ESP8266EX

{
  "schema_version": 1,
  "type": "component",
  "slug": "esp8266ex",
  "title": "ESP8266EX",
  "brief": "Espressif Systems RF Transceiver ICs, 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",
    "rf and wireless",
    "esp8266ex",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "ESP8266EX",
    "manufacturer": "Espressif Systems",
    "package": "QFN-32-EP(5x5)",
    "pin_count": 33,
    "category": "RF And Wireless",
    "subcategory": "RF Transceiver ICs",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586175446068678656",
    "parts": {
      "symbol": "esp8266ex.kicad_sym",
      "footprint": "esp8266ex.kicad_mod",
      "model_3d": "esp8266ex-hero.glb",
      "model_3d_plain": "esp8266ex-etched.glb",
      "model_3d_step": "esp8266ex-etched.step",
      "model_3d_step_plain": "esp8266ex.step",
      "lbr": "esp8266ex.lbr"
    },
    "distributor_links": {
      "lcsc": "C77967",
      "digikey": "1904-1001-2-ND",
      "mouser": "356-ESP8266EX"
    },
    "distributor_check": {
      "checked_at": "2026-10-17T02:50:28Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "1904-1001-2-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "356-ESP8266EX",
        "status": "found",
        "lifecycle": "Not Recommended for New Designs"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "VDDA",
        "type": "power_in",
        "description": "Analog supply pin, 2.5 V to 3.6 V."
      },
      {
        "number": "2",
        "name": "LNA",
        "type": "bidirectional",
        "description": "RF antenna interface with chip output impedance of 39 + j6 Ω; a π-type matching network is recommended between the chip and the antenna."
      },
      {
        "number": "3",
        "name": "VDD3P3",
        "type": "power_in",
        "description": "Power amplifier supply, 2.5 V to 3.6 V."
      },
      {
        "number": "4",
        "name": "VDD3P3",
        "type": "power_in",
        "description": "Power amplifier supply, 2.5 V to 3.6 V."
      },
      {
        "number": "5",
        "name": "VDD_RTC",
        "type": "unconnected",
        "description": "Listed as NC with a 1.1 V level in the pin table, so it is not for external connection."
      },
      {
        "number": "6",
        "name": "TOUT",
        "type": "input",
        "description": "Internal ADC input that can measure VDD3P3 or the TOUT voltage (not both at once); when used with an external circuit the input range is 0 V to 1.0 V, and the hardware design requires this pin to be left floating."
      },
      {
        "number": "7",
        "name": "CHIP_EN",
        "type": "input",
        "description": "Chip enable: high enables normal operation, low shuts the chip down with very low current."
      },
      {
        "number": "8",
        "name": "XPD_DCDC",
        "type": "bidirectional",
        "description": "Deep-sleep wake-up pin, also GPIO16; only the internal pull-down can be enabled on this pad."
      },
      {
        "number": "9",
        "name": "MTMS",
        "type": "bidirectional",
        "description": "GPIO14, also HSPI_CLK; can be configured with internal pull-up or pull-down and as a tri-state output."
      },
      {
        "number": "10",
        "name": "MTDI",
        "type": "bidirectional",
        "description": "GPIO12, also HSPI_MISO."
      },
      {
        "number": "11",
        "name": "VDDPST",
        "type": "power_in",
        "description": "Digital/IO supply, 1.8 V to 3.6 V."
      },
      {
        "number": "12",
        "name": "MTCK",
        "type": "bidirectional",
        "description": "GPIO13, also HSPI_MOSI and UART0_CTS."
      },
      {
        "number": "13",
        "name": "MTDO",
        "type": "bidirectional",
        "description": "GPIO15, also HSPI_CS and UART0_RTS; used with GPIO2 and GPIO0 for boot mode and SDIO mode selection."
      },
      {
        "number": "14",
        "name": "GPIO2",
        "type": "bidirectional",
        "description": "GPIO2, also UART1_TX usable when burning flash; used with GPIO0 and MTDO for boot mode and SDIO mode selection."
      },
      {
        "number": "15",
        "name": "GPIO0",
        "type": "bidirectional",
        "description": "GPIO0, also SPI_CS2; used with GPIO2 and MTDO for boot mode and SDIO mode selection."
      },
      {
        "number": "16",
        "name": "GPIO4",
        "type": "bidirectional",
        "description": "GPIO4, also PWM3."
      },
      {
        "number": "17",
        "name": "VDDPST",
        "type": "power_in",
        "description": "Digital/IO supply, 1.8 V to 3.6 V."
      },
      {
        "number": "18",
        "name": "SDIO_DATA_2",
        "type": "bidirectional",
        "description": "Connected to SD_D2 through a 200 Ω series resistor; also HSPIHD and GPIO9."
      },
      {
        "number": "19",
        "name": "SDIO_DATA_3",
        "type": "bidirectional",
        "description": "Connected to SD_D3 through a 200 Ω series resistor; also SPIWP, HSPIWP and GPIO10."
      },
      {
        "number": "20",
        "name": "SDIO_CMD",
        "type": "bidirectional",
        "description": "Connected to SD_CMD through a 200 Ω series resistor; also SPI_CS0 and GPIO11."
      },
      {
        "number": "21",
        "name": "SDIO_CLK",
        "type": "bidirectional",
        "description": "Connected to SD_CLK through a 200 Ω series resistor; also SPI_CLK and GPIO6."
      },
      {
        "number": "22",
        "name": "SDIO_DATA_0",
        "type": "bidirectional",
        "description": "Connected to SD_D0 through a 200 Ω series resistor; also SPI_MISO and GPIO7."
      },
      {
        "number": "23",
        "name": "SDIO_DATA_1",
        "type": "bidirectional",
        "description": "Connected to SD_D1 through a 200 Ω series resistor; also SPI_MOSI and GPIO8."
      },
      {
        "number": "24",
        "name": "GPIO5",
        "type": "bidirectional",
        "description": "GPIO5, also IR RX."
      },
      {
        "number": "25",
        "name": "U0RXD",
        "type": "bidirectional",
        "description": "UART0 RX usable when burning flash, also GPIO3."
      },
      {
        "number": "26",
        "name": "U0TXD",
        "type": "bidirectional",
        "description": "UART0 TX usable when burning flash, also GPIO1 and SPI_CS1; should not be pulled low externally during power-up."
      },
      {
        "number": "27",
        "name": "XTAL_OUT",
        "type": "bidirectional",
        "description": "Crystal oscillator output, which can also provide the clock input for BT."
      },
      {
        "number": "28",
        "name": "XTAL_IN",
        "type": "bidirectional",
        "description": "Crystal oscillator input."
      },
      {
        "number": "29",
        "name": "VDDD",
        "type": "power_in",
        "description": "Analog supply, 2.5 V to 3.6 V."
      },
      {
        "number": "30",
        "name": "VDDA",
        "type": "power_in",
        "description": "Analog supply, 2.5 V to 3.6 V."
      },
      {
        "number": "31",
        "name": "RES12K",
        "type": "input",
        "description": "Connect through a 12 kΩ series resistor to ground."
      },
      {
        "number": "32",
        "name": "EXT_RSTB",
        "type": "input",
        "description": "External reset signal, active low."
      },
      {
        "number": "33",
        "name": "GND",
        "type": "power_in",
        "description": "Ground (exposed pad), shown as pin 33 in the pin layout diagram; not listed in Table 2-1."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
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        "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: Table 2-1 lists the type as P but the function as NC (1.1 V); typed as unconnected, please confirm a; Pin 33 GND appears only in the layout diagram text on page 10 and is not in Table 2-1; included as t; Datasheet gives both a 0 V to 1.0 V input range when an external circuit is connected and a requirem"
        ],
        "pages_sent": 32,
        "cost_usd": 0.1194,
        "at": "2026-10-17T02:50:07"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586175446068678656",
        "pages": 32,
        "sha256": "4e8b483c552a4926",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 33,
        "described": 33,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
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  "metadata": {
    "specs": {
      "Manufacturer": "Espressif Systems",
      "Package": "QFN-32-EP(5x5)",
      "Category": "RF And Wireless",
      "Pins": "33"
    },
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          "symbol": "",
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          "min": 2.5,
          "typ": 3.3,
          "max": 3.6,
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        {
          "name": "Operating temperature range",
          "symbol": "",
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          "unit": "℃",
          "min": -40,
          "typ": null,
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        {
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          "typ": null,
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        {
          "name": "PA supply (VDD3P3, pins 3, 4)",
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        {
          "name": "Analog supply (VDDD, pin 29)",
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          "min": 2.5,
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        {
          "name": "Digital/IO supply (VDDPST, pins 11, 17)",
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        {
          "name": "TOUT input voltage",
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          "max": 1,
          "conditions": "TOUT pin connected to external circuit",
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        {
          "name": "Low-level input voltage (lower limit)",
          "symbol": "VIL",
          "kind": "electrical",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": null,
          "conditions": "",
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        {
          "name": "Low-level input voltage (upper limit)",
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          "kind": "electrical",
          "unit": "VIO",
          "min": null,
          "typ": null,
          "max": 0.25,
          "conditions": "",
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        {
          "name": "High-level input voltage (lower limit)",
          "symbol": "VIH",
          "kind": "electrical",
          "unit": "VIO",
          "min": 0.75,
          "typ": null,
          "max": null,
          "conditions": "",
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        },
        {
          "name": "High-level input voltage (upper limit)",
          "symbol": "VIH",
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          "unit": "V",
          "min": null,
          "typ": null,
          "max": 3.6,
          "conditions": "",
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        {
          "name": "Low-level output voltage",
          "symbol": "VOL",
          "kind": "electrical",
          "unit": "VIO",
          "min": null,
          "typ": null,
          "max": 0.1,
          "conditions": "",
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        {
          "name": "High-level output voltage",
          "symbol": "VOH",
          "kind": "electrical",
          "unit": "VIO",
          "min": 0.8,
          "typ": null,
          "max": null,
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        },
        {
          "name": "Maximum I/O current",
          "symbol": "IMAX",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 12,
          "conditions": "",
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        {
          "name": "ESD human body model (HBM)",
          "symbol": "",
          "kind": "electrical",
          "unit": "KV",
          "min": null,
          "typ": null,
          "max": 2,
          "conditions": "TAMB = 25 ℃",
          "source_page": 25,
          "source": "datasheet"
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        {
          "name": "ESD charged device model (CDM)",
          "symbol": "",
          "kind": "electrical",
          "unit": "KV",
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          "max": 0.5,
          "conditions": "TAMB = 25 ℃",
          "source_page": 25,
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        },
        {
          "name": "Maximum soldering temperature",
          "symbol": "",
          "kind": "thermal",
          "unit": "℃",
          "min": null,
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          "conditions": "IPC/JEDEC J-STD-020",
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        {
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          "min": 10,
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        {
          "name": "EXT_RSTB rise time",
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          "kind": "timing",
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          "min": 0,
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          "max": 2,
          "conditions": "",
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          "name": "EXT_RSTB rises after VDD33 high",
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          "min": 0.1,
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        {
          "name": "CHIP_EN rise time",
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          "name": "CHIP_EN rises after EXT_RSTB high",
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          "kind": "timing",
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          "min": 0.1,
          "typ": null,
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          "conditions": "",
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        {
          "name": "PA output power",
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          "kind": "electrical",
          "unit": "dBm",
          "min": 15.5,
          "typ": 16.5,
          "max": 17.5,
          "conditions": "72.2 Mbps",
          "source_page": 26,
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        {
          "name": "Input frequency",
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          "kind": "electrical",
          "unit": "MHz",
          "min": 2412,
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        {
          "name": "PA output power (802.11b mode)",
          "symbol": "",
          "kind": "electrical",
          "unit": "dBm",
          "min": 19.5,
          "typ": 20.5,
          "max": 21.5,
          "conditions": "11b mode",
          "source_page": 27,
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        {
          "name": "Crystal frequency",
          "symbol": "FXO",
          "kind": "electrical",
          "unit": "MHz",
          "min": 24,
          "typ": null,
          "max": 52,
          "conditions": "",
          "source_page": 14,
          "source": "datasheet"
        },
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          "name": "Crystal load capacitance",
          "symbol": "CL",
          "kind": "electrical",
          "unit": "pF",
          "min": null,
          "typ": null,
          "max": 32,
          "conditions": "",
          "source_page": 14,
          "source": "datasheet"
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        {
          "name": "Crystal motional capacitance",
          "symbol": "CM",
          "kind": "electrical",
          "unit": "pF",
          "min": 2,
          "typ": null,
          "max": 5,
          "conditions": "",
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        {
          "name": "Crystal series resistance",
          "symbol": "RS",
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          "unit": "Ω",
          "min": 0,
          "typ": null,
          "max": 65,
          "conditions": "",
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          "source": "datasheet"
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        {
          "name": "Crystal frequency tolerance",
          "symbol": "ΔFXO",
          "kind": "tolerance",
          "unit": "ppm",
          "min": -15,
          "typ": null,
          "max": 15,
          "conditions": "",
          "source_page": 14,
          "source": "datasheet"
        },
        {
          "name": "Crystal frequency vs temperature",
          "symbol": "ΔFXO,Temp",
          "kind": "tolerance",
          "unit": "ppm",
          "min": -15,
          "typ": null,
          "max": 15,
          "conditions": "–25 °C ~ 75 °C",
          "source_page": 14,
          "source": "datasheet"
        },
        {
          "name": "External clock amplitude",
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          "kind": "electrical",
          "unit": "Vpp",
          "min": 0.8,
          "typ": null,
          "max": 1.5,
          "conditions": "",
          "source_page": 15,
          "source": "datasheet"
        },
        {
          "name": "External clock accuracy",
          "symbol": "ΔFXO,EXT",
          "kind": "tolerance",
          "unit": "ppm",
          "min": -15,
          "typ": null,
          "max": 15,
          "conditions": "",
          "source_page": 15,
          "source": "datasheet"
        },
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          "name": "Clock phase noise",
          "symbol": "",
          "kind": "electrical",
          "unit": "dBc/Hz",
          "min": null,
          "typ": null,
          "max": -120,
          "conditions": "@1kHz 偏移, 40 MHz 时钟",
          "source_page": 15,
          "source": "datasheet"
        },
        {
          "name": "Clock phase noise",
          "symbol": "",
          "kind": "electrical",
          "unit": "dBc/Hz",
          "min": null,
          "typ": null,
          "max": -130,
          "conditions": "@10 kHz 偏移, 40 MHz 时钟",
          "source_page": 15,
          "source": "datasheet"
        },
        {
          "name": "Clock phase noise",
          "symbol": "",
          "kind": "electrical",
          "unit": "dBc/Hz",
          "min": null,
          "typ": null,
          "max": -138,
          "conditions": "@100 kHz 偏移, 40 MHz 时钟",
          "source_page": 15,
          "source": "datasheet"
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    "email": "[email protected]"
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    "esp8266ex-hero.glb",
    "esp8266ex-hero.overlay.json",
    "esp8266ex-etched.glb"
  ],
  "visibility": {
    "public": true
  }
}