LAN7850T-I

{
  "schema_version": 1,
  "type": "component",
  "slug": "lan7850t-i",
  "title": "LAN7850T-I",
  "brief": "Microchip Tech Ethernet Controllers, QFN-56-EP(8x8). Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "interface",
    "lan7850t-i"
  ],
  "component": {
    "mpn": "LAN7850T-I",
    "manufacturer": "Microchip Tech",
    "package": "QFN-56-EP(8x8)",
    "pin_count": 57,
    "category": "Interface",
    "subcategory": "Ethernet Controllers",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588884172920262656",
    "parts": {
      "symbol": "lan7850t-i.kicad_sym",
      "footprint": "lan7850t-i.kicad_mod",
      "model_3d": "lan7850t-i-etched.glb",
      "model_3d_plain": "lan7850t-i.glb",
      "model_3d_step": "lan7850t-i-etched.step",
      "model_3d_step_plain": "lan7850t-i.step",
      "lbr": "lan7850t-i.lbr"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "TR0P",
        "type": "bidirectional",
        "description": "Gigabit Ethernet transmit/receive positive channel 0 (AIO)."
      },
      {
        "number": "2",
        "name": "TR0N",
        "type": "bidirectional",
        "description": "Gigabit Ethernet transmit/receive negative channel 0 (AIO)."
      },
      {
        "number": "3",
        "name": "VDD25A",
        "type": "power_in",
        "description": "+2.5V analog supply input for Gigabit Ethernet PHY."
      },
      {
        "number": "4",
        "name": "TR1P",
        "type": "bidirectional",
        "description": "Gigabit Ethernet transmit/receive positive channel 1 (AIO)."
      },
      {
        "number": "5",
        "name": "TR1N",
        "type": "bidirectional",
        "description": "Gigabit Ethernet transmit/receive negative channel 1 (AIO)."
      },
      {
        "number": "6",
        "name": "VDD25A",
        "type": "power_in",
        "description": "+2.5V analog supply input for Gigabit Ethernet PHY."
      },
      {
        "number": "7",
        "name": "TR2P",
        "type": "bidirectional",
        "description": "Gigabit Ethernet transmit/receive positive channel 2 (AIO)."
      },
      {
        "number": "8",
        "name": "TR2N",
        "type": "bidirectional",
        "description": "Gigabit Ethernet transmit/receive negative channel 2 (AIO)."
      },
      {
        "number": "9",
        "name": "VDD25A",
        "type": "power_in",
        "description": "+2.5V analog supply input for Gigabit Ethernet PHY."
      },
      {
        "number": "10",
        "name": "TR3P",
        "type": "bidirectional",
        "description": "Gigabit Ethernet transmit/receive positive channel 3 (AIO)."
      },
      {
        "number": "11",
        "name": "TR3N",
        "type": "bidirectional",
        "description": "Gigabit Ethernet transmit/receive negative channel 3 (AIO)."
      },
      {
        "number": "12",
        "name": "VDD25A",
        "type": "power_in",
        "description": "+2.5V analog supply input for Gigabit Ethernet PHY."
      },
      {
        "number": "13",
        "name": "VDDVARIO",
        "type": "power_in",
        "description": "+1.8V to +3.3V variable I/O supply."
      },
      {
        "number": "14",
        "name": "TDI",
        "type": "input",
        "description": "JTAG test data input (VIS buffer)."
      },
      {
        "number": "15",
        "name": "TDO",
        "type": "output",
        "description": "JTAG test data output (O12 buffer)."
      },
      {
        "number": "16",
        "name": "TCK/GPIO0",
        "type": "bidirectional",
        "description": "JTAG test clock, alternate function GPIO0. Max clock is half the system clock."
      },
      {
        "number": "17",
        "name": "TMS",
        "type": "input",
        "description": "JTAG test mode select (VIS buffer)."
      },
      {
        "number": "18",
        "name": "VDD12_SW_OUT",
        "type": "power_out",
        "description": "+1.2V output voltage from integrated switching regulator."
      },
      {
        "number": "19",
        "name": "VDD_SW_IN",
        "type": "power_in",
        "description": "+3.3V input voltage for the integrated switching regulator."
      },
      {
        "number": "20",
        "name": "VDD12_SW_FB",
        "type": "passive",
        "description": "Feedback pin for integrated switching regulator. Tie to VDD_SW_IN to disable the switcher."
      },
      {
        "number": "21",
        "name": "EECS/GPIO1",
        "type": "output",
        "description": "External EEPROM chip select output (O12). Alternate function GPIO1."
      },
      {
        "number": "22",
        "name": "EEDI/GPIO2",
        "type": "input",
        "description": "External EEPROM data input (driven by EEPROM DO). Alternate function GPIO2."
      },
      {
        "number": "23",
        "name": "EEDO/GPIO3",
        "type": "output",
        "description": "External EEPROM data output driving EEPROM DI (O12). Alternate function GPIO3."
      },
      {
        "number": "24",
        "name": "EECLK/GPIO4",
        "type": "output",
        "description": "External EEPROM clock output (O12). Alternate function GPIO4."
      },
      {
        "number": "25",
        "name": "VDDVARIO",
        "type": "power_in",
        "description": "+1.8V to +3.3V variable I/O supply."
      },
      {
        "number": "26",
        "name": "VDD12CORE",
        "type": "power_in",
        "description": "+1.2V digital core power supply input."
      },
      {
        "number": "27",
        "name": "VBUS_DET",
        "type": "input",
        "description": "Detects state of upstream USB bus power (VIS with pull-down). For bus-powered operation tie to VDD33A."
      },
      {
        "number": "28",
        "name": "SUSPEND_N/GPIO5",
        "type": "output",
        "description": "Asserted when device is in a suspend state (O12). May control an external switcher. Alternate function GPIO5."
      },
      {
        "number": "29",
        "name": "CONNECT/GPIO6",
        "type": "output",
        "description": "USB CONNECT output - asserts when device is attempting to attach to USB host (O12). Alternate function GPIO6."
      },
      {
        "number": "30",
        "name": "HSIC_SEL",
        "type": "input",
        "description": "HSIC select: tie to VDD to enable HSIC interface, otherwise USB 2.0 interface is enabled. Static signal, do not change at runtime."
      },
      {
        "number": "31",
        "name": "LED0/GPIO7",
        "type": "output",
        "description": "Indicator LED0 (OD12), configurable for link/activity/duplex/collision. Alternate function GPIO7."
      },
      {
        "number": "32",
        "name": "PME_MODE/GPIO8",
        "type": "input",
        "description": "PME mode selection input when PME mode is active (VIS). Alternate function GPIO8."
      },
      {
        "number": "33",
        "name": "VDD12A",
        "type": "power_in",
        "description": "+1.2V analog supply input for USB PLL/AFE."
      },
      {
        "number": "34",
        "name": "VDD12HSIC",
        "type": "power_in",
        "description": "+1.2V HSIC power supply input."
      },
      {
        "number": "35",
        "name": "STROBE",
        "type": "bidirectional",
        "description": "HSIC bi-directional data strobe signal per HSIC Electrical Specification."
      },
      {
        "number": "36",
        "name": "USB_DP",
        "type": "bidirectional",
        "description": "Hi-Speed USB 2.0 D+ data line (AIO)."
      },
      {
        "number": "37",
        "name": "USB_DM",
        "type": "bidirectional",
        "description": "Hi-Speed USB 2.0 D- data line (AIO)."
      },
      {
        "number": "38",
        "name": "DATA",
        "type": "bidirectional",
        "description": "HSIC bi-directional DDR data signal, synchronous to STROBE."
      },
      {
        "number": "39",
        "name": "PME_N",
        "type": "output",
        "description": "Active-low PME signal output (O8/OD8), asserted during PME operation."
      },
      {
        "number": "40",
        "name": "TEST",
        "type": "input",
        "description": "Test pin, for internal purposes only. Must be tied to ground for proper operation."
      },
      {
        "number": "41",
        "name": "RESET_N/PME_CLEAR",
        "type": "input",
        "description": "Active-low system reset (VIS). Also serves as PME clear input when PME mode is active. Pull up to VDD if unused."
      },
      {
        "number": "42",
        "name": "VDDVARIO",
        "type": "power_in",
        "description": "+1.8V to +3.3V variable I/O supply."
      },
      {
        "number": "43",
        "name": "USBRBIAS",
        "type": "passive",
        "description": "USB HS bias reference. Connect to external 12kΩ 1.0% resistor to ground to set HS transmit current and on-chip termination."
      },
      {
        "number": "44",
        "name": "VDD33A",
        "type": "power_in",
        "description": "+3.3V analog supply for USB 2.0 AFE."
      },
      {
        "number": "45",
        "name": "VDDVARIO",
        "type": "power_in",
        "description": "+1.8V to +3.3V variable I/O supply."
      },
      {
        "number": "46",
        "name": "XI",
        "type": "input",
        "description": "External 25 MHz crystal input. May also be driven by a single-ended clock oscillator (leave XO open)."
      },
      {
        "number": "47",
        "name": "XO",
        "type": "output",
        "description": "External 25 MHz crystal output. Leave unconnected if XI is driven by an external oscillator."
      },
      {
        "number": "48",
        "name": "VDD12CORE",
        "type": "power_in",
        "description": "+1.2V digital core power supply input."
      },
      {
        "number": "49",
        "name": "LED1/GPIO9",
        "type": "output",
        "description": "Indicator LED1 (OD12), configurable for link/activity/duplex/collision. Alternate function GPIO9."
      },
      {
        "number": "50",
        "name": "LED2/GPIO10",
        "type": "output",
        "description": "Indicator LED2 (OD12), configurable for link/activity/duplex/collision. Alternate function GPIO10."
      },
      {
        "number": "51",
        "name": "LED3/GPIO11",
        "type": "output",
        "description": "Indicator LED3 (OD12), configurable for link/activity/duplex/collision. Alternate function GPIO11."
      },
      {
        "number": "52",
        "name": "VDD12A",
        "type": "power_in",
        "description": "+1.2V analog supply input for USB PLL/AFE."
      },
      {
        "number": "53",
        "name": "VDD25_REG_OUT",
        "type": "power_out",
        "description": "+2.5V output from integrated LDO used to supply Gigabit Ethernet PHY AFE."
      },
      {
        "number": "54",
        "name": "VDD33_REG_IN",
        "type": "power_in",
        "description": "+3.3V input supply to integrated LDO."
      },
      {
        "number": "55",
        "name": "REF_REXT",
        "type": "passive",
        "description": "External PHY reference resistor. Connect to external 2kΩ 1.0% resistor to ground."
      },
      {
        "number": "56",
        "name": "REF_FILT",
        "type": "passive",
        "description": "External PHY reference filter. Connect to external 1µF capacitor to ground."
      },
      {
        "number": "57",
        "name": "VSS",
        "type": "power_in",
        "description": "Exposed thermal pad. Common ground; must be connected to ground for proper operation and thermal performance."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588884172920262656",
        "pages": 277,
        "sha256": "41b2cc2942c4219b",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 57,
        "described": 57,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    }
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Microchip Tech",
      "Package": "QFN-56-EP(8x8)",
      "Category": "Interface",
      "Pins": "57"
    }
  },
  "variants": [
    {
      "mpn": "LAN7850T-I",
      "kind": "packaging"
    },
    {
      "mpn": "LAN7850T-I/YZX",
      "kind": "packaging"
    }
  ],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "lan7850t-i"
  ],
  "discovery_pitch": "LAN7850T-I (Microchip Tech) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "lan7850t-i.kicad_sym",
    "lan7850t-i.kicad_mod",
    "lan7850t-i.glb",
    "lan7850t-i.step",
    "lan7850t-i.lbr",
    "docs/hero.png",
    "docs/lan7850t-i-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "visibility": {
    "public": true
  },
  "updated_at": "2026-09-24T23:41:49.577Z"
}