ESP32-C3-MINI-1U-N4

{
  "schema_version": 1,
  "type": "component",
  "slug": "esp32-c3-mini-1u-n4",
  "title": "ESP32-C3-MINI-1U-N4",
  "brief": "Espressif Systems WiFi Modules, ESP32-C3-MINI-1U. 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",
    "iot-communication modules",
    "esp32-c3-mini-1u-n4",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "ESP32-C3-MINI-1U-N4",
    "manufacturer": "Espressif Systems",
    "package": "ESP32-C3-MINI-1U",
    "pin_count": 53,
    "category": "IoT/Communication Modules",
    "subcategory": "WiFi Modules",
    "datasheet": "https://www.espressif.com/sites/default/files/documentation/esp32-c3-mini-1_datasheet_en.pdf",
    "parts": {
      "symbol": "esp32-c3-mini-1u-n4.kicad_sym",
      "footprint": "esp32-c3-mini-1u-n4.kicad_mod",
      "model_3d": "esp32-c3-mini-1u-n4-hero.glb",
      "model_3d_plain": "esp32-c3-mini-1u-n4-etched.glb",
      "model_3d_step": "esp32-c3-mini-1u-n4-etched.step",
      "model_3d_step_plain": "esp32-c3-mini-1u-n4.step",
      "lbr": "esp32-c3-mini-1u-n4.lbr"
    },
    "distributor_links": {
      "lcsc": "C2911374",
      "digikey": "1965-ESP32-C3-MINI-1U-N4TR-ND",
      "mouser": "356-ESP32-C3MINI1UN4"
    },
    "distributor_check": {
      "checked_at": "2026-10-28T17:44:32Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "1965-ESP32-C3-MINI-1U-N4TR-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "356-ESP32-C3MINI1UN4",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin."
      },
      {
        "number": "3",
        "name": "3V3",
        "type": "power_in",
        "description": "Power supply pin; the module supply VDD33 is specified at 3.0 V to 3.6 V (3.3 V typical) with an absolute maximum of 3.6 V."
      },
      {
        "number": "4",
        "name": "NC",
        "type": "unconnected",
        "description": "Not connected; no function is assigned to this pin on the module."
      },
      {
        "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; no function is assigned to this pin on the module."
      },
      {
        "number": "8",
        "name": "EN",
        "type": "input",
        "description": "High enables the chip and low powers it off; the pin must not be left floating."
      },
      {
        "number": "9",
        "name": "NC",
        "type": "unconnected",
        "description": "Not connected; no function is assigned to this pin on the module."
      },
      {
        "number": "10",
        "name": "NC",
        "type": "unconnected",
        "description": "Not connected; no function is assigned to this pin on the module."
      },
      {
        "number": "11",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin."
      },
      {
        "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."
      },
      {
        "number": "15",
        "name": "NC",
        "type": "unconnected",
        "description": "Not connected; no function is assigned to this pin on the module."
      },
      {
        "number": "16",
        "name": "IO10",
        "type": "bidirectional",
        "description": "GPIO10 with FSPICS0 function."
      },
      {
        "number": "17",
        "name": "NC",
        "type": "unconnected",
        "description": "Not connected; no function is assigned to this pin on the module."
      },
      {
        "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 strapping pin used for chip boot mode and ROM message printing control, and is floating by default at reset."
      },
      {
        "number": "23",
        "name": "IO9",
        "type": "bidirectional",
        "description": "GPIO9; it is a chip boot-mode strapping pin with a weak pull-up by default (bit value 1)."
      },
      {
        "number": "24",
        "name": "NC",
        "type": "unconnected",
        "description": "Not connected; no function is assigned to this pin on the module."
      },
      {
        "number": "25",
        "name": "NC",
        "type": "unconnected",
        "description": "Not connected; no function is assigned to this pin on the module."
      },
      {
        "number": "26",
        "name": "IO18",
        "type": "bidirectional",
        "description": "GPIO18 with USB_D- function."
      },
      {
        "number": "27",
        "name": "IO19",
        "type": "bidirectional",
        "description": "GPIO19 with USB_D+ function."
      },
      {
        "number": "28",
        "name": "NC",
        "type": "unconnected",
        "description": "Not connected; no function is assigned to this pin on the module."
      },
      {
        "number": "29",
        "name": "NC",
        "type": "unconnected",
        "description": "Not connected; no function is assigned to this pin on the module."
      },
      {
        "number": "30",
        "name": "RXD0",
        "type": "bidirectional",
        "description": "GPIO20 with U0RXD function (UART0 receive)."
      },
      {
        "number": "31",
        "name": "TXD0",
        "type": "bidirectional",
        "description": "GPIO21 with U0TXD function (UART0 transmit)."
      },
      {
        "number": "32",
        "name": "NC",
        "type": "unconnected",
        "description": "Not connected; no function is assigned to this pin on the module."
      },
      {
        "number": "33",
        "name": "NC",
        "type": "unconnected",
        "description": "Not connected; no function is assigned to this pin on the module."
      },
      {
        "number": "34",
        "name": "NC",
        "type": "unconnected",
        "description": "Not connected; no function is assigned to this pin on the module."
      },
      {
        "number": "35",
        "name": "NC",
        "type": "unconnected",
        "description": "Not connected; no function is assigned to this pin on the module."
      },
      {
        "number": "36",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin."
      },
      {
        "number": "37",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin."
      },
      {
        "number": "38",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin."
      },
      {
        "number": "39",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin."
      },
      {
        "number": "40",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin."
      },
      {
        "number": "41",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin."
      },
      {
        "number": "42",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin."
      },
      {
        "number": "43",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin."
      },
      {
        "number": "44",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin."
      },
      {
        "number": "45",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin."
      },
      {
        "number": "46",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin."
      },
      {
        "number": "47",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin."
      },
      {
        "number": "48",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin."
      },
      {
        "number": "49",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin; this is the exposed 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."
      },
      {
        "number": "51",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin."
      },
      {
        "number": "52",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin."
      },
      {
        "number": "53",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin."
      }
    ],
    "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 MPN ESP32-C3-MINI-1U-N4 is listed as NRND (not recommended for new designs) in Table 1-2; the da; The Table 1-2 row for N4 shares the 13.2 x 12.5 x 2.4 mm embedded size with the other MINI-1U varian; Pin 49 is listed as GND in Table 3-1 but labelled EPAD in the schematic (Figure 9-1); it is recorded"
        ],
        "pages_sent": 23,
        "cost_usd": 0.0751,
        "at": "2026-10-28T17:43:53"
      },
      "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-n4.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,
        "centre_offset_mm": 0.65,
        "footprint_binding": "identity",
        "sha256": "1f2430a0eb81fce6e2c505160e1c3aaf92008218bfedb3a29d730fb1873f8bf8",
        "checked": "2026-10-28",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "esp32-c3-mini-1u-n4-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,
        "centre_offset_mm": 0.65,
        "footprint_binding": "identity",
        "sha256": "fc3af2f2a0a10fb06a3bd9085b80d648dce3536b38a5616c9540c0ac1e0204fb",
        "checked": "2026-10-28",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Espressif Systems",
      "Package": "ESP32-C3-MINI-1U",
      "Category": "IoT/Communication Modules",
      "Pins": "53"
    },
    "appearance": {
      "contacts": {
        "quote": "CONTACT MATERIAL: COPPER ALLOY, GOLD PLATED ALL OVER;",
        "page": 36,
        "doc": "ds.pdf",
        "material": "COPPER ALLOY",
        "plating": "gold"
      },
      "housing": {
        "quote": "HOUSING MATERIAL: THERMOPLASTIC, WHITE, UL 94V-0;",
        "page": 36,
        "doc": "ds.pdf",
        "material": "THERMOPLASTIC"
      },
      "shell": {
        "quote": "SHELL MATERIAL: COPPER ALLOY, GOLD PLATED ALL OVER;",
        "page": 36,
        "doc": "ds.pdf",
        "material": "COPPER ALLOY",
        "plating": "gold"
      },
      "version": 1,
      "datasheet_sha256": "de7361381348d82a1abd337f10170be7a420675987568f71fe3c5b100deed270"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "de7361381348d82a1abd337f10170be7a420675987568f71fe3c5b100deed270",
      "rows": [
        {
          "name": "Absolute maximum power supply voltage",
          "symbol": "VDD33",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 3.6,
          "conditions": "",
          "source_page": 21,
          "source": "datasheet"
        },
        {
          "name": "Power supply voltage",
          "symbol": "VDD33",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 3,
          "typ": 3.3,
          "max": 3.6,
          "conditions": "",
          "source_page": 21,
          "source": "datasheet"
        },
        {
          "name": "Current delivered by external power supply",
          "symbol": "IVDD",
          "kind": "recommended_operating",
          "unit": "A",
          "min": 0.5,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 21,
          "source": "datasheet"
        },
        {
          "name": "Operating ambient temperature",
          "symbol": "TA",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 85,
          "conditions": "85 °C version",
          "source_page": 21,
          "source": "datasheet"
        },
        {
          "name": "High-level input current",
          "symbol": "IIH",
          "kind": "electrical",
          "unit": "nA",
          "min": null,
          "typ": null,
          "max": 50,
          "conditions": "",
          "source_page": 21,
          "source": "datasheet"
        },
        {
          "name": "Low-level input current",
          "symbol": "IIL",
          "kind": "electrical",
          "unit": "nA",
          "min": null,
          "typ": null,
          "max": 50,
          "conditions": "",
          "source_page": 21,
          "source": "datasheet"
        },
        {
          "name": "Flash power supply voltage (1.8 V)",
          "symbol": "VCC",
          "kind": "electrical",
          "unit": "V",
          "min": 1.65,
          "typ": 1.8,
          "max": 2,
          "conditions": "Power supply voltage (1.8 V)",
          "source_page": 23,
          "source": "datasheet"
        },
        {
          "name": "Flash power supply voltage (3.3 V)",
          "symbol": "VCC",
          "kind": "electrical",
          "unit": "V",
          "min": 2.7,
          "typ": 3.3,
          "max": 3.6,
          "conditions": "Power supply voltage (3.3 V)",
          "source_page": 23,
          "source": "datasheet"
        },
        {
          "name": "Flash maximum clock frequency",
          "symbol": "FC",
          "kind": "electrical",
          "unit": "MHz",
          "min": 80,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 23,
          "source": "datasheet"
        },
        {
          "name": "Flash program/erase cycles",
          "symbol": "",
          "kind": "electrical",
          "unit": "cycles",
          "min": 100000,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 23,
          "source": "datasheet"
        },
        {
          "name": "Flash data retention time",
          "symbol": "TRET",
          "kind": "electrical",
          "unit": "years",
          "min": 20,
          "typ": null,
          "max": null,
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        },
        {
          "name": "Flash page program time",
          "symbol": "TPP",
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          "max": 5,
          "conditions": "",
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        },
        {
          "name": "Flash sector erase time (4 KB)",
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        {
          "name": "Flash block erase time (32 KB)",
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          "typ": 0.2,
          "max": 2,
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          "source": "datasheet"
        },
        {
          "name": "Flash block erase time (64 KB)",
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          "typ": 0.3,
          "max": 3,
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        },
        {
          "name": "Flash chip erase time (16 Mb)",
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          "max": 20,
          "conditions": "16 Mb",
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        {
          "name": "Flash chip erase time (32 Mb)",
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        {
          "name": "Flash chip erase time (64 Mb)",
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        {
          "name": "Flash chip erase time (128 Mb)",
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        {
          "name": "Flash chip erase time (256 Mb)",
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          "max": 300,
          "conditions": "256 Mb",
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        },
        {
          "name": "Wi-Fi center frequency range of operating channel",
          "symbol": "",
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          "source_page": 25,
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        },
        {
          "name": "Bluetooth LE center frequency range of operating channel",
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          "unit": "MHz",
          "min": 2402,
          "typ": null,
          "max": 2480,
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          "source_page": 27,
          "source": "datasheet"
        },
        {
          "name": "RF transmit power range (Bluetooth LE)",
          "symbol": "",
          "kind": "electrical",
          "unit": "dBm",
          "min": -24,
          "typ": null,
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          "source_page": 27,
          "source": "datasheet"
        },
        {
          "name": "TX EVM limit 802.11b 1 Mbps",
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          "source_page": 25,
          "source": "datasheet"
        },
        {
          "name": "TX EVM limit 802.11b 11 Mbps",
          "symbol": "",
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          "min": null,
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          "conditions": "802.11b, 11 Mbps, @20.5 dBm",
          "source_page": 25,
          "source": "datasheet"
        },
        {
          "name": "TX EVM limit 802.11g 6 Mbps",
          "symbol": "",
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          "source": "datasheet"
        },
        {
          "name": "TX EVM limit 802.11g 54 Mbps",
          "symbol": "",
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