KSZ8041TL

{
  "schema_version": 1,
  "type": "component",
  "slug": "ksz8041tl",
  "title": "KSZ8041TL",
  "brief": "Microchip Tech Buffers / Drivers, 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",
    "ksz8041tl",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "KSZ8041TL",
    "manufacturer": "Microchip Tech",
    "package": "TQFP-48(7x7)",
    "pin_count": 48,
    "category": "Logic ICs",
    "subcategory": "Buffers / Drivers",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/6904c08b6dd4963bd71c9d7fd92450ff.pdf",
    "parts": {
      "symbol": "ksz8041tl.kicad_sym",
      "footprint": "ksz8041tl.kicad_mod",
      "model_3d": "ksz8041tl-hero.glb",
      "model_3d_plain": "ksz8041tl-etched.glb",
      "model_3d_step": "ksz8041tl-etched.step",
      "model_3d_step_plain": "ksz8041tl.step",
      "lbr": "ksz8041tl.lbr"
    },
    "distributor_links": {
      "lcsc": "C633706"
    },
    "distributor_check": {
      "checked_at": "2026-10-27T09:35:15Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "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 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 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 3.3V supply through ferrite bead, decoupled 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 3.3V supply through ferrite bead, decoupled 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/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, 50 MHz ±50 ppm in RMII, 125 MHz ±100 ppm in SMII."
      },
      {
        "number": "16",
        "name": "REXT",
        "type": "bidirectional",
        "description": "Sets 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 pull-up value is latched as PHYADDR[0] at power-up/reset."
      },
      {
        "number": "21",
        "name": "RXD2/PHYAD1",
        "type": "bidirectional",
        "description": "MII receive data output [2]; internal pull-down value is latched as PHYADDR[1] at power-up/reset."
      },
      {
        "number": "22",
        "name": "RXD1/RXD[1]/PHYAD2",
        "type": "bidirectional",
        "description": "MII/RMII receive data output [1]; internal pull-down value is latched as PHYADDR[2] at power-up/reset."
      },
      {
        "number": "23",
        "name": "RXD0/RXD[0]/RX/DUPLEX",
        "type": "bidirectional",
        "description": "MII/RMII receive data output [0] or SMII receive data and control; latched as DUPLEX (register 0h bit 8) at power-up/reset, pull-up default half-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 board 3.3V supply, decoupled 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 board 3.3V supply, decoupled with 22 µF and 0.1 µF to ground."
      },
      {
        "number": "27",
        "name": "RXDV/CRSDV/CONFIG2",
        "type": "bidirectional",
        "description": "MII receive data valid or RMII carrier sense/receive data valid output; pull value latched as CONFIG2 at power-up/reset."
      },
      {
        "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; pull value latched as ISOLATE (register 0h bit 10) at power-up/reset, pull-up enables, default pull-down disables."
      },
      {
        "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 ferrite bead and decouple with 0.1 µF to ground."
      },
      {
        "number": "32",
        "name": "INTRP",
        "type": "output",
        "description": "Programmable interrupt output with internal pull-up; register 1Bh sets conditions 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; pull-down value latched as CONFIG0 at power-up/reset."
      },
      {
        "number": "41",
        "name": "CRS/CONFIG1",
        "type": "bidirectional",
        "description": "MII carrier sense output; pull-down value latched as CONFIG1 at power-up/reset."
      },
      {
        "number": "42",
        "name": "LED0/NWAYEN",
        "type": "bidirectional",
        "description": "Programmable LED0 output (register 1Eh bits [15:14]); latched as Auto-Negotiation Enable (register 0h bit 12) at power-up/reset, pull-up default enables."
      },
      {
        "number": "43",
        "name": "LED1/SPEED",
        "type": "bidirectional",
        "description": "Programmable LED1 output (register 1Eh bits [15:14]); latched as SPEED (register 0h bit 13) at power-up/reset, pull-up default 100 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)."
      }
    ],
    "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 datasheet text gives no explicit pin-type for the strap-in pins, and the description of REXT as ; The package is stated as 48-pin TQFP for KSZ8041TL. The 7x7 body size is not stated in the supplied "
        ],
        "pages_sent": 32,
        "cost_usd": 0.2885,
        "at": "2026-10-27T09:34:48"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/6904c08b6dd4963bd71c9d7fd92450ff.pdf",
        "pages": 63,
        "sha256": "67c033164b54cf7e",
        "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": "ksz8041tl.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": "2026-10-27",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "ksz8041tl-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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          9,
          1.1
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "e8014f58d7d62f2c67cff4c1028ec0f0d1a1c40d0b743f11d2b0dfe3eefd4f26",
        "checked": "2026-10-27",
        "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": "67c033164b54cf7e91eeb439b3607d7f691d66648461d489600aa44c93170117"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "67c033164b54cf7e91eeb439b3607d7f691d66648461d489600aa44c93170117",
      "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 (Commercial)",
          "symbol": "TA",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": 0,
          "typ": null,
          "max": 70,
          "conditions": "Commercial",
          "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": "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": "LED Output Drive Current",
          "symbol": "ILED",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 8,
          "max": null,
          "conditions": "Each LED pin (LED0, LED1)",
          "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",
          "symbol": "",
          "kind": "electrical",
          "unit": "ns",
          "min": 0,
          "typ": null,
          "max": 0.5,
          "conditions": "",
          "source_page": 43,
          "source": "datasheet"
        },
        {
          "name": "100BASE-TX Duty Cycle Distortion",
          "symbol": "",
          "kind": "electrical",
          "unit": "ns",
          "min": null,
          "typ": null,
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