KSZ9131RNXC-TR

{
  "slug": "ksz9131rnxc-tr",
  "version": "0.1.0",
  "type": "component",
  "description": "Microchip Tech Buffer/Driver/Transceiver, QFN-48(7x7). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "logic ics",
    "ksz9131rnxc-tr",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "ksz9131rnxc-tr.kicad_sym",
    "ksz9131rnxc-tr.kicad_mod",
    "ksz9131rnxc-tr.glb",
    "ksz9131rnxc-tr.step",
    "ksz9131rnxc-tr.lbr",
    "docs/hero.png",
    "docs/ksz9131rnxc-tr-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "ksz9131rnxc-tr-hero.glb",
    "ksz9131rnxc-tr-hero.overlay.json",
    "ksz9131rnxc-tr-etched.glb"
  ],
  "component": {
    "mpn": "KSZ9131RNXC-TR",
    "manufacturer": "Microchip Tech",
    "package": "QFN-48(7x7)",
    "pin_count": 49,
    "category": "Logic ICs",
    "subcategory": "Buffer/Driver/Transceiver",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/9169b3442da760957de145e016408aa0.pdf",
    "parts": {
      "symbol": "ksz9131rnxc-tr.kicad_sym",
      "footprint": "ksz9131rnxc-tr.kicad_mod",
      "model_3d": "ksz9131rnxc-tr-hero.glb",
      "model_3d_plain": "ksz9131rnxc-tr-etched.glb",
      "model_3d_step": "ksz9131rnxc-tr-etched.step",
      "model_3d_step_plain": "ksz9131rnxc-tr.step",
      "lbr": "ksz9131rnxc-tr.lbr"
    },
    "distributor_links": {
      "lcsc": "C1849397",
      "digikey": "150-KSZ9131RNXC-TR-ND",
      "mouser": "579-KSZ9131RNXC-TR"
    },
    "distributor_check": {
      "checked_at": "2026-10-27T00:44:26Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "150-KSZ9131RNXC-TR-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "579-KSZ9131RNXC-TR",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "AVDDH",
        "type": "power_in",
        "description": "+2.5/3.3V analog power supply for the transceiver (Automotive Grade 2 requires +2.5V)."
      },
      {
        "number": "2",
        "name": "TXRXP_A",
        "type": "bidirectional",
        "description": "Media Dependent Interface pair A positive signal; BI_DA+ in 1000BASE-T and TX+/RX+ in 10/100 MDI/MDI-X modes."
      },
      {
        "number": "3",
        "name": "TXRXM_A",
        "type": "bidirectional",
        "description": "Media Dependent Interface pair A negative signal; BI_DA- in 1000BASE-T and TX-/RX- in 10/100 MDI/MDI-X modes."
      },
      {
        "number": "4",
        "name": "AVDDL",
        "type": "power_in",
        "description": "+1.2V analog power supply for the transceiver core."
      },
      {
        "number": "5",
        "name": "TXRXP_B",
        "type": "bidirectional",
        "description": "Media Dependent Interface pair B positive signal; BI_DB+ in 1000BASE-T and RX+/TX+ in 10/100 modes."
      },
      {
        "number": "6",
        "name": "TXRXM_B",
        "type": "bidirectional",
        "description": "Media Dependent Interface pair B negative signal; BI_DB- in 1000BASE-T and RX-/TX- in 10/100 modes."
      },
      {
        "number": "7",
        "name": "TXRXP_C",
        "type": "bidirectional",
        "description": "Media Dependent Interface pair C positive signal; BI_DC+ in 1000BASE-T and not used in 10/100 modes."
      },
      {
        "number": "8",
        "name": "TXRXM_C",
        "type": "bidirectional",
        "description": "Media Dependent Interface pair C negative signal; BI_DC- in 1000BASE-T and not used in 10/100 modes."
      },
      {
        "number": "9",
        "name": "AVDDL",
        "type": "power_in",
        "description": "+1.2V analog power supply for the transceiver core."
      },
      {
        "number": "10",
        "name": "TXRXP_D",
        "type": "bidirectional",
        "description": "Media Dependent Interface pair D positive signal; BI_DD+ in 1000BASE-T and not used in 10/100 modes."
      },
      {
        "number": "11",
        "name": "TXRXM_D",
        "type": "bidirectional",
        "description": "Media Dependent Interface pair D negative signal; BI_DD- in 1000BASE-T and not used in 10/100 modes."
      },
      {
        "number": "12",
        "name": "AVDDH",
        "type": "power_in",
        "description": "+2.5/3.3V analog power supply for the transceiver."
      },
      {
        "number": "13",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect; not bonded internally and may be connected to ground for footprint compatibility with older devices."
      },
      {
        "number": "14",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect; not bonded internally and may be connected to DVDDL for footprint compatibility with older devices."
      },
      {
        "number": "15",
        "name": "LED2/PHYAD1",
        "type": "bidirectional",
        "description": "Programmable LED2 output (VO8) that doubles as PHY address strap PHYAD1, sampled at power-up/reset (pulled-up = 1, pulled-down = 0)."
      },
      {
        "number": "16",
        "name": "DVDDH",
        "type": "power_in",
        "description": "+3.3/2.5/1.8V variable I/O digital power supply (Automotive Grade 2 requires +1.8V or +2.5V)."
      },
      {
        "number": "17",
        "name": "LED1/PME_N1/PHYAD0",
        "type": "bidirectional",
        "description": "Programmable LED1 output (VO8), also PME_N1 wake-on-LAN output and PHY address strap PHYAD0 sampled at reset."
      },
      {
        "number": "18",
        "name": "DVDDL",
        "type": "power_in",
        "description": "+1.2V digital core power supply input."
      },
      {
        "number": "19",
        "name": "TXD0",
        "type": "input",
        "description": "RGMII transmit data bit 0 from the MAC into the PHY (variable voltage input, DVDDH I/O level)."
      },
      {
        "number": "20",
        "name": "TXD1",
        "type": "input",
        "description": "RGMII transmit data bit 1 from the MAC into the PHY (variable voltage input, DVDDH I/O level)."
      },
      {
        "number": "21",
        "name": "TXD2",
        "type": "input",
        "description": "RGMII transmit data bit 2 from the MAC into the PHY (variable voltage input, DVDDH I/O level)."
      },
      {
        "number": "22",
        "name": "TXD3",
        "type": "input",
        "description": "RGMII transmit data bit 3 from the MAC into the PHY (variable voltage input, DVDDH I/O level)."
      },
      {
        "number": "23",
        "name": "DVDDL",
        "type": "power_in",
        "description": "+1.2V digital core power supply input."
      },
      {
        "number": "24",
        "name": "TXC",
        "type": "input",
        "description": "RGMII transmit reference clock from the MAC used to latch TX data; 125 MHz for 1000BASE-T, 25 MHz for 100BASE-TX, 2.5 MHz for 10BASE-T."
      },
      {
        "number": "25",
        "name": "TX_CTL",
        "type": "input",
        "description": "RGMII transmit control combining TX enable (TXEN) and transmit error (TXER) per the RGMII specification."
      },
      {
        "number": "26",
        "name": "DVDDL",
        "type": "power_in",
        "description": "+1.2V digital core power supply input."
      },
      {
        "number": "27",
        "name": "RXD3/MODE3",
        "type": "bidirectional",
        "description": "RGMII receive data bit 3 to the MAC (VO24), also MODE3 device-mode strap sampled at reset."
      },
      {
        "number": "28",
        "name": "RXD2/MODE2",
        "type": "bidirectional",
        "description": "RGMII receive data bit 2 to the MAC (VO24), also MODE2 device-mode strap sampled at reset."
      },
      {
        "number": "29",
        "name": "VSS",
        "type": "power_in",
        "description": "Digital ground for the device."
      },
      {
        "number": "30",
        "name": "DVDDL",
        "type": "power_in",
        "description": "+1.2V digital core power supply input."
      },
      {
        "number": "31",
        "name": "RXD1/MODE1",
        "type": "bidirectional",
        "description": "RGMII receive data bit 1 to the MAC (VO24), also MODE1 device-mode strap sampled at reset."
      },
      {
        "number": "32",
        "name": "RXD0/MODE0",
        "type": "bidirectional",
        "description": "RGMII receive data bit 0 to the MAC (VO24), also MODE0 device-mode strap sampled at reset."
      },
      {
        "number": "33",
        "name": "RX_CTL/CLK125_EN",
        "type": "bidirectional",
        "description": "RGMII receive control to the MAC (VO24, receive data valid and receive error); also CLK125_EN strap that enables the 125 MHz clock output when pulled up."
      },
      {
        "number": "34",
        "name": "DVDDH",
        "type": "power_in",
        "description": "+3.3/2.5/1.8V variable I/O digital power supply."
      },
      {
        "number": "35",
        "name": "RXC/PHYAD2",
        "type": "bidirectional",
        "description": "RGMII receive reference clock to the MAC (VO24; 125/25/2.5 MHz), also PHYAD2 strap sampled at reset."
      },
      {
        "number": "36",
        "name": "MDC",
        "type": "input",
        "description": "Management clock input from the MAC for the MDC/MDIO management interface (Schmitt input with internal pull-up)."
      },
      {
        "number": "37",
        "name": "MDIO",
        "type": "bidirectional",
        "description": "Management data to and from the MAC; requires an external pull-up to DVDDH in the range 1.0 kOhm to 4.7 kOhm; open-drain or push-pull per MDIO Drive register."
      },
      {
        "number": "38",
        "name": "INT_N/PME_N2/ALLPHYAD",
        "type": "bidirectional",
        "description": "Programmable active-low PHY interrupt output (VO8), also PME_N2 wake-on-LAN output and ALLPHYAD strap sampled at reset."
      },
      {
        "number": "39",
        "name": "DVDDL",
        "type": "power_in",
        "description": "+1.2V digital core power supply input."
      },
      {
        "number": "40",
        "name": "DVDDH",
        "type": "power_in",
        "description": "+3.3/2.5/1.8V variable I/O digital power supply."
      },
      {
        "number": "41",
        "name": "CLK125_NDO/LED_MODE",
        "type": "bidirectional",
        "description": "125 MHz reference clock output (VO24) for the MAC or NAND tree output, also LED_MODE strap sampled at reset (pulled-up = Individual-LED, pulled-down = Tri-color-LED)."
      },
      {
        "number": "42",
        "name": "RESET_N",
        "type": "input",
        "description": "Chip reset, active low (Schmitt input with internal pull-up); configuration straps are latched on its rising edge."
      },
      {
        "number": "43",
        "name": "LDO_O",
        "type": "output",
        "description": "On-chip 1.2V LDO controller output that drives the gate of an external P-channel MOSFET for the core; leave unconnected if 1.2V is supplied externally."
      },
      {
        "number": "44",
        "name": "AVDDL_PLL",
        "type": "power_in",
        "description": "+1.2V analog PLL power supply."
      },
      {
        "number": "45",
        "name": "XO",
        "type": "output",
        "description": "Crystal output for a 25 MHz crystal lead; left unconnected when an external oscillator is used."
      },
      {
        "number": "46",
        "name": "XI",
        "type": "input",
        "description": "Crystal input for a 25 MHz crystal or clock source input from an oscillator; crystal or oscillator tolerance should be +/-50 ppm."
      },
      {
        "number": "47",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect; not bonded internally and may be connected to AVDDH for footprint compatibility with older devices."
      },
      {
        "number": "48",
        "name": "ISET",
        "type": "passive",
        "description": "PHY bias resistor pin; connect to ground through a 6.04 kOhm 1% resistor."
      },
      {
        "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 MPN suffix RNXC is not listed in the datasheet. It covers KSZ9131RNX in 48-pin RoHS QFN (7x7 mm); The exposed pad (P_VSS) on the bottom of the package has no numbered pin; it must be connected to gr; Pin 47 is not bonded and may be connected to AVDDH for footprint compatibility; pins 13 and 14 are n",
          "20/49 pins cited to the wrong page (name found elsewhere): ['9:AVDDL@p15', '17:LED1/PME_N1/PHYAD0@p13', '18:DVDDL@p15', '23:DVDDL@p15']"
        ],
        "pages_sent": 46,
        "cost_usd": 0.0699,
        "at": "2026-10-27T00:43:52"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/9169b3442da760957de145e016408aa0.pdf",
        "pages": 149,
        "sha256": "162ab5b03c292354",
        "source_tier": "mfr"
      },
      "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": "ksz9131rnxc-tr.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          7.0,
          7.0,
          0.77
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "f2b38b0b4bf967c77e683e8d4599608b9f0503055ec535b93c4ebb5d0163e916",
        "checked": "2026-10-27",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "ksz9131rnxc-tr-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          7.0,
          7.0,
          0.77
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "27d37b42949f36630595ab287f572c5f193df8003386878f00af6b36e055b943",
        "checked": "2026-10-27",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}