VSC8531XMW-05

{
  "slug": "vsc8531xmw-05",
  "version": "0.1.0",
  "type": "component",
  "description": "Microchip Tech Telecommunication Interface ICs, QFN-48-EP(6x6). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "interface ics",
    "vsc8531xmw-05",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
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    "path": "docs/hero.png"
  },
  "files": [
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    "README.md",
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    "vsc8531xmw-05.kicad_mod",
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    "vsc8531xmw-05.step",
    "vsc8531xmw-05.lbr",
    "docs/hero.png",
    "docs/vsc8531xmw-05-datasheet.pdf",
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    "vsc8531xmw-05-hero.overlay.json",
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  "component": {
    "mpn": "VSC8531XMW-05",
    "manufacturer": "Microchip Tech",
    "package": "QFN-48-EP(6x6)",
    "pin_count": 49,
    "category": "Interface ICs",
    "subcategory": "Telecommunication Interface ICs",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/5cc6f1d6cad35b9742605880c7158f5c.pdf",
    "parts": {
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      "lbr": "vsc8531xmw-05.lbr"
    },
    "distributor_links": {
      "lcsc": "C1522132",
      "digikey": "VSC8531XMW-05-ND",
      "mouser": "494-VSC8531XMW-05"
    },
    "distributor_check": {
      "checked_at": "2026-11-02T17:01:47Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "VSC8531XMW-05-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "494-VSC8531XMW-05",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "VDD25A",
        "type": "power_in",
        "description": "2.5 V analog power supply, requiring additional PCB power supply filtering; recommended range 2.38 V to 2.62 V."
      },
      {
        "number": "2",
        "name": "VDD1A",
        "type": "power_in",
        "description": "1.0 V analog power supply, requiring additional PCB power supply filtering; recommended range 0.95 V to 1.05 V."
      },
      {
        "number": "3",
        "name": "P0_D3N",
        "type": "passive",
        "description": "Cu PHY media Tx/Rx channel D negative signal (analog differential pair, VDD25A domain)."
      },
      {
        "number": "4",
        "name": "P0_D3P",
        "type": "passive",
        "description": "Cu PHY media Tx/Rx channel D positive signal (analog differential pair, VDD25A domain)."
      },
      {
        "number": "5",
        "name": "VDD25A",
        "type": "power_in",
        "description": "2.5 V analog power supply, requiring additional PCB power supply filtering; recommended range 2.38 V to 2.62 V."
      },
      {
        "number": "6",
        "name": "P0_D2N",
        "type": "passive",
        "description": "Cu PHY media Tx/Rx channel C negative signal (analog differential pair, VDD25A domain)."
      },
      {
        "number": "7",
        "name": "P0_D2P",
        "type": "passive",
        "description": "Cu PHY media Tx/Rx channel C positive signal (analog differential pair, VDD25A domain)."
      },
      {
        "number": "8",
        "name": "VDD25A",
        "type": "power_in",
        "description": "2.5 V analog power supply, requiring additional PCB power supply filtering; recommended range 2.38 V to 2.62 V."
      },
      {
        "number": "9",
        "name": "P0_D1N",
        "type": "passive",
        "description": "Cu PHY media Tx/Rx channel B negative signal (analog differential pair, VDD25A domain)."
      },
      {
        "number": "10",
        "name": "P0_D1P",
        "type": "passive",
        "description": "Cu PHY media Tx/Rx channel B positive signal (analog differential pair, VDD25A domain)."
      },
      {
        "number": "11",
        "name": "P0_D0N",
        "type": "passive",
        "description": "Cu PHY media Tx/Rx channel A negative signal (analog differential pair, VDD25A domain)."
      },
      {
        "number": "12",
        "name": "P0_D0P",
        "type": "passive",
        "description": "Cu PHY media Tx/Rx channel A positive signal (analog differential pair, VDD25A domain)."
      },
      {
        "number": "13",
        "name": "VDD1A",
        "type": "power_in",
        "description": "1.0 V analog power supply, requiring additional PCB power supply filtering; recommended range 0.95 V to 1.05 V."
      },
      {
        "number": "14",
        "name": "VDD1",
        "type": "power_in",
        "description": "1.0 V digital core power; recommended range 0.95 V to 1.05 V."
      },
      {
        "number": "15",
        "name": "VDDMAC",
        "type": "power_in",
        "description": "RGMII/RMII MAC power supply at 1.5 V, 1.8 V, 2.5 V, or 3.3 V; recommended range 1.425 V to 3.465 V depending on selected level."
      },
      {
        "number": "16",
        "name": "RXD3",
        "type": "bidirectional",
        "description": "RGMII receive data output bit 3 (RMII/RGMII shared pin, VDDMAC domain); its logic state is latched on the rising edge of NRESET for configuration."
      },
      {
        "number": "17",
        "name": "RXD2",
        "type": "bidirectional",
        "description": "RGMII receive data output bit 2 (RMII/RGMII shared pin, VDDMAC domain); its logic state is latched on the rising edge of NRESET for configuration."
      },
      {
        "number": "18",
        "name": "RXD1",
        "type": "bidirectional",
        "description": "RGMII receive data output bit 1 (RMII/RGMII shared pin, VDDMAC domain); its logic state is latched on the rising edge of NRESET for configuration."
      },
      {
        "number": "19",
        "name": "VDDMAC",
        "type": "power_in",
        "description": "RGMII/RMII MAC power supply at 1.5 V, 1.8 V, 2.5 V, or 3.3 V; recommended range 1.425 V to 3.465 V depending on selected level."
      },
      {
        "number": "20",
        "name": "RXD0",
        "type": "bidirectional",
        "description": "RGMII receive data output bit 0 (RMII/RGMII shared pin, VDDMAC domain); its logic state is latched on the rising edge of NRESET for configuration."
      },
      {
        "number": "21",
        "name": "RX_CTL",
        "type": "bidirectional",
        "description": "RGMII receive control output (RMII/RGMII shared pin, VDDMAC domain); its logic state is latched on the rising edge of NRESET for configuration."
      },
      {
        "number": "22",
        "name": "RX_CLK",
        "type": "bidirectional",
        "description": "RGMII receive clock output (carries RMII_CLKOUT in RMII mode, 50 MHz); its logic state is latched on the rising edge of NRESET for configuration."
      },
      {
        "number": "23",
        "name": "TX_CTL",
        "type": "input",
        "description": "RGMII transmit data control input (VDDMAC domain, internal pull-down)."
      },
      {
        "number": "24",
        "name": "VDD1",
        "type": "power_in",
        "description": "1.0 V digital core power; recommended range 0.95 V to 1.05 V."
      },
      {
        "number": "25",
        "name": "TX_CLK",
        "type": "input",
        "description": "RGMII transmit clock input (VDDMAC domain, internal pull-down)."
      },
      {
        "number": "26",
        "name": "TXD0",
        "type": "input",
        "description": "RGMII data input bit 0 (VDDMAC domain, internal pull-down)."
      },
      {
        "number": "27",
        "name": "VDDMAC",
        "type": "power_in",
        "description": "RGMII/RMII MAC power supply at 1.5 V, 1.8 V, 2.5 V, or 3.3 V; recommended range 1.425 V to 3.465 V depending on selected level."
      },
      {
        "number": "28",
        "name": "TXD1",
        "type": "input",
        "description": "RGMII data input bit 1 (VDDMAC domain, internal pull-down)."
      },
      {
        "number": "29",
        "name": "TXD2",
        "type": "input",
        "description": "RGMII data input bit 2 (VDDMAC domain, internal pull-down)."
      },
      {
        "number": "30",
        "name": "TXD3",
        "type": "input",
        "description": "RGMII data input bit 3 (VDDMAC domain, internal pull-down)."
      },
      {
        "number": "31",
        "name": "MDC",
        "type": "input",
        "description": "Management data clock reference input for the SMI, 0 MHz to 12.5 MHz, referenced to VDDMDIO."
      },
      {
        "number": "32",
        "name": "VDDMDIO",
        "type": "power_in",
        "description": "Power for SMI pins at 1.2 V, 1.5 V, 1.8 V, 2.5 V, or 3.3 V; recommended range 1.14 V to 3.465 V depending on selected level."
      },
      {
        "number": "33",
        "name": "MDIO",
        "type": "bidirectional",
        "description": "Management data input/output, synchronous to the positive edge of MDC; requires one external pull-up resistor at the station manager."
      },
      {
        "number": "34",
        "name": "MDINT",
        "type": "output",
        "description": "Management interrupt, open-drain output that can be wired-OR with other MDINT pins using a single pull-up resistor."
      },
      {
        "number": "35",
        "name": "NRESET",
        "type": "input",
        "description": "Active-low device reset input that powers down the device and sets all register bits to default; the NRESET pulse width must be at least 100 ns."
      },
      {
        "number": "36",
        "name": "CLKOUT",
        "type": "bidirectional",
        "description": "Programmable-frequency clock output (125, 50 or 25 MHz) derived from the reference clock, disabled and held low by default and inactive while NRESET is asserted."
      },
      {
        "number": "37",
        "name": "VDDIO",
        "type": "power_in",
        "description": "2.5 V or 3.3 V general I/O power; recommended range 2.38 V to 3.465 V depending on selected level."
      },
      {
        "number": "38",
        "name": "LED1",
        "type": "output",
        "description": "Active-low LED direct drive output; carries LED_CLK in serial LED mode."
      },
      {
        "number": "39",
        "name": "LED0",
        "type": "output",
        "description": "Active-low LED direct drive output; carries LED_DATA in serial LED mode."
      },
      {
        "number": "40",
        "name": "REFCLK_SEL_1",
        "type": "input",
        "description": "Reference clock mode/frequency select input with internal pull-up, referenced to VDDIO."
      },
      {
        "number": "41",
        "name": "REFCLK_SEL_0",
        "type": "input",
        "description": "Reference clock mode/frequency select input with internal pull-up, referenced to VDDIO."
      },
      {
        "number": "42",
        "name": "XTAL1",
        "type": "input",
        "description": "Crystal or single-ended reference clock input, referenced to VDD25A."
      },
      {
        "number": "43",
        "name": "XTAL2",
        "type": "output",
        "description": "Crystal output; leave unconnected when using a single-ended reference clock."
      },
      {
        "number": "44",
        "name": "RESERVED_1",
        "type": "unconnected",
        "description": "Reserved signal; leave unconnected."
      },
      {
        "number": "45",
        "name": "RESERVED_0",
        "type": "unconnected",
        "description": "Reserved signal; leave unconnected."
      },
      {
        "number": "46",
        "name": "REF_FILT",
        "type": "passive",
        "description": "Reference filter; connect to an external 0.01 µF (20%) capacitor to analog ground."
      },
      {
        "number": "47",
        "name": "VDD1A",
        "type": "power_in",
        "description": "1.0 V analog power supply, requiring additional PCB power supply filtering; recommended range 0.95 V to 1.05 V."
      },
      {
        "number": "48",
        "name": "REF_REXT",
        "type": "passive",
        "description": "Reference resistor connection; connect to an external 2 kΩ (1%) resistor to analog ground."
      },
      {
        "number": "49",
        "name": "EP",
        "type": "passive",
        "description": "Exposed pad (from the footprint; not named in the datasheet pin table)."
      }
    ],
    "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 datasheet's QFN-48 exposed pad (package ground) has no pin number, so it is not listed in pins. ",
          "1/49 pins cited to the wrong page (name found elsewhere): ['42:XTAL1@p77']",
          "1/49 pin names appear NOWHERE in the datasheet text: ['43:XTAL2@p77']"
        ],
        "pages_sent": 21,
        "cost_usd": 0.0533,
        "at": "2026-11-02T17:01:30"
      },
      "datasheet": {
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        "pages": 85,
        "sha256": "73781f7b86d5935c",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 49,
        "described": 49,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
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        "sha256": "9f1a8fb3c296077167cea630558358908149ac9e5a19367b10c87992eb13ee47",
        "checked": "2026-11-02",
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}