KSZ8864CNXI

{
  "schema_version": 1,
  "type": "component",
  "slug": "ksz8864cnxi",
  "title": "KSZ8864CNXI",
  "brief": "Microchip Tech Ethernet ICs, QFN-64-EP(8x8). 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",
    "communication interface chip-uart-485-232",
    "ksz8864cnxi",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "KSZ8864CNXI",
    "manufacturer": "Microchip Tech",
    "package": "QFN-64-EP(8x8)",
    "pin_count": 65,
    "category": "Communication Interface Chip/UART/485/232",
    "subcategory": "Ethernet ICs",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/dbe922ec0106ac9eaef17951eced7747.pdf",
    "parts": {
      "symbol": "ksz8864cnxi.kicad_sym",
      "footprint": "ksz8864cnxi.kicad_mod",
      "model_3d": "ksz8864cnxi-hero.glb",
      "model_3d_plain": "ksz8864cnxi-etched.glb",
      "model_3d_step": "ksz8864cnxi-etched.step",
      "model_3d_step_plain": "ksz8864cnxi.step",
      "lbr": "ksz8864cnxi.lbr"
    },
    "distributor_links": {
      "lcsc": "C633473",
      "digikey": "KSZ8864CNXI-ND",
      "mouser": "579-KSZ8864CNXI"
    },
    "distributor_check": {
      "checked_at": "2026-10-28T22:15:18Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "KSZ8864CNXI-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "579-KSZ8864CNXI",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "RXP1",
        "type": "input",
        "description": "Physical receive signal + (differential) for the Port 1 PHY."
      },
      {
        "number": "2",
        "name": "RXM1",
        "type": "input",
        "description": "Physical receive signal - (differential) for the Port 1 PHY."
      },
      {
        "number": "3",
        "name": "TXP1",
        "type": "output",
        "description": "Physical transmit signal + (differential) for the Port 1 PHY."
      },
      {
        "number": "4",
        "name": "TXM1",
        "type": "output",
        "description": "Physical transmit signal - (differential) for the Port 1 PHY."
      },
      {
        "number": "5",
        "name": "VDDA12",
        "type": "power_in",
        "description": "1.2V analog power supply."
      },
      {
        "number": "6",
        "name": "GND",
        "type": "power_in",
        "description": "Ground, with all grounding of the die bottom."
      },
      {
        "number": "7",
        "name": "ISET",
        "type": "passive",
        "description": "Sets the 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": "Physical receive signal + (differential) for the Port 2 PHY."
      },
      {
        "number": "10",
        "name": "RXM2",
        "type": "input",
        "description": "Physical receive signal - (differential) for the Port 2 PHY."
      },
      {
        "number": "11",
        "name": "TXP2",
        "type": "output",
        "description": "Physical transmit signal + (differential) for the Port 2 PHY."
      },
      {
        "number": "12",
        "name": "TXM2",
        "type": "output",
        "description": "Physical transmit signal - (differential) for the Port 2 PHY."
      },
      {
        "number": "13",
        "name": "VDDAT",
        "type": "power_in",
        "description": "3.3V analog VDD."
      },
      {
        "number": "14",
        "name": "INTR_N",
        "type": "output",
        "description": "Interrupt output; this pin is an open-drain output."
      },
      {
        "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; input with internal pull-down."
      },
      {
        "number": "17",
        "name": "SM3TXD3",
        "type": "input",
        "description": "MAC3 switch MII transmit bit 3; input with internal pull-down."
      },
      {
        "number": "18",
        "name": "SM3TXD2",
        "type": "input",
        "description": "MAC3 switch MII transmit bit 2; input with internal pull-down."
      },
      {
        "number": "19",
        "name": "SM3TXD1",
        "type": "input",
        "description": "MAC3 switch MII/RMII transmit bit 1; input with internal pull-down."
      },
      {
        "number": "20",
        "name": "SM3TXD0",
        "type": "input",
        "description": "MAC3 switch MII/RMII transmit bit 0; input with internal pull-down."
      },
      {
        "number": "21",
        "name": "SM3TXC/SM3REFCLK",
        "type": "bidirectional",
        "description": "MAC3 MII transmit clock (input in MAC mode, output in PHY mode), or SW3-RMII reference clock input."
      },
      {
        "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) or SW3-RMII reference clock output; an unused RMII clock can be pulled down or disabled by Register 87."
      },
      {
        "number": "24",
        "name": "SM3RXDV/SM3CRSDV",
        "type": "bidirectional",
        "description": "SW3-MII receive data valid (SM3RXDV), or SW3-RMII carrier sense/receive data valid (SM3CRSDV); input with internal pull-down during reset."
      },
      {
        "number": "25",
        "name": "SM3RXD3",
        "type": "bidirectional",
        "description": "MAC3 MII receive bit 3; strap option: PD (default) enables flow control, PU disables flow control."
      },
      {
        "number": "26",
        "name": "SM3RXD2",
        "type": "bidirectional",
        "description": "MAC3 MII receive bit 2; strap option: PD (default) disables back pressure, PU enables back pressure."
      },
      {
        "number": "27",
        "name": "SM3RXD1",
        "type": "bidirectional",
        "description": "MAC3 MII/RMII receive bit 1; strap option: PD (default) drops excessive collision packets, PU does not drop them."
      },
      {
        "number": "28",
        "name": "SM3RXD0",
        "type": "bidirectional",
        "description": "MAC3 MII/RMII receive bit 0; strap option: PD (default) disables aggressive half-duplex back-off, PU enables it for performance."
      },
      {
        "number": "29",
        "name": "SM3CRS",
        "type": "bidirectional",
        "description": "MAC3 switch MII carrier sense."
      },
      {
        "number": "30",
        "name": "GND",
        "type": "power_in",
        "description": "Ground, with all grounding of the die bottom."
      },
      {
        "number": "31",
        "name": "SM3COL",
        "type": "bidirectional",
        "description": "MAC3 switch MII collision detect."
      },
      {
        "number": "32",
        "name": "SM4TXEN",
        "type": "input",
        "description": "MAC4 switch MII/RMII transmit enable; input with internal pull-down."
      },
      {
        "number": "33",
        "name": "SM4TXD3",
        "type": "input",
        "description": "MAC4 switch MII transmit bit 3; input with internal pull-down."
      },
      {
        "number": "34",
        "name": "SM4TXD2",
        "type": "input",
        "description": "MAC4 switch MII transmit bit 2; input with internal pull-down."
      },
      {
        "number": "35",
        "name": "SM4TXD1",
        "type": "input",
        "description": "MAC4 switch MII/RMII transmit bit 1; input with internal pull-down."
      },
      {
        "number": "36",
        "name": "SM4TXD0",
        "type": "input",
        "description": "MAC4 switch MII/RMII transmit bit 0; input with internal pull-down."
      },
      {
        "number": "37",
        "name": "SM4TXC/SM4REFCLK",
        "type": "bidirectional",
        "description": "MAC4 MII transmit clock (input in SW4-MII MAC mode, output in SW4-MII PHY mode), or SW4-RMII reference clock input selected by the P1LED1 strap."
      },
      {
        "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) or SW4-RMII 50 MHz reference clock output in default clock mode; disable by Register 87 in normal mode."
      },
      {
        "number": "40",
        "name": "SM4RXDV/SM4CRSDV",
        "type": "bidirectional",
        "description": "SW4-MII receive data valid (SM4RXDV), or SW4-RMII carrier sense/receive data valid (SM4CRSDV); input with internal pull-down during reset."
      },
      {
        "number": "41",
        "name": "SM4RXD3",
        "type": "bidirectional",
        "description": "MAC4 MII receive bit 3; strap option: PD (default) disables switch MII/RMII full-duplex flow control, PU enables it."
      },
      {
        "number": "42",
        "name": "SM4RXD2",
        "type": "bidirectional",
        "description": "MAC4 MII receive bit 2; strap option: PD (default) selects full-duplex mode, PU selects half-duplex mode."
      },
      {
        "number": "43",
        "name": "SM4RXD1",
        "type": "bidirectional",
        "description": "MAC4 MII/RMII receive bit 1; strap option: PD (default) selects 100 Mbps mode, PU selects 10 Mbps mode."
      },
      {
        "number": "44",
        "name": "SM4RXD0",
        "type": "bidirectional",
        "description": "MAC4 MII/RMII receive bit 0; strap option for LED mode: PD (default) mode 0, PU mode 1."
      },
      {
        "number": "45",
        "name": "SM4COL",
        "type": "bidirectional",
        "description": "MAC4 switch MII collision detect (input in MAC modes, output in PHY modes)."
      },
      {
        "number": "46",
        "name": "SM4CRS",
        "type": "bidirectional",
        "description": "MAC4 switch MII carrier sense (input in MAC modes, output in PHY modes)."
      },
      {
        "number": "47",
        "name": "SCONF1",
        "type": "input",
        "description": "Port 4 MAC4 MII mode select together with SCONF0: 00 (default) PHY mode, 01 disables port 3 and port 4, 10 disables port 4 only, 11 MAC mode; input with internal pull-down."
      },
      {
        "number": "48",
        "name": "SCONF0",
        "type": "input",
        "description": "Port 4 MAC4 MII mode select together with SCONF1 (see pin 47); input with internal pull-down."
      },
      {
        "number": "49",
        "name": "P2LED1",
        "type": "bidirectional",
        "description": "LED indicator for Port 2; this pin must be pulled down by a 1 kΩ resistor in this design."
      },
      {
        "number": "50",
        "name": "P2LED0",
        "type": "bidirectional",
        "description": "LED indicator for Port 2; strap option for Switch MAC3: PU (default) selects SW3-MII, PD selects SW3-RMII."
      },
      {
        "number": "51",
        "name": "P1LED1",
        "type": "bidirectional",
        "description": "LED indicator for Port 1; strap option for RMII: PU (default) clock mode with 25 MHz crystal on X1/X2, PD normal mode with external 50 MHz clock on SM4TXC."
      },
      {
        "number": "52",
        "name": "P1LED0",
        "type": "bidirectional",
        "description": "LED indicator for Port 1; strap option for Switch MAC4: PU (default) selects SW4-MII, PD selects SW4-RMII."
      },
      {
        "number": "53",
        "name": "MDC",
        "type": "input",
        "description": "MIIM management interface clock, or SMI interface clock; input with internal pull-up."
      },
      {
        "number": "54",
        "name": "MDIO",
        "type": "bidirectional",
        "description": "MIIM management data I/O, 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": "SPI slave clock input up to 25 MHz, or 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, or 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: when high the device is deselected and SPIQ is high-impedance; not used in I2C master mode."
      },
      {
        "number": "59",
        "name": "PS1",
        "type": "input",
        "description": "Serial bus configuration pin with PS0: 00 I2C master for EEPROM, 01 SMI, 10 SPI slave, 11 factory test (BIST); defaults to 00 if no EEPROM is present."
      },
      {
        "number": "60",
        "name": "PS0",
        "type": "input",
        "description": "Serial bus configuration pin (with PS1, see pin 59); input with internal pull-down."
      },
      {
        "number": "61",
        "name": "RST_N",
        "type": "input",
        "description": "Active-low device reset; input with internal pull-up."
      },
      {
        "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; crystal/oscillator tolerance must be ≤ ±50 ppm."
      },
      {
        "number": "64",
        "name": "X2",
        "type": "output",
        "description": "25 MHz crystal 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-haiku-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: Exposed thermal pad: the pin table (Table 2-1 and Figure 2-1) lists only pins 1-64 and prints no exp; Pin type mapping: the datasheet uses categories not in the KiCad set. IPU/O, IPD/O and IPU/O-style p",
          "exposed pad 65 added from the footprint"
        ],
        "pages_sent": 23,
        "cost_usd": 0.1422,
        "at": "2026-10-28T22:14:56"
      },
      "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"
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        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "553641350988a3d949874ef3cbbe3efa6e239859177963f45ba4e900f4c74ccf",
        "checked": "2026-10-28",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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        "sha256": "116553fee2a7a89e47b588a2cfb462e0ca231d4dcbdcf2ad274ebcfe86ddb9a6",
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        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Microchip Tech",
      "Package": "QFN-64-EP(8x8)",
      "Category": "Communication Interface Chip/UART/485/232",
      "Pins": "65"
    },
    "characteristics": {
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