KSZ9031RNXIC

{
  "schema_version": 1,
  "type": "component",
  "slug": "ksz9031rnxic",
  "title": "KSZ9031RNXIC",
  "brief": "Microchip Tech Ethernet Transceivers, QFN-48-EP(7x7). 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",
    "interface",
    "ksz9031rnxic",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "KSZ9031RNXIC",
    "manufacturer": "Microchip Tech",
    "package": "QFN-48-EP(7x7)",
    "pin_count": 49,
    "category": "Interface",
    "subcategory": "Ethernet Transceivers",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588886747790905344",
    "parts": {
      "symbol": "ksz9031rnxic.kicad_sym",
      "footprint": "ksz9031rnxic.kicad_mod",
      "model_3d": "ksz9031rnxic-hero.glb",
      "model_3d_plain": "ksz9031rnxic-etched.glb",
      "model_3d_step": "ksz9031rnxic-etched.step",
      "model_3d_step_plain": "ksz9031rnxic.step",
      "lbr": "ksz9031rnxic.lbr"
    },
    "distributor_links": {
      "lcsc": "C633480"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T10:38:08Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "AVDDH",
        "type": "power_in",
        "description": "3.3V or 2.5V analog VDD for the transceiver, commercial temperature only."
      },
      {
        "number": "2",
        "name": "TXRXP_A",
        "type": "bidirectional",
        "description": "Media Dependent Interface[0] positive differential signal; BI_DA+ in 1000BASE-T MDI mode, TX+ or RX+ in 10/100 mode depending on MDI/MDI-X."
      },
      {
        "number": "3",
        "name": "TXRXM_A",
        "type": "bidirectional",
        "description": "Media Dependent Interface[0] negative differential signal; BI_DA- in 1000BASE-T MDI mode, TX- or RX- in 10/100 mode depending on MDI/MDI-X."
      },
      {
        "number": "4",
        "name": "AVDDL",
        "type": "power_in",
        "description": "1.2V analog VDD for the core."
      },
      {
        "number": "5",
        "name": "TXRXP_B",
        "type": "bidirectional",
        "description": "Media Dependent Interface[1] positive differential signal; BI_DB+ in 1000BASE-T MDI mode, RX+ or TX+ in 10/100 mode depending on MDI/MDI-X."
      },
      {
        "number": "6",
        "name": "TXRXM_B",
        "type": "bidirectional",
        "description": "Media Dependent Interface[1] negative differential signal; BI_DB- in 1000BASE-T MDI mode, RX- or TX- in 10/100 mode depending on MDI/MDI-X."
      },
      {
        "number": "7",
        "name": "TXRXP_C",
        "type": "bidirectional",
        "description": "Media Dependent Interface[2] positive differential signal; BI_DC+ in 1000BASE-T MDI mode and not used in 10BASE-T/100BASE-TX mode."
      },
      {
        "number": "8",
        "name": "TXRXM_C",
        "type": "bidirectional",
        "description": "Media Dependent Interface[2] negative differential signal; BI_DC- in 1000BASE-T MDI mode and not used in 10BASE-T/100BASE-TX mode."
      },
      {
        "number": "9",
        "name": "AVDDL",
        "type": "power_in",
        "description": "1.2V analog VDD for the core."
      },
      {
        "number": "10",
        "name": "TXRXP_D",
        "type": "bidirectional",
        "description": "Media Dependent Interface[3] positive differential signal; BI_DD+ in 1000BASE-T MDI mode and not used in 10BASE-T/100BASE-TX mode."
      },
      {
        "number": "11",
        "name": "TXRXM_D",
        "type": "bidirectional",
        "description": "Media Dependent Interface[3] negative differential signal; BI_DD- in 1000BASE-T MDI mode and not used in 10BASE-T/100BASE-TX mode."
      },
      {
        "number": "12",
        "name": "AVDDH",
        "type": "power_in",
        "description": "3.3V or 2.5V analog VDD for the transceiver, commercial temperature only."
      },
      {
        "number": "13",
        "name": "NC",
        "type": "unconnected",
        "description": "Not bonded; may be connected to digital ground for footprint compatibility with the KSZ9021RN."
      },
      {
        "number": "14",
        "name": "DVDDL",
        "type": "power_in",
        "description": "1.2V digital VDD for the core."
      },
      {
        "number": "15",
        "name": "LED2/PHYAD1",
        "type": "bidirectional",
        "description": "Programmable LED2 output; its pull-up or pull-down is latched as PHYAD[1] during power-up/reset."
      },
      {
        "number": "16",
        "name": "DVDDH",
        "type": "power_in",
        "description": "3.3V, 2.5V, or 1.8V digital VDD for I/O."
      },
      {
        "number": "17",
        "name": "LED1/PHYAD0/PME_N1",
        "type": "bidirectional",
        "description": "Programmable LED1 output; voltage is sampled at power-up/reset as PHYAD[0], and as PME_N1 output it requires an external pull-up to DVDDH of 1.0 kΩ to 4.7 kΩ and is not open-drain in all modes."
      },
      {
        "number": "18",
        "name": "DVDDL",
        "type": "power_in",
        "description": "1.2V digital VDD for the core."
      },
      {
        "number": "19",
        "name": "TXD0",
        "type": "input",
        "description": "RGMII TD0 transmit data input from the MAC."
      },
      {
        "number": "20",
        "name": "TXD1",
        "type": "input",
        "description": "RGMII TD1 transmit data input from the MAC."
      },
      {
        "number": "21",
        "name": "TXD2",
        "type": "input",
        "description": "RGMII TD2 transmit data input from the MAC."
      },
      {
        "number": "22",
        "name": "TXD3",
        "type": "input",
        "description": "RGMII TD3 transmit data input from the MAC."
      },
      {
        "number": "23",
        "name": "DVDDL",
        "type": "power_in",
        "description": "1.2V digital VDD for the core."
      },
      {
        "number": "24",
        "name": "GTX_CLK",
        "type": "input",
        "description": "RGMII TXC transmit reference clock input from the MAC."
      },
      {
        "number": "25",
        "name": "TX_EN",
        "type": "input",
        "description": "RGMII TX_CTL transmit control input from the MAC."
      },
      {
        "number": "26",
        "name": "DVDDL",
        "type": "power_in",
        "description": "1.2V digital VDD for the core."
      },
      {
        "number": "27",
        "name": "RXD3/MODE3",
        "type": "bidirectional",
        "description": "RGMII RD3 receive data output; its pull-up or pull-down is latched as MODE3 during power-up/reset."
      },
      {
        "number": "28",
        "name": "RXD2/MODE2",
        "type": "bidirectional",
        "description": "RGMII RD2 receive data output; its pull-up or pull-down is latched as MODE2 during power-up/reset."
      },
      {
        "number": "29",
        "name": "VSS",
        "type": "power_in",
        "description": "Digital ground."
      },
      {
        "number": "30",
        "name": "DVDDL",
        "type": "power_in",
        "description": "1.2V digital VDD for the core."
      },
      {
        "number": "31",
        "name": "RXD1/MODE1",
        "type": "bidirectional",
        "description": "RGMII RD1 receive data output; its pull-up or pull-down is latched as MODE1 during power-up/reset."
      },
      {
        "number": "32",
        "name": "RXD0/MODE0",
        "type": "bidirectional",
        "description": "RGMII RD0 receive data output; its pull-up or pull-down is latched as MODE0 during power-up/reset."
      },
      {
        "number": "33",
        "name": "RX_DV/CLK125_EN",
        "type": "bidirectional",
        "description": "RGMII RX_CTL receive control output; latched as CLK125_EN during power-up/reset to enable the 125 MHz clock output when pulled up."
      },
      {
        "number": "34",
        "name": "DVDDH",
        "type": "power_in",
        "description": "3.3V, 2.5V, or 1.8V digital VDD for I/O."
      },
      {
        "number": "35",
        "name": "RX_CLK/PHYAD2",
        "type": "bidirectional",
        "description": "RGMII RXC receive reference clock output; its pull-up or pull-down is latched as PHYAD[2] during power-up/reset."
      },
      {
        "number": "36",
        "name": "MDC",
        "type": "input",
        "description": "Management data clock input and reference clock for MDIO; has an internal pull-up."
      },
      {
        "number": "37",
        "name": "MDIO",
        "type": "bidirectional",
        "description": "Management data input/output synchronous to MDC; requires an external pull-up to DVDDH of 1.0 kΩ to 4.7 kΩ."
      },
      {
        "number": "38",
        "name": "INT_N/PME_N2",
        "type": "output",
        "description": "Programmable interrupt output, active low by default (active high selectable via Register 1Fh bit 14), or PME_N2 wake-up output; requires an external pull-up to DVDDH of 1.0 kΩ to 4.7 kΩ and is not open-drain in all modes."
      },
      {
        "number": "39",
        "name": "DVDDL",
        "type": "power_in",
        "description": "1.2V digital VDD for the core."
      },
      {
        "number": "40",
        "name": "DVDDH",
        "type": "power_in",
        "description": "3.3V, 2.5V, or 1.8V digital VDD for I/O."
      },
      {
        "number": "41",
        "name": "CLK125_NDO/LED_MODE",
        "type": "bidirectional",
        "description": "125 MHz reference clock output for the MAC; its pull-up or pull-down is latched as LED_MODE during power-up/reset (pull-up selects single-LED mode, pull-down tri-color dual-LED mode)."
      },
      {
        "number": "42",
        "name": "RESET_N",
        "type": "input",
        "description": "Active-low chip reset with internal pull-up; hardware strap-ins are latched on its rising edge."
      },
      {
        "number": "43",
        "name": "LDO_O",
        "type": "output",
        "description": "On-chip 1.2V LDO controller output driving the gate of an external P-channel MOSFET; it must never be driven externally and may be left floating if 1.2V is supplied by the system."
      },
      {
        "number": "44",
        "name": "AVDDL_PLL",
        "type": "power_in",
        "description": "1.2V analog VDD for the PLL."
      },
      {
        "number": "45",
        "name": "XO",
        "type": "output",
        "description": "25 MHz crystal feedback; a no connect when an oscillator or external clock source is used."
      },
      {
        "number": "46",
        "name": "XI",
        "type": "input",
        "description": "Crystal, oscillator, or external clock input at 25 MHz ±50 ppm tolerance."
      },
      {
        "number": "47",
        "name": "NC",
        "type": "unconnected",
        "description": "Not bonded; may be connected to AVDDH power for footprint compatibility with the KSZ9021RN."
      },
      {
        "number": "48",
        "name": "ISET",
        "type": "bidirectional",
        "description": "Sets the transmit output level; connect a 12.1 kΩ 1% resistor to ground on this pin."
      },
      {
        "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: Package match: page 69 shows the 48-lead QFN 7x7 outline, and the revision history on page 75 states; The exposed paddle is printed as 'Paddle P_GND' with no numeric pin number in the datasheet. It is l; Pin 37 (MDIO) is 'Ipu/O' in the datasheet, meaning input with internal pull-up during reset and outp",
          "exposed pad 49 added from the footprint",
          "dropped thermal pad ['EP'] absent from footprint",
          "1/49 pins cited to the wrong page (name found elsewhere): ['45:XO@p11']"
        ],
        "pages_sent": 36,
        "cost_usd": 0.1782,
        "at": "2026-10-18T10:35:46"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588886747790905344",
        "pages": 79,
        "sha256": "5c4f83b0bd94536f",
        "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": "ksz9031rnxic.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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          7,
          0.77
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "f2b38b0b4bf967c77e683e8d4599608b9f0503055ec535b93c4ebb5d0163e916",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "ksz9031rnxic-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "c59487153dc1b27359fc874076d661bd2a11190930a512846e1573052a40f61f",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Microchip Tech",
      "Package": "QFN-48-EP(7x7)",
      "Category": "Interface",
      "Pins": "49"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "5c4f83b0bd94536fa7d36f863b0f9e5b69904103159340b2e8f2a4dd2a4e7a9e",
      "rows": [
        {
          "name": "Supply voltage DVDDL, AVDDL, AVDDL_PLL (absolute maximum)",
          "symbol": "VIN",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.5,
          "typ": null,
          "max": 1.8,
          "conditions": "",
          "source_page": 52,
          "source": "datasheet"
        },
        {
          "name": "Supply voltage AVDDH (absolute maximum)",
          "symbol": "VIN",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.5,
          "typ": null,
          "max": 5,
          "conditions": "",
          "source_page": 52,
          "source": "datasheet"
        },
        {
          "name": "Supply voltage DVDDH (absolute maximum)",
          "symbol": "VIN",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.5,
          "typ": null,
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          "conditions": "",
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          "source": "datasheet"
        },
        {
          "name": "Input voltage (all inputs)",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
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          "typ": null,
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          "conditions": "",
          "source_page": 52,
          "source": "datasheet"
        },
        {
          "name": "Output voltage (all outputs)",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.5,
          "typ": null,
          "max": 5,
          "conditions": "",
          "source_page": 52,
          "source": "datasheet"
        },
        {
          "name": "Lead temperature (soldering)",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 260,
          "conditions": "soldering, 10 s",
          "source_page": 52,
          "source": "datasheet"
        },
        {
          "name": "Storage temperature",
          "symbol": "TS",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -55,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 52,
          "source": "datasheet"
        },
        {
          "name": "Supply voltage DVDDL, AVDDL, AVDDL_PLL (operating)",
          "symbol": "VIN",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 1.14,
          "typ": null,
          "max": 1.38,
          "conditions": "1.2V core supply",
          "source_page": 52,
          "source": "datasheet"
        },
        {
          "name": "Supply voltage AVDDH @ 3.3V (operating)",
          "symbol": "VIN",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 3.135,
          "typ": null,
          "max": 3.465,
          "conditions": "AVDDH @ 3.3V",
          "source_page": 52,
          "source": "datasheet"
        },
        {
          "name": "Supply voltage DVDDH @ 3.3V (operating)",
          "symbol": "VIN",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 3.135,
          "typ": null,
          "max": 3.465,
          "conditions": "DVDDH @ 3.3V",
          "source_page": 52,
          "source": "datasheet"
        },
        {
          "name": "Supply voltage DVDDH @ 2.5V (operating)",
          "symbol": "VIN",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 2.375,
          "typ": null,
          "max": 2.625,
          "conditions": "DVDDH @ 2.5V",
          "source_page": 52,
          "source": "datasheet"
        },
        {
          "name": "Supply voltage DVDDH @ 1.8V (operating)",
          "symbol": "VIN",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 1.71,
          "typ": null,
          "max": 1.89,
          "conditions": "DVDDH @ 1.8V",
          "source_page": 52,
          "source": "datasheet"
        },
        {
          "name": "Ambient temperature (TA Industrial: KSZ9031RNXI)",
          "symbol": "TA",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 85,
          "conditions": "Industrial grade",
          "source_page": 52,
          "source": "datasheet"
        },
        {
          "name": "MDIO external pull-up resistor to DVDDH",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "kΩ",
          "min": 1,
          "typ": null,
          "max": 4.7,
          "conditions": "Pin 37 MDIO, pull-up to DVDDH",
          "source_page": 10,
          "source": "datasheet"
        },
        {
          "name": "INT_N/PME_N external pull-up resistor to DVDDH",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "kΩ",
          "min": 1,
          "typ": null,
          "max": 4.7,
          "conditions": "Pin 38, interrupt (active low) and PME functions, pull-up to DVDDH",
          "source_page": 10,
          "source": "datasheet"
        },
        {
          "name": "Reference clock frequency (XI)",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "MHz",
          "min": null,
          "typ": 25,
          "max": null,
          "conditions": "25 MHz crystal or external clock at XI",
          "source_page": 66,
          "source": "datasheet"
        },
        {
          "name": "Reference clock frequency tolerance (XI)",
          "symbol": "",
          "kind": "tolerance",
          "unit": "ppm",
          "min": -50,
          "typ": null,
          "max": 50,
          "conditions": "25 MHz reference, printed ±50 ppm",
          "source_page": 66,
          "source": "datasheet"
        },
        {
          "name": "XI clock input swing (direct coupled, minimum)",
          "symbol": "VPP",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 2.5,
          "typ": null,
          "max": null,
          "conditions": "Peak-to-peak swing reference to ground, external clock",
          "source_page": 66,
          "source": "datasheet"
        },
        {
          "name": "XI clock input swing (series capacitive coupled, minimum)",
          "symbol": "VPP",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 1.5,
          "typ": null,
          "max": null,
          "conditions": "With series capacitive coupling",
          "source_page": 66,
          "source": "datasheet"
        },
        {
          "name": "XI clock input swing (maximum)",
          "symbol": "VPP",
          "kind": "recommended_operating",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 3.3,
          "conditions": "Maximum VPP swing is 3.3V +5% per datasheet text",
          "source_page": 66,
          "source": "datasheet"
        },
        {
          "name": "Reference clock total period jitter",
          "symbol": "",
          "kind": "timing",
          "unit": "ps",
          "min": null,
          "typ": null,
          "max": 100,
          "conditions": "Total period jitter, peak-to-peak, 25 MHz reference",
          "source_page": 66,
          "source": "datasheet"
        },
        {
          "name": "Maximum junction temperature",
          "symbol": "TJ",
          "kind": "thermal",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 125,
          "conditions": "TJ max.",
          "source_page": 52,
          "source": "datasheet"
        },
        {
          "name": "Thermal resistance junction-to-ambient",
          "symbol": "ΘJA",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 36.34,
          "max": null,
          "conditions": "",
          "source_page": 52,
          "source": "datasheet"
        },
        {
          "name": "Thermal resistance junction-to-case",
          "symbol": "ΘJC",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 9.47,
          "max": null,
          "conditions": "",
          "source_page": 52,
          "source": "datasheet"
        }
      ]
    }
  },
  "variants": [],
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