KSZ8864CNXIA

{
  "slug": "ksz8864cnxia",
  "version": "0.1.0",
  "type": "component",
  "description": "Microchip Tech Interface - Specialized, QFN-64-EP(8x8). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "communication interface chip-uart-485-232",
    "ksz8864cnxia",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "ksz8864cnxia.kicad_sym",
    "ksz8864cnxia.kicad_mod",
    "ksz8864cnxia.glb",
    "ksz8864cnxia.step",
    "ksz8864cnxia.lbr",
    "docs/hero.png",
    "docs/ksz8864cnxia-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "ksz8864cnxia-hero.glb",
    "ksz8864cnxia-hero.overlay.json",
    "ksz8864cnxia-etched.glb"
  ],
  "component": {
    "mpn": "KSZ8864CNXIA",
    "manufacturer": "Microchip Tech",
    "package": "QFN-64-EP(8x8)",
    "pin_count": 65,
    "category": "Communication Interface Chip/UART/485/232",
    "subcategory": "Interface - Specialized",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/dbe922ec0106ac9eaef17951eced7747.pdf",
    "parts": {
      "symbol": "ksz8864cnxia.kicad_sym",
      "footprint": "ksz8864cnxia.kicad_mod",
      "model_3d": "ksz8864cnxia-hero.glb",
      "model_3d_plain": "ksz8864cnxia-etched.glb",
      "model_3d_step": "ksz8864cnxia-etched.step",
      "model_3d_step_plain": "ksz8864cnxia.step",
      "lbr": "ksz8864cnxia.lbr"
    },
    "distributor_links": {
      "lcsc": "C633474",
      "digikey": "KSZ8864CNXIA-ND",
      "mouser": "998-KSZ8864CNXIA"
    },
    "distributor_check": {
      "checked_at": "2026-10-31T12:35:23Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "KSZ8864CNXIA-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "998-KSZ8864CNXIA",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "RXP1",
        "type": "input",
        "description": "Port 1 physical receive signal + (differential)."
      },
      {
        "number": "2",
        "name": "RXM1",
        "type": "input",
        "description": "Port 1 physical receive signal - (differential)."
      },
      {
        "number": "3",
        "name": "TXP1",
        "type": "output",
        "description": "Port 1 physical transmit signal + (differential)."
      },
      {
        "number": "4",
        "name": "TXM1",
        "type": "output",
        "description": "Port 1 physical transmit signal - (differential)."
      },
      {
        "number": "5",
        "name": "VDDA12",
        "type": "power_in",
        "description": "1.2V analog power."
      },
      {
        "number": "6",
        "name": "GND",
        "type": "power_in",
        "description": "Ground, with all grounding of die bottom."
      },
      {
        "number": "7",
        "name": "ISET",
        "type": "passive",
        "description": "Sets physical transmit output current; pull down with a 12.4 kΩ 1% resistor."
      },
      {
        "number": "8",
        "name": "VDDAT",
        "type": "power_in",
        "description": "3.3V analog VDD."
      },
      {
        "number": "9",
        "name": "RXP2",
        "type": "input",
        "description": "Port 2 physical receive signal + (differential)."
      },
      {
        "number": "10",
        "name": "RXM2",
        "type": "input",
        "description": "Port 2 physical receive signal - (differential)."
      },
      {
        "number": "11",
        "name": "TXP2",
        "type": "output",
        "description": "Port 2 physical transmit signal + (differential)."
      },
      {
        "number": "12",
        "name": "TXM2",
        "type": "output",
        "description": "Port 2 physical transmit signal - (differential)."
      },
      {
        "number": "13",
        "name": "VDDAT",
        "type": "power_in",
        "description": "3.3V analog VDD."
      },
      {
        "number": "14",
        "name": "INTR_N",
        "type": "output",
        "description": "Interrupt, open-drain output with internal pull-up."
      },
      {
        "number": "15",
        "name": "VDDC",
        "type": "power_in",
        "description": "1.2V digital core VDD."
      },
      {
        "number": "16",
        "name": "SM3TXEN",
        "type": "input",
        "description": "MAC3 switch MII/RMII transmit enable (internal pull-down)."
      },
      {
        "number": "17",
        "name": "SM3TXD3",
        "type": "input",
        "description": "MAC3 switch MII transmit bit 3 (internal pull-down)."
      },
      {
        "number": "18",
        "name": "SM3TXD2",
        "type": "input",
        "description": "MAC3 switch MII transmit bit 2 (internal pull-down)."
      },
      {
        "number": "19",
        "name": "SM3TXD1",
        "type": "input",
        "description": "MAC3 switch MII/RMII transmit bit 1 (internal pull-down)."
      },
      {
        "number": "20",
        "name": "SM3TXD0",
        "type": "input",
        "description": "MAC3 switch MII/RMII transmit bit 0 (internal pull-down)."
      },
      {
        "number": "21",
        "name": "SM3TXC/SM3REFCLK",
        "type": "bidirectional",
        "description": "MAC3 MII transmit clock: input in SW3-MII MAC mode, output in PHY mode, input as SW3-RMII reference clock."
      },
      {
        "number": "22",
        "name": "VDDIO",
        "type": "power_in",
        "description": "3.3V, 2.5V, or 1.8V digital VDD for digital I/O circuitry."
      },
      {
        "number": "23",
        "name": "SM3RXC",
        "type": "bidirectional",
        "description": "MAC3 MII receive clock: input in MAC mode, output in PHY mode, output as SW3-RMII reference clock; unused RMII clock can be pulled down or disabled by Register 87."
      },
      {
        "number": "24",
        "name": "SM3RXDV/SM3CRSDV",
        "type": "bidirectional",
        "description": "SM3RXDV: MAC3 SW3-MII receive data valid; SM3CRSDV: SW3-RMII carrier sense/receive data valid (internal pull-down during reset)."
      },
      {
        "number": "25",
        "name": "SM3RXD3",
        "type": "bidirectional",
        "description": "MAC3 MII receive bit 3; strap: PD (default) = enable flow control, PU = disable flow control."
      },
      {
        "number": "26",
        "name": "SM3RXD2",
        "type": "bidirectional",
        "description": "MAC3 MII receive bit 2; strap: PD (default) = disable back pressure, PU = enable back pressure."
      },
      {
        "number": "27",
        "name": "SM3RXD1",
        "type": "bidirectional",
        "description": "MAC3 MII/RMII receive bit 1; strap: PD (default) = drop excessive collision packets, PU = do not drop them."
      },
      {
        "number": "28",
        "name": "SM3RXD0",
        "type": "bidirectional",
        "description": "MAC3 MII/RMII receive bit 0; strap: PD (default) = disable aggressive back-off in half-duplex, PU = enable for performance enhancement."
      },
      {
        "number": "29",
        "name": "SM3CRS",
        "type": "bidirectional",
        "description": "MAC3 switch MII carrier sense (internal pull-down during reset)."
      },
      {
        "number": "30",
        "name": "GND",
        "type": "power_in",
        "description": "Ground, with all grounding of die bottom."
      },
      {
        "number": "31",
        "name": "SM3COL",
        "type": "bidirectional",
        "description": "MAC3 switch MII collision detect (internal pull-down during reset)."
      },
      {
        "number": "32",
        "name": "SM4TXEN",
        "type": "input",
        "description": "MAC4 switch MII/RMII transmit enable (internal pull-down)."
      },
      {
        "number": "33",
        "name": "SM4TXD3",
        "type": "input",
        "description": "MAC4 switch MII transmit bit 3 (internal pull-down)."
      },
      {
        "number": "34",
        "name": "SM4TXD2",
        "type": "input",
        "description": "MAC4 switch MII transmit bit 2 (internal pull-down)."
      },
      {
        "number": "35",
        "name": "SM4TXD1",
        "type": "input",
        "description": "MAC4 switch MII/RMII transmit bit 1 (internal pull-down)."
      },
      {
        "number": "36",
        "name": "SM4TXD0",
        "type": "input",
        "description": "MAC4 switch MII/RMII transmit bit 0 (internal pull-down)."
      },
      {
        "number": "37",
        "name": "SM4TXC/SM4REFCLK",
        "type": "bidirectional",
        "description": "MAC4 MII transmit clock: input in SW4-MII MAC mode, output in PHY mode, input as SW4-RMII reference clock (see strap P1LED1 for clock/normal mode)."
      },
      {
        "number": "38",
        "name": "VDDIO",
        "type": "power_in",
        "description": "3.3V, 2.5V, or 1.8V digital VDD for digital I/O circuitry."
      },
      {
        "number": "39",
        "name": "SM4RXC",
        "type": "bidirectional",
        "description": "MAC4 MII receive clock: input in MAC mode, output in PHY mode, output 50 MHz SW4-RMII reference clock in clock mode (disable by Register 87 in normal mode)."
      },
      {
        "number": "40",
        "name": "SM4RXDV/SM4CRSDV",
        "type": "bidirectional",
        "description": "SM4RXDV: MAC4 SW4-MII receive data valid; SM4CRSDV: SW4-RMII carrier sense/receive data valid."
      },
      {
        "number": "41",
        "name": "SM4RXD3",
        "type": "bidirectional",
        "description": "MAC4 MII receive bit 3; strap: PD (default) = disable switch MII/RMII full-duplex flow control, PU = enable."
      },
      {
        "number": "42",
        "name": "SM4RXD2",
        "type": "bidirectional",
        "description": "MAC4 MII receive bit 2; strap: PD (default) = full-duplex, PU = half-duplex."
      },
      {
        "number": "43",
        "name": "SM4RXD1",
        "type": "bidirectional",
        "description": "MAC4 MII/RMII receive bit 1; strap: PD (default) = 100 Mbps mode, PU = 10 Mbps mode."
      },
      {
        "number": "44",
        "name": "SM4RXD0",
        "type": "bidirectional",
        "description": "MAC4 MII/RMII receive bit 0; strap LED mode: PD (default) = mode 0, PU = mode 1."
      },
      {
        "number": "45",
        "name": "SM4COL",
        "type": "bidirectional",
        "description": "MAC4 MII collision detect: input in SW4-MII MAC mode, output in PHY mode."
      },
      {
        "number": "46",
        "name": "SM4CRS",
        "type": "bidirectional",
        "description": "MAC4 MII carrier sense: input in SW4-MII MAC mode, output in PHY mode."
      },
      {
        "number": "47",
        "name": "SCONF1",
        "type": "input",
        "description": "With SCONF0 selects port 4 mode: 00 (default) PHY mode, 01 disable ports 3 and 4, 10 disable port 4 only, 11 MAC mode (internal pull-down)."
      },
      {
        "number": "48",
        "name": "SCONF0",
        "type": "input",
        "description": "With SCONF1 selects port 4 SW4-MII PHY/MAC mode or port disable (internal pull-down); see pin 47."
      },
      {
        "number": "49",
        "name": "P2LED1",
        "type": "bidirectional",
        "description": "Port 2 LED indicator; must be pulled down by a 1 kΩ resistor in the design."
      },
      {
        "number": "50",
        "name": "P2LED0",
        "type": "bidirectional",
        "description": "Port 2 LED indicator; strap for MAC3: PU (default) = MII, PD = RMII."
      },
      {
        "number": "51",
        "name": "P1LED1",
        "type": "bidirectional",
        "description": "Port 1 LED indicator; strap for RMII: PU (default) = clock mode from 25 MHz crystal, PD = normal mode with external 50 MHz clock on SM4TXC."
      },
      {
        "number": "52",
        "name": "P1LED0",
        "type": "bidirectional",
        "description": "Port 1 LED indicator; strap for MAC4: PU (default) = MII, PD = RMII."
      },
      {
        "number": "53",
        "name": "MDC",
        "type": "input",
        "description": "MII management (MIIM) or SMI interface clock (internal pull-up)."
      },
      {
        "number": "54",
        "name": "MDIO",
        "type": "bidirectional",
        "description": "MIIM management or SMI interface data I/O; needs an external pull-up when driven."
      },
      {
        "number": "55",
        "name": "SPIQ",
        "type": "bidirectional",
        "description": "SPI serial data output in SPI slave mode; needs an external pull-up when driven."
      },
      {
        "number": "56",
        "name": "SPIC/SCL",
        "type": "bidirectional",
        "description": "Input clock up to 25 MHz in SPI slave mode; output clock at 61 kHz in I2C master mode; needs an external pull-up when driven."
      },
      {
        "number": "57",
        "name": "SPID/SDA",
        "type": "bidirectional",
        "description": "Serial data input in SPI slave mode; serial data input/output in I2C master mode; needs an external pull-up when driven."
      },
      {
        "number": "58",
        "name": "SPIS_N",
        "type": "input",
        "description": "Active-low SPI slave select: high deselects device and tri-states SPIQ, high-to-low starts transfer; unused in I2C master mode."
      },
      {
        "number": "59",
        "name": "PS1",
        "type": "input",
        "description": "Serial bus configuration with PS0: 00 I2C master (EEPROM), 01 SMI, 10 SPI slave, 11 factory test (BIST)."
      },
      {
        "number": "60",
        "name": "PS0",
        "type": "input",
        "description": "Serial bus configuration pin, used with PS1 (internal pull-down)."
      },
      {
        "number": "61",
        "name": "RST_N",
        "type": "input",
        "description": "Active-low device reset."
      },
      {
        "number": "62",
        "name": "VDDC",
        "type": "power_in",
        "description": "1.2V digital core VDD."
      },
      {
        "number": "63",
        "name": "X1",
        "type": "input",
        "description": "25 MHz crystal connection or 3.3V oscillator input; tolerance ≤ ±50 ppm."
      },
      {
        "number": "64",
        "name": "X2",
        "type": "output",
        "description": "25 MHz crystal clock connection."
      },
      {
        "number": "65",
        "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-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 does not list the exposed pad as a numbered pin or give its connection. Pin 6 and; The text does not state the package as 8x8 or as exposed-pad. It gives only '64-pin QFN' (N). The KS; Pin types for IPU/O and IPD/O pins (inputs with pull during reset, outputs otherwise) were mapped to"
        ],
        "pages_sent": 23,
        "cost_usd": 0.2667,
        "at": "2026-10-31T12:35:02"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/dbe922ec0106ac9eaef17951eced7747.pdf",
        "pages": 98,
        "sha256": "00c8886e1e293e06",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 65,
        "described": 65,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "ksz8864cnxia.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          8.0,
          8.0,
          0.87
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "553641350988a3d949874ef3cbbe3efa6e239859177963f45ba4e900f4c74ccf",
        "checked": "2026-10-31",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "ksz8864cnxia-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          8.0,
          8.0,
          0.87
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "0493089a270852c1f1e4d9279657e4efc5f0a7dbd891cd8009516d97d28b14ab",
        "checked": "2026-10-31",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}