KSZ8041TLI-TR

{
  "schema_version": 1,
  "type": "component",
  "slug": "ksz8041tli-tr",
  "title": "KSZ8041TLI-TR",
  "brief": "Microchip Tech Receivers & Transceivers, TQFP-48(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",
    "logic ics",
    "ksz8041tli-tr",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "KSZ8041TLI-TR",
    "manufacturer": "Microchip Tech",
    "package": "TQFP-48(7x7)",
    "pin_count": 48,
    "category": "Logic ICs",
    "subcategory": "Receivers & Transceivers",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/7ba7fec6fcb58d23b76def9fc3f39381.pdf",
    "parts": {
      "symbol": "ksz8041tli-tr.kicad_sym",
      "footprint": "ksz8041tli-tr.kicad_mod",
      "model_3d": "ksz8041tli-tr-hero.glb",
      "model_3d_plain": "ksz8041tli-tr-etched.glb",
      "model_3d_step": "ksz8041tli-tr-etched.step",
      "model_3d_step_plain": "ksz8041tli-tr.step",
      "lbr": "ksz8041tli-tr.lbr"
    },
    "distributor_links": {
      "lcsc": "C631638",
      "mouser": "998-KSZ8041TLITR"
    },
    "distributor_check": {
      "checked_at": "2026-10-23T18:08:19Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "deferred",
        "error": "shared DigiKey quota guard: 887 calls left today"
      },
      "mouser": {
        "pn": "998-KSZ8041TLITR",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "GND",
        "type": "power_in",
        "description": "Ground."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "Ground."
      },
      {
        "number": "3",
        "name": "GND",
        "type": "power_in",
        "description": "Ground."
      },
      {
        "number": "4",
        "name": "VDDA_1.8",
        "type": "power_in",
        "description": "1.8V analog VDD; connect to V1.8_OUT (pin 6) through a ferrite bead and decouple with 0.1 µF to ground."
      },
      {
        "number": "5",
        "name": "VDDA_1.8",
        "type": "power_in",
        "description": "1.8V analog VDD; connect to V1.8_OUT (pin 6) through a ferrite bead and decouple with 0.1 µF to ground."
      },
      {
        "number": "6",
        "name": "V1.8_OUT",
        "type": "power_out",
        "description": "1.8V output voltage from the chip's internal regulator; decouple with 1 µF and 0.1 µF capacitors to ground."
      },
      {
        "number": "7",
        "name": "VDDA_3.3",
        "type": "power_in",
        "description": "3.3V analog VDD; connect to the board's 3.3V supply through a ferrite bead and decouple with 22 µF and 0.1 µF to ground."
      },
      {
        "number": "8",
        "name": "VDDA_3.3",
        "type": "power_in",
        "description": "3.3V analog VDD; connect to the board's 3.3V supply through a ferrite bead and decouple with 22 µF and 0.1 µF to ground."
      },
      {
        "number": "9",
        "name": "RX–",
        "type": "bidirectional",
        "description": "Physical receive or transmit signal (- differential)."
      },
      {
        "number": "10",
        "name": "RX+",
        "type": "bidirectional",
        "description": "Physical receive or transmit signal (+ differential)."
      },
      {
        "number": "11",
        "name": "TX–",
        "type": "bidirectional",
        "description": "Physical transmit or receive signal (- differential)."
      },
      {
        "number": "12",
        "name": "TX+",
        "type": "bidirectional",
        "description": "Physical transmit or receive signal (+ differential)."
      },
      {
        "number": "13",
        "name": "GND",
        "type": "power_in",
        "description": "Ground."
      },
      {
        "number": "14",
        "name": "XO",
        "type": "output",
        "description": "Crystal feedback, used only in MII mode with a 25 MHz crystal; no connect if an oscillator or external clock is used, or in RMII or SMII mode."
      },
      {
        "number": "15",
        "name": "XI/REFCLK/CLOCK",
        "type": "input",
        "description": "Crystal/oscillator/external clock input: 25 MHz ±50 ppm in MII mode, 50 MHz ±50 ppm in RMII mode (oscillator or external clock only), 125 MHz ±100 ppm in SMII mode (oscillator or external clock only)."
      },
      {
        "number": "16",
        "name": "REXT",
        "type": "bidirectional",
        "description": "Sets the physical transmit output current; connect a 6.49 kΩ resistor in parallel with a 100 pF capacitor to ground."
      },
      {
        "number": "17",
        "name": "GND",
        "type": "power_in",
        "description": "Ground."
      },
      {
        "number": "18",
        "name": "MDIO",
        "type": "bidirectional",
        "description": "Management interface (MII) data I/O; requires an external 4.7 kΩ pull-up resistor."
      },
      {
        "number": "19",
        "name": "MDC",
        "type": "input",
        "description": "Management interface (MII) clock input, synchronous to the MDIO data interface."
      },
      {
        "number": "20",
        "name": "RXD3/PHYAD0",
        "type": "bidirectional",
        "description": "MII receive data output [3]; internal 40 kΩ ±30% pull-up at power-up/reset, and the level is latched as PHYADDR[0]."
      },
      {
        "number": "21",
        "name": "RXD2/PHYAD1",
        "type": "bidirectional",
        "description": "MII receive data output [2]; internal 40 kΩ ±30% pull-down at power-up/reset, and the level is latched as PHYADDR[1]."
      },
      {
        "number": "22",
        "name": "RXD1/RXD[1]/PHYAD2",
        "type": "bidirectional",
        "description": "MII/RMII receive data output [1]; internal 40 kΩ ±30% pull-down at power-up/reset, and the level is latched as PHYADDR[2]."
      },
      {
        "number": "23",
        "name": "RXD0/RXD[0]/RX/DUPLEX",
        "type": "bidirectional",
        "description": "MII/RMII receive data output [0] or SMII receive data and control; internal 40 kΩ ±30% pull-up at power-up/reset, latched as DUPLEX (register 0h bit 8; pull-up = half-duplex default, pull-down = full-duplex)."
      },
      {
        "number": "24",
        "name": "GND",
        "type": "power_in",
        "description": "Ground."
      },
      {
        "number": "25",
        "name": "VDDIO_3.3",
        "type": "power_in",
        "description": "3.3V digital VDD; connect to the board's 3.3V supply and decouple with 22 µF and 0.1 µF to ground."
      },
      {
        "number": "26",
        "name": "VDDIO_3.3",
        "type": "power_in",
        "description": "3.3V digital VDD; connect to the board's 3.3V supply and decouple with 22 µF and 0.1 µF to ground."
      },
      {
        "number": "27",
        "name": "RXDV/CRSDV/CONFIG2",
        "type": "bidirectional",
        "description": "MII receive data valid output or RMII carrier sense/receive data valid output; internal pull-down at power-up/reset, latched as CONFIG2."
      },
      {
        "number": "28",
        "name": "RXC",
        "type": "output",
        "description": "MII mode receive clock output."
      },
      {
        "number": "29",
        "name": "RXER/RX_ER/ISO",
        "type": "bidirectional",
        "description": "MII/RMII receive error output; internal pull-down at power-up/reset, latched as ISOLATE (pull-up = enable, pull-down default = disable)."
      },
      {
        "number": "30",
        "name": "GND",
        "type": "power_in",
        "description": "Ground."
      },
      {
        "number": "31",
        "name": "VDD_1.8",
        "type": "power_in",
        "description": "1.8V digital VDD; connect to V1.8_OUT (pin 6) through a ferrite bead and decouple with 0.1 µF to ground."
      },
      {
        "number": "32",
        "name": "INTRP",
        "type": "output",
        "description": "Programmable interrupt output with internal 40 kΩ ±30% pull-up; register 1Bh sets conditions and status, and register 1Fh bit 9 selects active-low (default) or active-high."
      },
      {
        "number": "33",
        "name": "TXC",
        "type": "bidirectional",
        "description": "MII mode transmit clock output; transmit clock input in MII back-to-back mode."
      },
      {
        "number": "34",
        "name": "TXEN/TX_EN",
        "type": "input",
        "description": "MII/RMII transmit enable input."
      },
      {
        "number": "35",
        "name": "TXD0/TXD[0]/TX",
        "type": "input",
        "description": "MII/RMII transmit data input [0], or SMII transmit data and control."
      },
      {
        "number": "36",
        "name": "TXD1/TXD[1]/SYNC",
        "type": "input",
        "description": "MII/RMII transmit data input [1], or SMII SYNC clock input."
      },
      {
        "number": "37",
        "name": "GND",
        "type": "power_in",
        "description": "Ground."
      },
      {
        "number": "38",
        "name": "TXD2",
        "type": "input",
        "description": "MII mode transmit data input [2]."
      },
      {
        "number": "39",
        "name": "TXD3",
        "type": "input",
        "description": "MII mode transmit data input [3]."
      },
      {
        "number": "40",
        "name": "COL/CONFIG0",
        "type": "bidirectional",
        "description": "MII collision detect output; internal pull-down at power-up/reset, latched as CONFIG0."
      },
      {
        "number": "41",
        "name": "CRS/CONFIG1",
        "type": "bidirectional",
        "description": "MII carrier sense output; internal pull-down at power-up/reset, latched as CONFIG1."
      },
      {
        "number": "42",
        "name": "LED0/NWAYEN",
        "type": "bidirectional",
        "description": "Programmable LED0 output (register 1Eh bits [15:14]; low = link on); internal pull-up at power-up/reset, latched as Auto-Negotiation Enable (register 0h bit 12; pull-up default = enable)."
      },
      {
        "number": "43",
        "name": "LED1/SPEED",
        "type": "bidirectional",
        "description": "Programmable LED1 output (register 1Eh bits [15:14]); internal pull-up at power-up/reset, latched as SPEED (register 0h bit 13; pull-up default = 100 Mbps, pull-down = 10 Mbps)."
      },
      {
        "number": "44",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect."
      },
      {
        "number": "45",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect."
      },
      {
        "number": "46",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect."
      },
      {
        "number": "47",
        "name": "RST#",
        "type": "input",
        "description": "Chip reset, active-low."
      },
      {
        "number": "48",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect (KSZ8041TL; this pin is FXSD/FXEN only on the KSZ8041FTL)."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-sonnet-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The ordering suffix TLI-TR is not decoded in the provided text. I assumed it is the KSZ8041TL (48-pi; REXT is listed as I/O in the datasheet. It is a resistor-programmed current-set pin, so it may fit '; The datasheet lists V1.8_OUT as type P (power). I mapped it to power_out because the description say"
        ],
        "pages_sent": 32,
        "cost_usd": 0.3007,
        "at": "2026-10-23T18:07:48"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/7ba7fec6fcb58d23b76def9fc3f39381.pdf",
        "pages": 63,
        "sha256": "d048624f52ddf06f",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 48,
        "described": 48,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "ksz8041tli-tr.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          9,
          9,
          1.1
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "14ca7676e4932e92f0eca0c6d56ce3018cd28a2531204a70ab7bbacb3eeb3cf5",
        "checked": "2026-10-23",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "ksz8041tli-tr-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          9,
          9,
          1.1
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "2b119344bd216d9c45d620c7e39976fcad4ca52488c039df23aae3ea2a8698df",
        "checked": "2026-10-23",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Microchip Tech",
      "Package": "TQFP-48(7x7)",
      "Category": "Logic ICs",
      "Pins": "48"
    },
    "appearance": {
      "contacts": {
        "quote": "If copper mode (FXEN=0), pin strap-in is SPEED mode.",
        "page": 13,
        "doc": "ds.pdf",
        "material": "copper"
      },
      "version": 1,
      "datasheet_sha256": "d048624f52ddf06f19fbb6e3204b616db5863f021e95553f9033c7fa7545c7d2"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "d048624f52ddf06f19fbb6e3204b616db5863f021e95553f9033c7fa7545c7d2",
      "rows": [
        {
          "name": "Supply Voltage (VDD_1.8, VDDA_1.8, V1.8_OUT)",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.5,
          "typ": null,
          "max": 2.4,
          "conditions": "",
          "source_page": 42,
          "source": "datasheet"
        },
        {
          "name": "Supply Voltage (VDDIO_3.3, VDDA_3.3)",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.5,
          "typ": null,
          "max": 4,
          "conditions": "",
          "source_page": 42,
          "source": "datasheet"
        },
        {
          "name": "Input Voltage (All Inputs)",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.5,
          "typ": null,
          "max": 4,
          "conditions": "",
          "source_page": 42,
          "source": "datasheet"
        },
        {
          "name": "Output Voltage (All Outputs)",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.5,
          "typ": null,
          "max": 4,
          "conditions": "",
          "source_page": 42,
          "source": "datasheet"
        },
        {
          "name": "Lead Temperature",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 260,
          "conditions": "soldering, 10s",
          "source_page": 42,
          "source": "datasheet"
        },
        {
          "name": "Storage Temperature",
          "symbol": "TS",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -55,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 42,
          "source": "datasheet"
        },
        {
          "name": "Supply Voltage (VDDIO_3.3, VDDA_3.3)",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 3.135,
          "typ": null,
          "max": 3.465,
          "conditions": "Operating ratings",
          "source_page": 42,
          "source": "datasheet"
        },
        {
          "name": "Ambient Operating Temperature (Industrial)",
          "symbol": "TA",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 85,
          "conditions": "Industrial",
          "source_page": 42,
          "source": "datasheet"
        },
        {
          "name": "Ambient Operating Temperature (Commercial)",
          "symbol": "TA",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": 0,
          "typ": null,
          "max": 70,
          "conditions": "Commercial",
          "source_page": 42,
          "source": "datasheet"
        },
        {
          "name": "Maximum Junction Temperature",
          "symbol": "TJ",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 125,
          "conditions": "",
          "source_page": 42,
          "source": "datasheet"
        },
        {
          "name": "Thermal Resistance Junction-to-Ambient",
          "symbol": "ΘJA",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 69.64,
          "max": null,
          "conditions": "",
          "source_page": 42,
          "source": "datasheet"
        },
        {
          "name": "Thermal Resistance Junction-to-Case",
          "symbol": "ΘJC",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 15,
          "max": null,
          "conditions": "",
          "source_page": 42,
          "source": "datasheet"
        },
        {
          "name": "Supply Current 100BASE-TX",
          "symbol": "IDD1",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 53,
          "max": 58.3,
          "conditions": "Chip only (no transformer); Full-duplex traffic @ 100% utilization",
          "source_page": 43,
          "source": "datasheet"
        },
        {
          "name": "Supply Current 10BASE-T",
          "symbol": "IDD2",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 38,
          "max": 41.8,
          "conditions": "Chip only (no transformer); Full-duplex traffic @ 100% utilization",
          "source_page": 43,
          "source": "datasheet"
        },
        {
          "name": "Supply Current Power Saving Mode",
          "symbol": "IDD3",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 32,
          "max": 35.2,
          "conditions": "Ethernet cable disconnected (reg. 1F.10 = 1)",
          "source_page": 43,
          "source": "datasheet"
        },
        {
          "name": "Supply Current Power Down Mode",
          "symbol": "IDD4",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 4,
          "max": 4.4,
          "conditions": "Software power down (reg. 0.11 = 1)",
          "source_page": 43,
          "source": "datasheet"
        },
        {
          "name": "Input High Voltage",
          "symbol": "VIH",
          "kind": "electrical",
          "unit": "V",
          "min": 2,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 43,
          "source": "datasheet"
        },
        {
          "name": "Input Low Voltage",
          "symbol": "VIL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.8,
          "conditions": "",
          "source_page": 43,
          "source": "datasheet"
        },
        {
          "name": "Input Current",
          "symbol": "IIN",
          "kind": "electrical",
          "unit": "µA",
          "min": -10,
          "typ": null,
          "max": 10,
          "conditions": "VIN = GND ~ VDDIO",
          "source_page": 43,
          "source": "datasheet"
        },
        {
          "name": "Output High Voltage",
          "symbol": "VOH",
          "kind": "electrical",
          "unit": "V",
          "min": 2.4,
          "typ": null,
          "max": null,
          "conditions": "IOH = –4 mA",
          "source_page": 43,
          "source": "datasheet"
        },
        {
          "name": "Output Low Voltage",
          "symbol": "VOL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.4,
          "conditions": "IOL = 4 mA",
          "source_page": 43,
          "source": "datasheet"
        },
        {
          "name": "Output Tri-State Leakage",
          "symbol": "|IOZ|",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": null,
          "max": 10,
          "conditions": "",
          "source_page": 43,
          "source": "datasheet"
        },
        {
          "name": "100BASE-TX Peak Differential Output Voltage",
          "symbol": "VO",
          "kind": "electrical",
          "unit": "V",
          "min": 0.95,
          "typ": null,
          "max": 1.05,
          "conditions": "100Ω termination across differential output",
          "source_page": 43,
          "source": "datasheet"
        },
        {
          "name": "100BASE-TX Output Voltage Imbalance",
          "symbol": "VIMB",
          "kind": "electrical",
          "unit": "%",
          "min": null,
          "typ": null,
          "max": 2,
          "conditions": "100Ω termination across differential output",
          "source_page": 43,
          "source": "datasheet"
        },
        {
          "name": "100BASE-TX Rise/Fall Time",
          "symbol": "tr/tf",
          "kind": "electrical",
          "unit": "ns",
          "min": 3,
          "typ": null,
          "max": 5,
          "conditions": "",
          "source_page": 43,
          "source": "datasheet"
        },
        {
          "name": "100BASE-TX Rise/Fall Time Imbalance",
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