 1, 2, 11, 14 and 36-53 as ground)."
      },
      {
        "number": "38",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin of the module (Table 3-1 lists pins 1, 2, 11, 14 and 36-53 as ground)."
      },
      {
        "number": "39",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin of the module (Table 3-1 lists pins 1, 2, 11, 14 and 36-53 as ground)."
      },
      {
        "number": "40",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin of the module (Table 3-1 lists pins 1, 2, 11, 14 and 36-53 as ground)."
      },
      {
        "number": "41",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin of the module (Table 3-1 lists pins 1, 2, 11, 14 and 36-53 as ground)."
      },
      {
        "number": "42",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin of the module (Table 3-1 lists pins 1, 2, 11, 14 and 36-53 as ground)."
      },
      {
        "number": "43",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin of the module (Table 3-1 lists pins 1, 2, 11, 14 and 36-53 as ground)."
      },
      {
        "number": "44",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin of the module (Table 3-1 lists pins 1, 2, 11, 14 and 36-53 as ground)."
      },
      {
        "number": "45",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin of the module (Table 3-1 lists pins 1, 2, 11, 14 and 36-53 as ground)."
      },
      {
        "number": "46",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin of the module (Table 3-1 lists pins 1, 2, 11, 14 and 36-53 as ground)."
      },
      {
        "number": "47",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin of the module (Table 3-1 lists pins 1, 2, 11, 14 and 36-53 as ground)."
      },
      {
        "number": "48",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin of the module (Table 3-1 lists pins 1, 2, 11, 14 and 36-53 as ground)."
      },
      {
        "number": "49",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin of the module (Table 3-1 lists pins 1, 2, 11, 14 and 36-53 as ground); Figure 9-1 labels it EPAD, and soldering it to the base board ground is optional but improves thermal performance."
      },
      {
        "number": "50",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin of the module (Table 3-1 lists pins 1, 2, 11, 14 and 36-53 as ground)."
      },
      {
        "number": "51",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin of the module (Table 3-1 lists pins 1, 2, 11, 14 and 36-53 as ground)."
      },
      {
        "number": "52",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin of the module (Table 3-1 lists pins 1, 2, 11, 14 and 36-53 as ground)."
      },
      {
        "number": "53",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin of the module (Table 3-1 lists pins 1, 2, 11, 14 and 36-53 as 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: Package hint says 61-SMD, but the datasheet states the module has 53 pins (Section 3.2, Table 3-1 nu; Pin 26 name is garbled in the source text ('USB_D�'). I read it as USB_D- from the USB_D+ pairing on; Table 3-1 names pins 30 and 31 RXD0 and TXD0, but the function column lists them as GPIO20/U0RXD and"
        ],
        "pages_sent": 23,
        "cost_usd": 0.0756,
        "at": "2026-10-28T17:44:05"
      },
      "datasheet": {
        "url": "https://www.espressif.com/sites/default/files/documentation/esp32-c3-mini-1_datasheet_en.pdf",
        "pages": 48,
        "sha256": "de7361381348d82a",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 53,
        "described": 53,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "esp32-c3-mini-1u-h4x.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          13.2,
          12.5,
          2.4
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.65,
        "footprint_binding": "identity",
        "sha256": "0fc499783339ef732bbc273f13a16e5d66f1b9636f64bc12d2bb1b46f9a55d1b",
        "checked": "2026-10-28",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "esp32-c3-mini-1u-h4x-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          13.2,
          12.5,
          2.4
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.65,
        "footprint_binding": "identity",
        "sha256": "0549cf42a0a3596f41d4313e70051b76ac79821e608e1c06aceaaac5a37de755",
        "checked": "2026-10-28",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}