ESP32-U4WDH

{
  "slug": "esp32-u4wdh",
  "version": "0.1.0",
  "type": "component",
  "description": "Espressif Systems RF Transceiver ICs, QFN-48-EP(5x5). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "radio frequency chip-antenna",
    "esp32-u4wdh",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "esp32-u4wdh.kicad_sym",
    "esp32-u4wdh.kicad_mod",
    "esp32-u4wdh.glb",
    "esp32-u4wdh.step",
    "esp32-u4wdh.lbr",
    "docs/hero.png",
    "docs/esp32-u4wdh-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "esp32-u4wdh-hero.glb",
    "esp32-u4wdh-hero.overlay.json",
    "esp32-u4wdh-etched.glb"
  ],
  "component": {
    "mpn": "ESP32-U4WDH",
    "manufacturer": "Espressif Systems",
    "package": "QFN-48-EP(5x5)",
    "pin_count": 49,
    "category": "Radio Frequency Chip/Antenna",
    "subcategory": "RF Transceiver ICs",
    "datasheet": "https://www.espressif.com/sites/default/files/documentation/esp32_datasheet_en.pdf",
    "parts": {
      "symbol": "esp32-u4wdh.kicad_sym",
      "footprint": "esp32-u4wdh.kicad_mod",
      "model_3d": "esp32-u4wdh-hero.glb",
      "model_3d_plain": "esp32-u4wdh-etched.glb",
      "model_3d_step": "esp32-u4wdh-etched.step",
      "model_3d_step_plain": "esp32-u4wdh.step",
      "lbr": "esp32-u4wdh.lbr"
    },
    "distributor_links": {
      "lcsc": "C20622217",
      "digikey": "1904-ESP32-U4WDHTR-ND",
      "mouser": "356-ESP32-U4WDH"
    },
    "distributor_check": {
      "checked_at": "2026-10-22T01:07:57Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "1904-ESP32-U4WDHTR-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "356-ESP32-U4WDH",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "VDDA",
        "type": "power_in",
        "description": "Analog power supply, 2.3 V to 3.6 V."
      },
      {
        "number": "2",
        "name": "LNA_IN",
        "type": "bidirectional",
        "description": "RF input and output pin, carrying the low-noise amplifier input signal and the power amplifier output signal."
      },
      {
        "number": "3",
        "name": "VDD3P3",
        "type": "power_in",
        "description": "Analog power supply, 2.3 V to 3.6 V."
      },
      {
        "number": "4",
        "name": "VDD3P3",
        "type": "power_in",
        "description": "Analog power supply, 2.3 V to 3.6 V."
      },
      {
        "number": "5",
        "name": "SENSOR_VP",
        "type": "input",
        "description": "Input-only pin, GPIO36 with ADC1_CH0 and RTC_GPIO0 functions; it has no output driver or internal pull-up/pull-down."
      },
      {
        "number": "6",
        "name": "SENSOR_CAPP",
        "type": "input",
        "description": "Input-only pin, GPIO37 with ADC1_CH1 and RTC_GPIO1 functions; it has no output driver or internal pull-up/pull-down."
      },
      {
        "number": "7",
        "name": "SENSOR_CAPN",
        "type": "input",
        "description": "Input-only pin, GPIO38 with ADC1_CH2 and RTC_GPIO2 functions; it has no output driver or internal pull-up/pull-down."
      },
      {
        "number": "8",
        "name": "SENSOR_VN",
        "type": "input",
        "description": "Input-only pin, GPIO39 with ADC1_CH3 and RTC_GPIO3 functions; it has no output driver or internal pull-up/pull-down."
      },
      {
        "number": "9",
        "name": "CHIP_PU",
        "type": "input",
        "description": "High enables the chip and low shuts it down; the pin must not be left floating."
      },
      {
        "number": "10",
        "name": "VDET_1",
        "type": "input",
        "description": "Input-only pin, GPIO34 with ADC1_CH6 and RTC_GPIO4 functions; it has no output driver or internal pull-up/pull-down."
      },
      {
        "number": "11",
        "name": "VDET_2",
        "type": "input",
        "description": "Input-only pin, GPIO35 with ADC1_CH7 and RTC_GPIO5 functions; it has no output driver or internal pull-up/pull-down."
      },
      {
        "number": "12",
        "name": "32K_XP",
        "type": "bidirectional",
        "description": "GPIO32 pin that serves as the 32.768 kHz crystal oscillator input, also ADC1_CH4, RTC_GPIO9 and TOUCH9."
      },
      {
        "number": "13",
        "name": "32K_XN",
        "type": "bidirectional",
        "description": "GPIO33 pin that serves as the 32.768 kHz crystal oscillator output, also ADC1_CH5, RTC_GPIO8 and TOUCH8."
      },
      {
        "number": "14",
        "name": "GPIO25",
        "type": "bidirectional",
        "description": "General-purpose I/O with ADC2_CH8, RTC_GPIO6, DAC_1 and EMAC_RXD0 functions, in the VDD3P3_RTC power domain."
      },
      {
        "number": "15",
        "name": "GPIO26",
        "type": "bidirectional",
        "description": "General-purpose I/O with ADC2_CH9, RTC_GPIO7, DAC_2 and EMAC_RXD1 functions, in the VDD3P3_RTC power domain."
      },
      {
        "number": "16",
        "name": "GPIO27",
        "type": "bidirectional",
        "description": "General-purpose I/O with ADC2_CH7, TOUCH7, RTC_GPIO17 and EMAC_RX_DV functions, in the VDD3P3_RTC power domain."
      },
      {
        "number": "17",
        "name": "MTMS",
        "type": "bidirectional",
        "description": "JTAG MTMS signal (GPIO14), also ADC2_CH6, TOUCH6, HSPICLK, HS2_CLK, SD_CLK and EMAC_TXD2 functions, in the VDD3P3_RTC power domain."
      },
      {
        "number": "18",
        "name": "MTDI",
        "type": "bidirectional",
        "description": "JTAG MTDI signal (GPIO12), also ADC2_CH5, TOUCH5, HSPIQ, HS2_DATA2, SD_DATA2 and EMAC_TXD3 functions, in the VDD3P3_RTC power domain."
      },
      {
        "number": "19",
        "name": "VDD3P3_RTC",
        "type": "power_in",
        "description": "Input power supply for RTC IO and the RTC and CPU power domains, 2.3 V to 3.6 V."
      },
      {
        "number": "20",
        "name": "MTCK",
        "type": "bidirectional",
        "description": "JTAG MTCK signal (GPIO13), also ADC2_CH4, TOUCH4, HSPID, HS2_DATA3, SD_DATA3 and EMAC_RX_ER functions, in the VDD3P3_RTC power domain."
      },
      {
        "number": "21",
        "name": "MTDO",
        "type": "bidirectional",
        "description": "JTAG MTDO signal (GPIO15), also ADC2_CH3, TOUCH3, HSPICS0, HS2_CMD, SD_CMD and EMAC_RXD3 functions, in the VDD3P3_RTC power domain."
      },
      {
        "number": "22",
        "name": "GPIO2",
        "type": "bidirectional",
        "description": "General-purpose I/O with ADC2_CH2, TOUCH2, RTC_GPIO12, HSPIWP, HS2_DATA0 and SD_DATA0 functions, in the VDD3P3_RTC power domain."
      },
      {
        "number": "23",
        "name": "GPIO0",
        "type": "bidirectional",
        "description": "General-purpose I/O with ADC2_CH1, TOUCH1, RTC_GPIO11, CLK_OUT1 and EMAC_TX_CLK functions, in the VDD3P3_RTC power domain."
      },
      {
        "number": "24",
        "name": "GPIO4",
        "type": "bidirectional",
        "description": "General-purpose I/O with ADC2_CH0, TOUCH0, RTC_GPIO10, HSPIHD, HS2_DATA1, SD_DATA1 and EMAC_TX_ER functions, in the VDD3P3_RTC power domain."
      },
      {
        "number": "25",
        "name": "GPIO16",
        "type": "bidirectional",
        "description": "General-purpose I/O in the VDD_SDIO power domain, with HS1_DATA4, U2RXD and EMAC_CLK_OUT functions."
      },
      {
        "number": "26",
        "name": "VDD_SDIO",
        "type": "power_out",
        "description": "SDIO IO supply that is the output of an internal LDO fed from VDD3P3_RTC (3.3 V mode through 6 Ω, or 1.8 V mode up to 40 mA), and it can also be driven by an external supply."
      },
      {
        "number": "27",
        "name": "GPIO17",
        "type": "bidirectional",
        "description": "General-purpose I/O in the VDD_SDIO power domain, with HS1_DATA5, U2TXD and EMAC_CLK_OUT_180 functions."
      },
      {
        "number": "28",
        "name": "SD_DATA_2",
        "type": "bidirectional",
        "description": "GPIO9 pin used as SDIO data line 2 (SD_DATA2), also SPIHD, HS1_DATA2 and U1RXD functions, in the VDD_SDIO power domain; the in-package flash/PSRAM-related GPIO guidance applies."
      },
      {
        "number": "29",
        "name": "SD_DATA_3",
        "type": "bidirectional",
        "description": "GPIO10 pin used as SDIO data line 3 (SD_DATA3), also SPIWP, HS1_DATA3 and U1TXD functions, in the VDD_SDIO power domain; the in-package flash/PSRAM-related GPIO guidance applies."
      },
      {
        "number": "30",
        "name": "SD_CMD",
        "type": "bidirectional",
        "description": "GPIO11 pin used as SDIO command (SD_CMD), also SPICS0, HS1_CMD and U1RTS functions, in the VDD_SDIO power domain; the in-package flash/PSRAM-related GPIO guidance applies."
      },
      {
        "number": "31",
        "name": "SD_CLK",
        "type": "bidirectional",
        "description": "GPIO6 pin used as SDIO clock (SD_CLK), also SPICLK, HS1_CLK and U1CTS functions, in the VDD_SDIO power domain; the in-package flash/PSRAM-related GPIO guidance applies."
      },
      {
        "number": "32",
        "name": "SD_DATA_0",
        "type": "bidirectional",
        "description": "GPIO7 pin used as SDIO data line 0 (SD_DATA0), also SPIQ, HS1_DATA0 and U2RTS functions, in the VDD_SDIO power domain; the in-package flash/PSRAM-related GPIO guidance applies."
      },
      {
        "number": "33",
        "name": "SD_DATA_1",
        "type": "bidirectional",
        "description": "GPIO8 pin used as SDIO data line 1 (SD_DATA1), also SPID, HS1_DATA1 and U2CTS functions, in the VDD_SDIO power domain; the in-package flash/PSRAM-related GPIO guidance applies."
      },
      {
        "number": "34",
        "name": "GPIO5",
        "type": "bidirectional",
        "description": "General-purpose I/O in the VDD3P3_CPU power domain, with VSPICS0, HS1_DATA6 and EMAC_RX_CLK functions."
      },
      {
        "number": "35",
        "name": "GPIO18",
        "type": "bidirectional",
        "description": "General-purpose I/O in the VDD3P3_CPU power domain, with VSPICLK and HS1_DATA7 functions."
      },
      {
        "number": "36",
        "name": "GPIO23",
        "type": "bidirectional",
        "description": "General-purpose I/O in the VDD3P3_CPU power domain, with VSPID and HS1_STROBE functions."
      },
      {
        "number": "37",
        "name": "VDD3P3_CPU",
        "type": "power_in",
        "description": "Digital power supply for the CPU and digital IOs, 1.8 V to 3.6 V."
      },
      {
        "number": "38",
        "name": "GPIO19",
        "type": "bidirectional",
        "description": "General-purpose I/O in the VDD3P3_CPU power domain, with VSPIQ, U0CTS and EMAC_TXD0 functions."
      },
      {
        "number": "39",
        "name": "GPIO22",
        "type": "bidirectional",
        "description": "General-purpose I/O in the VDD3P3_CPU power domain, with VSPIWP, U0RTS and EMAC_TXD1 functions."
      },
      {
        "number": "40",
        "name": "U0RXD",
        "type": "bidirectional",
        "description": "UART0 receive pin, also GPIO3 and CLK_OUT2, in the VDD3P3_CPU power domain."
      },
      {
        "number": "41",
        "name": "U0TXD",
        "type": "bidirectional",
        "description": "UART0 transmit pin, also GPIO1, CLK_OUT3 and EMAC_RXD2, in the VDD3P3_CPU power domain."
      },
      {
        "number": "42",
        "name": "GPIO21",
        "type": "bidirectional",
        "description": "General-purpose I/O in the VDD3P3_CPU power domain, with VSPIHD and EMAC_TX_EN functions."
      },
      {
        "number": "43",
        "name": "VDDA",
        "type": "power_in",
        "description": "Analog power supply, 2.3 V to 3.6 V."
      },
      {
        "number": "44",
        "name": "XTAL_N",
        "type": "bidirectional",
        "description": "External clock input/output connected to the chip crystal or oscillator (differential negative side)."
      },
      {
        "number": "45",
        "name": "XTAL_P",
        "type": "bidirectional",
        "description": "External clock input/output connected to the chip crystal or oscillator (differential positive side)."
      },
      {
        "number": "46",
        "name": "VDDA",
        "type": "power_in",
        "description": "Analog power supply, 2.3 V to 3.6 V."
      },
      {
        "number": "47",
        "name": "CAP2",
        "type": "input",
        "description": "Connects to a 3.3 nF series capacitor to ground, as stated in the revision history for Table 2-1."
      },
      {
        "number": "48",
        "name": "CAP1",
        "type": "input",
        "description": "Connects to a 10 nF series capacitor to ground."
      },
      {
        "number": "49",
        "name": "GND",
        "type": "power_in",
        "description": "External ground connection; the exposed pad on the package is the ground connection."
      }
    ],
    "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: Table 2-1 pin overview page 15 (pins 22-47 rows) is not in the supplied text. Pins 22-47 were taken ; CAP2 (pin 47) has no Table 2-1 row in the supplied text. Its description comes from a revision-histo; The datasheet says the GPIOs used for in-package flash/PSRAM communication should not be used for ot",
          "1/49 pins cited to the wrong page (name found elsewhere): ['47:CAP2@p73']"
        ],
        "pages_sent": 48,
        "cost_usd": 0.2323,
        "at": "2026-10-22T01:06:53"
      },
      "datasheet": {
        "url": "https://www.espressif.com/sites/default/files/documentation/esp32_datasheet_en.pdf",
        "pages": 78,
        "sha256": "a7917e6b47528c9d",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 49,
        "described": 49,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "esp32-u4wdh.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          5.0,
          5.0,
          1.1
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "bdef7330531c8a62fd1740be5d4ee88a2520275cd173f5de2a729248fb1c21a0",
        "checked": "2026-10-22",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "esp32-u4wdh-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          5.0,
          5.0,
          1.1
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "20c727a98ee82da0d306bfb91a3e285198412be21fee4c0e239764060a476441",
        "checked": "2026-10-22",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}