KSZ8873MLL

{
  "slug": "ksz8873mll",
  "version": "0.1.0",
  "type": "component",
  "description": "Microchip Tech Interface - Specialized, LQFP-64(10x10). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "communication interface chip-uart-485-232",
    "ksz8873mll",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "ksz8873mll.kicad_sym",
    "ksz8873mll.kicad_mod",
    "ksz8873mll.glb",
    "ksz8873mll.step",
    "ksz8873mll.lbr",
    "docs/hero.png",
    "docs/ksz8873mll-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "ksz8873mll-hero.glb",
    "ksz8873mll-hero.overlay.json",
    "ksz8873mll-etched.glb"
  ],
  "component": {
    "mpn": "KSZ8873MLL",
    "manufacturer": "Microchip Tech",
    "package": "LQFP-64(10x10)",
    "pin_count": 64,
    "category": "Communication Interface Chip/UART/485/232",
    "subcategory": "Interface - Specialized",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/d57f2e7e007056824e1ee208c01684de.pdf",
    "parts": {
      "symbol": "ksz8873mll.kicad_sym",
      "footprint": "ksz8873mll.kicad_mod",
      "model_3d": "ksz8873mll-hero.glb",
      "model_3d_plain": "ksz8873mll-etched.glb",
      "model_3d_step": "ksz8873mll-etched.step",
      "model_3d_step_plain": "ksz8873mll.step",
      "lbr": "ksz8873mll.lbr"
    },
    "distributor_links": {
      "lcsc": "C634215",
      "digikey": "576-3459-ND",
      "mouser": "998-KSZ8873MLL"
    },
    "distributor_check": {
      "checked_at": "2026-10-28T16:31:10Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "576-3459-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "998-KSZ8873MLL",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "RXM1",
        "type": "bidirectional",
        "description": "Physical receive or transmit signal (negative differential) for port 1."
      },
      {
        "number": "2",
        "name": "RXP1",
        "type": "bidirectional",
        "description": "Physical receive or transmit signal (positive differential) for port 1."
      },
      {
        "number": "3",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground."
      },
      {
        "number": "4",
        "name": "TXM1",
        "type": "bidirectional",
        "description": "Physical transmit or receive signal (negative differential) for port 1."
      },
      {
        "number": "5",
        "name": "TXP1",
        "type": "bidirectional",
        "description": "Physical transmit or receive signal (positive differential) for port 1."
      },
      {
        "number": "6",
        "name": "VDDA_3.3",
        "type": "power_in",
        "description": "3.3V analog VDD for the transceiver."
      },
      {
        "number": "7",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground."
      },
      {
        "number": "8",
        "name": "ISET",
        "type": "output",
        "description": "Sets the physical transmit output current; pull down with an 11.8 kohm 1% resistor to ground."
      },
      {
        "number": "9",
        "name": "VDDA_1.8",
        "type": "power_in",
        "description": "1.8V analog core power input from VDDCO (pin 56)."
      },
      {
        "number": "10",
        "name": "RXM2",
        "type": "bidirectional",
        "description": "Physical receive or transmit signal (negative differential) for port 2."
      },
      {
        "number": "11",
        "name": "RXP2",
        "type": "bidirectional",
        "description": "Physical receive or transmit signal (positive differential) for port 2."
      },
      {
        "number": "12",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground."
      },
      {
        "number": "13",
        "name": "TXM2",
        "type": "bidirectional",
        "description": "Physical transmit or receive signal (negative differential) for port 2."
      },
      {
        "number": "14",
        "name": "TXP2",
        "type": "bidirectional",
        "description": "Physical transmit or receive signal (positive differential) for port 2."
      },
      {
        "number": "15",
        "name": "FXSD2",
        "type": "input",
        "description": "MLL/RLL: connect to analog ground by pull-down resistor; FLL: fiber signal detect / factory test pin."
      },
      {
        "number": "16",
        "name": "PWRDN",
        "type": "input",
        "description": "Chip power-down input, active-low, with internal pull-up."
      },
      {
        "number": "17",
        "name": "X1",
        "type": "input",
        "description": "25 MHz or 50 MHz crystal/oscillator clock input; clock is +/-50 ppm and must be applied before reset voltage goes high."
      },
      {
        "number": "18",
        "name": "X2",
        "type": "output",
        "description": "Crystal connection for X1; NC when an oscillator drives X1."
      },
      {
        "number": "19",
        "name": "SMTXEN3",
        "type": "input",
        "description": "Switch MII transmit enable for port 3, with internal pull-up."
      },
      {
        "number": "20",
        "name": "SMTXD33/EN_REFCLKO_3",
        "type": "input",
        "description": "MLL/FLL: switch MII transmit data bit 3; RLL: strap for RMII REFCLKO_3 output enable (pull-up enables, pull-down disables)."
      },
      {
        "number": "21",
        "name": "SMTXD32/NC",
        "type": "input",
        "description": "MLL/FLL: switch MII transmit data bit 2 with internal pull-up; RLL: no connection."
      },
      {
        "number": "22",
        "name": "SMTXD31",
        "type": "input",
        "description": "Switch MII/RMII transmit data bit 1, with internal pull-up."
      },
      {
        "number": "23",
        "name": "SMTXD30",
        "type": "input",
        "description": "Switch MII/RMII transmit data bit 0, with internal pull-up."
      },
      {
        "number": "24",
        "name": "GND",
        "type": "power_in",
        "description": "Digital ground."
      },
      {
        "number": "25",
        "name": "VDDIO",
        "type": "power_in",
        "description": "3.3V, 2.5V, or 1.8V digital IO supply input; requires well-decoupled capacitors."
      },
      {
        "number": "26",
        "name": "SMTXC3/REFCLKI_3",
        "type": "bidirectional",
        "description": "MII transmit clock (output in PHY and SNI mode, input in MAC MII and RMII mode); RLL: RMII reference clock input."
      },
      {
        "number": "27",
        "name": "SMTXER3/MII_LINK_3",
        "type": "input",
        "description": "MII transmit error in MII mode; doubles as MII link indicator from host (high = no link) for bypass mode, with internal pull-down."
      },
      {
        "number": "28",
        "name": "SMRXDV3",
        "type": "bidirectional",
        "description": "Switch MII receive data valid; strap selects PHY mode (pull-up) or MAC mode (pull-down)."
      },
      {
        "number": "29",
        "name": "SMRXD33/REFCLKO_3",
        "type": "bidirectional",
        "description": "MLL/FLL: switch MII receive data bit 3; RLL: 50 MHz reference clock output in RMII mode; strap enables P2ANEN."
      },
      {
        "number": "30",
        "name": "SMRXD32",
        "type": "bidirectional",
        "description": "Switch MII receive data bit 2; strap forces port 2 speed (pull-up 100BT, pull-down 10BT when P2ANEN=0)."
      },
      {
        "number": "31",
        "name": "SMRXD31",
        "type": "bidirectional",
        "description": "Switch MII/RMII receive data bit 1; strap sets port 2 duplex mode (P2DPX)."
      },
      {
        "number": "32",
        "name": "GND",
        "type": "power_in",
        "description": "Digital ground."
      },
      {
        "number": "33",
        "name": "SMRXD30",
        "type": "bidirectional",
        "description": "Switch MII/RMII receive data bit 0; strap forces port 2 flow control (P2FFC)."
      },
      {
        "number": "34",
        "name": "SCRS3/NC",
        "type": "bidirectional",
        "description": "MLL/FLL: switch MII carrier sense; RLL: no connection with internal pull-up. Pull down with 1 kohm if only full-duplex is used."
      },
      {
        "number": "35",
        "name": "SCOL3/NC",
        "type": "bidirectional",
        "description": "MLL/FLL: switch MII collision detect; RLL: no connection with internal pull-up."
      },
      {
        "number": "36",
        "name": "SMRXC3/NC",
        "type": "bidirectional",
        "description": "MLL/FLL: switch MII receive clock (output in PHY mode, input in MAC mode); RLL: no connection."
      },
      {
        "number": "37",
        "name": "GND",
        "type": "power_in",
        "description": "Digital ground."
      },
      {
        "number": "38",
        "name": "VDDC",
        "type": "power_in",
        "description": "1.8V digital core power input from VDDCO (pin 56)."
      },
      {
        "number": "39",
        "name": "SPIQ",
        "type": "bidirectional",
        "description": "SPI slave serial data output (needs external pull-up when used); strap selects XCLK frequency (pull-up 25 MHz, pull-down 50 MHz)."
      },
      {
        "number": "40",
        "name": "SPISN",
        "type": "input",
        "description": "SPI slave chip select, active-low; high deselects the device and tri-states SPIQ. Needs external pull-up when used."
      },
      {
        "number": "41",
        "name": "INTRN",
        "type": "output",
        "description": "Active-low interrupt output to the host CPU, signalling a status bit set on lost link (see registers 187 and 188)."
      },
      {
        "number": "42",
        "name": "SCL_MDC",
        "type": "bidirectional",
        "description": "SPI/I2C slave clock input, I2C master clock output, or MIIM clock input depending on mode."
      },
      {
        "number": "43",
        "name": "SDA_MDIO",
        "type": "bidirectional",
        "description": "SPI slave data input, I2C data I/O, or MIIM data I/O depending on mode; needs external pull-up when used."
      },
      {
        "number": "44",
        "name": "NC",
        "type": "unconnected",
        "description": "Unused pin; the only NC pin that may be pulled down by a resistor for better EMI."
      },
      {
        "number": "45",
        "name": "P1ANEN",
        "type": "bidirectional",
        "description": "Strap: pull-up enables auto-negotiation on port 1, pull-down disables it."
      },
      {
        "number": "46",
        "name": "P1SPD",
        "type": "bidirectional",
        "description": "Strap: pull-up forces port 1 to 100BT and pull-down forces 10BT when P1ANEN=0."
      },
      {
        "number": "47",
        "name": "P1DPX",
        "type": "bidirectional",
        "description": "Strap: sets port 1 duplex default if auto-negotiation fails (pull-up full, pull-down half) or forces duplex when P1ANEN=0."
      },
      {
        "number": "48",
        "name": "GND",
        "type": "power_in",
        "description": "Digital ground."
      },
      {
        "number": "49",
        "name": "VDDC",
        "type": "power_in",
        "description": "1.8V digital core power input from VDDCO (pin 56)."
      },
      {
        "number": "50",
        "name": "P1FFC",
        "type": "bidirectional",
        "description": "Strap: pull-up always enables port 1 flow control; pull-down lets auto-negotiation decide."
      },
      {
        "number": "51",
        "name": "P3SPD",
        "type": "bidirectional",
        "description": "Strap: pull-up forces port 3 to 10BT; pull-down forces 100BT (default)."
      },
      {
        "number": "52",
        "name": "NC",
        "type": "unconnected",
        "description": "Unused pin; no external connection."
      },
      {
        "number": "53",
        "name": "NC",
        "type": "unconnected",
        "description": "Unused pin; no external connection."
      },
      {
        "number": "54",
        "name": "VDDIO",
        "type": "power_in",
        "description": "3.3V, 2.5V or 1.8V digital IO supply input; requires well-decoupled capacitors."
      },
      {
        "number": "55",
        "name": "GND",
        "type": "power_in",
        "description": "Digital ground."
      },
      {
        "number": "56",
        "name": "VDDCO",
        "type": "power_out",
        "description": "1.8V core output from the internal LDO, supplying VDDA_1.8 and VDDC; do not connect an external supply."
      },
      {
        "number": "57",
        "name": "NC",
        "type": "unconnected",
        "description": "Unused pin; no external connection."
      },
      {
        "number": "58",
        "name": "P1LED1",
        "type": "bidirectional",
        "description": "Port 1 LED indicator (speed by default); strap sets port 3 flow control (P3FFC), pull-up enables it."
      },
      {
        "number": "59",
        "name": "P1LED0",
        "type": "bidirectional",
        "description": "Port 1 LED indicator (link/activity by default); strap sets port 3 duplex (P3DPX), pull-up selects half-duplex; recommend external 0.5 kohm pull-down."
      },
      {
        "number": "60",
        "name": "P2LED1",
        "type": "bidirectional",
        "description": "Port 2 LED indicator (speed by default); with P2LED0 selects the serial bus configuration mode."
      },
      {
        "number": "61",
        "name": "P2LED0",
        "type": "bidirectional",
        "description": "Port 2 LED indicator (link/activity by default); with P2LED1 selects I2C master, I2C slave, SPI slave, or SMI/MIIM mode."
      },
      {
        "number": "62",
        "name": "RSTN",
        "type": "input",
        "description": "Hardware reset input, active-low, with internal pull-up."
      },
      {
        "number": "63",
        "name": "FXSD1",
        "type": "input",
        "description": "MLL/RLL: connect to analog ground by pull-down resistor; FLL: fiber signal detect input."
      },
      {
        "number": "64",
        "name": "VDDA_1.8",
        "type": "power_in",
        "description": "1.8V analog VDD input from VDDCO (pin 56) through an external ferrite bead and capacitors."
      }
    ],
    "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: Pinout taken from Table 2-1 and Figure 2-1, which are shared by the KSZ8873MLL/FLL/RLL family. Names; Only 26 of 95 datasheet pages were supplied. The 64-pin LQFP pinout is complete within the supplied "
        ],
        "pages_sent": 26,
        "cost_usd": 0.0618,
        "at": "2026-10-28T16:30:52"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/d57f2e7e007056824e1ee208c01684de.pdf",
        "pages": 95,
        "sha256": "5bfa1107d97e8afb",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 64,
        "described": 64,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
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        "file": "ksz8873mll.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          12.0,
          12.0,
          1.5
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "b0c827bc5c05552175d28affe44a5bd2ab45c9c36efff6ff07a74cc449b13db4",
        "checked": "2026-10-28",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "ksz8873mll-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
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        "extents_mm": [
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        "zmin_mm": 0.0,
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        "footprint_binding": "identity",
        "sha256": "b807227eb35bd87a53cef35d85f93ae538392969c292f4a41fac34cea889daff",
        "checked": "2026-10-28",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
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  }
}