KSZ9021RL

{
  "slug": "ksz9021rl",
  "version": "0.1.0",
  "type": "component",
  "description": "Microchip Tech Receivers & Transceivers, LQFP-64(10x10). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "logic ics",
    "ksz9021rl",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "ksz9021rl.kicad_sym",
    "ksz9021rl.kicad_mod",
    "ksz9021rl.glb",
    "ksz9021rl.step",
    "ksz9021rl.lbr",
    "docs/hero.png",
    "docs/ksz9021rl-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "ksz9021rl-hero.glb",
    "ksz9021rl-hero.overlay.json",
    "ksz9021rl-etched.glb"
  ],
  "component": {
    "mpn": "KSZ9021RL",
    "manufacturer": "Microchip Tech",
    "package": "LQFP-64(10x10)",
    "pin_count": 64,
    "category": "Logic ICs",
    "subcategory": "Receivers & Transceivers",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/b6cab378e9d4b54c5ad5e02f473023f6.pdf",
    "parts": {
      "symbol": "ksz9021rl.kicad_sym",
      "footprint": "ksz9021rl.kicad_mod",
      "model_3d": "ksz9021rl-hero.glb",
      "model_3d_plain": "ksz9021rl-etched.glb",
      "model_3d_step": "ksz9021rl-etched.step",
      "model_3d_step_plain": "ksz9021rl.step",
      "lbr": "ksz9021rl.lbr"
    },
    "distributor_links": {
      "lcsc": "C634221",
      "digikey": "576-3439-ND",
      "mouser": "998-KSZ9021RL"
    },
    "distributor_check": {
      "checked_at": "2026-10-30T18:18:04Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "576-3439-ND",
        "status": "found",
        "lifecycle": "Obsolete"
      },
      "mouser": {
        "pn": "998-KSZ9021RL",
        "status": "found",
        "lifecycle": "Obsolete"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "TXRXP_A",
        "type": "bidirectional",
        "description": "Media Dependent Interface[0] positive differential signal, used as TX+ or RX+ in 10/100 modes (MDI or MDI-X) and as BI_DA+ or BI_DB+ in 1000Base-T mode."
      },
      {
        "number": "2",
        "name": "TXRXM_A",
        "type": "bidirectional",
        "description": "Media Dependent Interface[0] negative differential signal, used as TX- or RX- in 10/100 modes (MDI or MDI-X) and as BI_DA- or BI_DB- in 1000Base-T mode."
      },
      {
        "number": "3",
        "name": "AGNDH",
        "type": "power_in",
        "description": "Analog ground."
      },
      {
        "number": "4",
        "name": "AVDDL",
        "type": "power_in",
        "description": "1.2V analog VDD."
      },
      {
        "number": "5",
        "name": "AVDDL",
        "type": "power_in",
        "description": "1.2V analog VDD."
      },
      {
        "number": "6",
        "name": "AVDDH",
        "type": "power_in",
        "description": "3.3V analog VDD."
      },
      {
        "number": "7",
        "name": "TXRXP_B",
        "type": "bidirectional",
        "description": "Media Dependent Interface[1] positive differential signal, used as RX+ or TX+ in 10/100 modes (MDI or MDI-X) and as BI_DB+ or BI_DA+ in 1000Base-T mode."
      },
      {
        "number": "8",
        "name": "TXRXM_B",
        "type": "bidirectional",
        "description": "Media Dependent Interface[1] negative differential signal, used as RX- or TX- in 10/100 modes (MDI or MDI-X) and as BI_DB- or BI_DA- in 1000Base-T mode."
      },
      {
        "number": "9",
        "name": "AGNDH",
        "type": "power_in",
        "description": "Analog ground."
      },
      {
        "number": "10",
        "name": "TXRXP_C",
        "type": "bidirectional",
        "description": "Media Dependent Interface[2] positive differential signal, used in 1000Base-T mode (BI_DC+ or BI_DD+); not used in 10/100 modes."
      },
      {
        "number": "11",
        "name": "TXRXM_C",
        "type": "bidirectional",
        "description": "Media Dependent Interface[2] negative differential signal, used in 1000Base-T mode (BI_DC- or BI_DD-); not used in 10/100 modes."
      },
      {
        "number": "12",
        "name": "AVDDL",
        "type": "power_in",
        "description": "1.2V analog VDD."
      },
      {
        "number": "13",
        "name": "AVDDL",
        "type": "power_in",
        "description": "1.2V analog VDD."
      },
      {
        "number": "14",
        "name": "TXRXP_D",
        "type": "bidirectional",
        "description": "Media Dependent Interface[3] positive differential signal, used in 1000Base-T mode (BI_DD+ or BI_DC+); not used in 10/100 modes."
      },
      {
        "number": "15",
        "name": "TXRXM_D",
        "type": "bidirectional",
        "description": "Media Dependent Interface[3] negative differential signal, used in 1000Base-T mode (BI_DD- or BI_DC-); not used in 10/100 modes."
      },
      {
        "number": "16",
        "name": "AVDDH",
        "type": "power_in",
        "description": "3.3V analog VDD."
      },
      {
        "number": "17",
        "name": "VSS",
        "type": "power_in",
        "description": "Digital ground."
      },
      {
        "number": "18",
        "name": "VSS",
        "type": "power_in",
        "description": "Digital ground."
      },
      {
        "number": "19",
        "name": "LED2 / PHYAD1",
        "type": "bidirectional",
        "description": "Programmable LED2 output (function set by LED_MODE strap on pin 55); its pull-up/pull-down is latched as PHYAD[1] at power-up/reset."
      },
      {
        "number": "20",
        "name": "DVDDH",
        "type": "power_in",
        "description": "3.3V/2.5V digital VDD."
      },
      {
        "number": "21",
        "name": "LED1 / PHYAD0",
        "type": "bidirectional",
        "description": "Programmable LED1 output (function set by LED_MODE strap on pin 55); its pull-up/pull-down is latched as PHYAD[0] at power-up/reset."
      },
      {
        "number": "22",
        "name": "DVDDL",
        "type": "power_in",
        "description": "1.2V digital VDD."
      },
      {
        "number": "23",
        "name": "VSS",
        "type": "power_in",
        "description": "Digital ground."
      },
      {
        "number": "24",
        "name": "TXD0",
        "type": "input",
        "description": "RGMII TD0 transmit data bit 0 input from the MAC."
      },
      {
        "number": "25",
        "name": "TXD1",
        "type": "input",
        "description": "RGMII TD1 transmit data bit 1 input from the MAC."
      },
      {
        "number": "26",
        "name": "TXD2",
        "type": "input",
        "description": "RGMII TD2 transmit data bit 2 input from the MAC."
      },
      {
        "number": "27",
        "name": "TXD3",
        "type": "input",
        "description": "RGMII TD3 transmit data bit 3 input from the MAC."
      },
      {
        "number": "28",
        "name": "VSS",
        "type": "power_in",
        "description": "Digital ground."
      },
      {
        "number": "29",
        "name": "DVDDL",
        "type": "power_in",
        "description": "1.2V digital VDD."
      },
      {
        "number": "30",
        "name": "DVDDH",
        "type": "power_in",
        "description": "3.3V/2.5V digital VDD."
      },
      {
        "number": "31",
        "name": "TX_ER",
        "type": "input",
        "description": "Not used in RGMII mode; the datasheet says to leave this pin as a no connect."
      },
      {
        "number": "32",
        "name": "GTX_CLK",
        "type": "input",
        "description": "RGMII TXC transmit reference clock input from the MAC (125MHz for 1000Mbps, 25MHz for 100Mbps, 2.5MHz for 10Mbps)."
      },
      {
        "number": "33",
        "name": "TX_EN",
        "type": "input",
        "description": "RGMII TX_CTL transmit control input from the MAC."
      },
      {
        "number": "34",
        "name": "VSS",
        "type": "power_in",
        "description": "Digital ground."
      },
      {
        "number": "35",
        "name": "DVDDL",
        "type": "power_in",
        "description": "1.2V digital VDD."
      },
      {
        "number": "36",
        "name": "RXD3 / MODE3",
        "type": "bidirectional",
        "description": "RGMII RD3 receive data bit 3 output; its pull-up/pull-down is latched as MODE3 strap at power-up/reset."
      },
      {
        "number": "37",
        "name": "DVDDH",
        "type": "power_in",
        "description": "3.3V/2.5V digital VDD."
      },
      {
        "number": "38",
        "name": "RXD2 / MODE2",
        "type": "bidirectional",
        "description": "RGMII RD2 receive data bit 2 output; its pull-up/pull-down is latched as MODE2 strap at power-up/reset."
      },
      {
        "number": "39",
        "name": "VSS",
        "type": "power_in",
        "description": "Digital ground."
      },
      {
        "number": "40",
        "name": "DVDDL",
        "type": "power_in",
        "description": "1.2V digital VDD."
      },
      {
        "number": "41",
        "name": "RXD1 / MODE1",
        "type": "bidirectional",
        "description": "RGMII RD1 receive data bit 1 output; its pull-up/pull-down is latched as MODE1 strap at power-up/reset."
      },
      {
        "number": "42",
        "name": "RXD0 / MODE0",
        "type": "bidirectional",
        "description": "RGMII RD0 receive data bit 0 output; its pull-up/pull-down is latched as MODE0 strap at power-up/reset."
      },
      {
        "number": "43",
        "name": "RX_DV / CLK125_EN",
        "type": "bidirectional",
        "description": "RGMII RX_CTL receive control output; latched as CLK125_NDO output enable at power-up/reset (pull-up enables, pull-down disables the 125MHz clock)."
      },
      {
        "number": "44",
        "name": "DVDDH",
        "type": "power_in",
        "description": "3.3V/2.5V digital VDD."
      },
      {
        "number": "45",
        "name": "RX_ER",
        "type": "output",
        "description": "Not used in RGMII mode; the datasheet says to leave this pin as a no connect."
      },
      {
        "number": "46",
        "name": "RX_CLK / PHYAD2",
        "type": "bidirectional",
        "description": "RGMII RXC receive reference clock output (125MHz, 25MHz or 2.5MHz); its pull-up/pull-down is latched as PHYAD[2] at power-up/reset."
      },
      {
        "number": "47",
        "name": "CRS",
        "type": "output",
        "description": "Not used in RGMII mode; the datasheet says to leave this pin as a no connect."
      },
      {
        "number": "48",
        "name": "MDC",
        "type": "input",
        "description": "Management Data Clock input, the reference clock for MDIO (pin 49); input has internal pull-up."
      },
      {
        "number": "49",
        "name": "MDIO",
        "type": "bidirectional",
        "description": "Management Data Input/Output, synchronous to MDC (pin 48); requires an external pull-up of 1.0k to 4.7k to 3.3V/2.5V digital VDD."
      },
      {
        "number": "50",
        "name": "COL",
        "type": "output",
        "description": "Not used in RGMII mode; the datasheet says to leave this pin as a no connect."
      },
      {
        "number": "51",
        "name": "INT_N",
        "type": "output",
        "description": "Programmable interrupt output, active low by default (register 1Fh bit 14 selects active high); requires an external pull-up of 1.0k to 4.7k to 3.3V/2.5V digital VDD."
      },
      {
        "number": "52",
        "name": "DVDDL",
        "type": "power_in",
        "description": "1.2V digital VDD."
      },
      {
        "number": "53",
        "name": "VSS",
        "type": "power_in",
        "description": "Digital ground."
      },
      {
        "number": "54",
        "name": "DVDDL",
        "type": "power_in",
        "description": "1.2V digital VDD."
      },
      {
        "number": "55",
        "name": "CLK125_NDO / LED_MODE",
        "type": "bidirectional",
        "description": "125MHz reference clock output for the MAC; its pull-up/pull-down is latched as LED_MODE at power-up/reset (pull-up = single LED mode, pull-down = tri-color dual LED mode)."
      },
      {
        "number": "56",
        "name": "RESET_N",
        "type": "input",
        "description": "Active-low chip reset; hardware strap configurations are latched on the rising edge (de-assertion) of RESET_N; input has internal pull-up."
      },
      {
        "number": "57",
        "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; can be left floating if 1.2V is supplied by the system."
      },
      {
        "number": "58",
        "name": "AVDDL_PLL",
        "type": "power_in",
        "description": "1.2V analog VDD for the PLL."
      },
      {
        "number": "59",
        "name": "XO",
        "type": "output",
        "description": "25MHz crystal feedback; a no connect if an oscillator or external clock source is used."
      },
      {
        "number": "60",
        "name": "XI",
        "type": "input",
        "description": "Crystal, oscillator or external clock input, 25MHz ±50ppm tolerance."
      },
      {
        "number": "61",
        "name": "AVDDH",
        "type": "power_in",
        "description": "3.3V analog VDD."
      },
      {
        "number": "62",
        "name": "ISET",
        "type": "bidirectional",
        "description": "Sets the transmit output level; connect a 4.99K 1% resistor to ground on this pin."
      },
      {
        "number": "63",
        "name": "AGNDH_BG",
        "type": "power_in",
        "description": "Analog ground for the bandgap reference."
      },
      {
        "number": "64",
        "name": "AVDDH",
        "type": "power_in",
        "description": "3.3V analog VDD."
      }
    ],
    "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 64-pin E-LQFP (10mm x 10mm) is the package the KSZ9021RL is sold in (page 1 and page 4), so the ; The exposed pad is not a numbered lead. It is printed as 'E-PAD' in the datasheet table, so it is li; Pins 31, 45, 47 and 50 are not used in RGMII mode and the datasheet says to leave them as no connect",
          "dropped thermal pad ['EP'] absent from footprint",
          "1/64 pin names appear NOWHERE in the datasheet text: ['59:XO@p11']"
        ],
        "pages_sent": 36,
        "cost_usd": 0.1634,
        "at": "2026-10-30T18:17:52"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/b6cab378e9d4b54c5ad5e02f473023f6.pdf",
        "pages": 67,
        "sha256": "6361a105df1c9bc1",
        "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": [
      {
        "file": "ksz9021rl.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": "2026-10-30",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "ksz9021rl-etched.step",
        "role": "eda",
        "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": "d3efc786dbaa86ec19644c0029ac26eb3fcc753667ba75f93aa7b091795dfb5b",
        "checked": "2026-10-30",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}