LAN9352

{
  "schema_version": 1,
  "type": "component",
  "slug": "lan9352",
  "title": "LAN9352",
  "brief": "Microchip Tech Ethernet ICs, TQFP-80(12x12). 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",
    "lan9352",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "LAN9352",
    "manufacturer": "Microchip Tech",
    "package": "TQFP-80(12x12)",
    "pin_count": 80,
    "category": "Communication Interface Chip/UART/485/232",
    "subcategory": "Ethernet ICs",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/9e0986d309f7f18cca1ae704956b3cb2.pdf",
    "parts": {
      "symbol": "lan9352.kicad_sym",
      "footprint": "lan9352.kicad_mod",
      "model_3d": "lan9352-hero.glb",
      "model_3d_plain": "lan9352-etched.glb",
      "model_3d_step": "lan9352-etched.step",
      "model_3d_step_plain": "lan9352.step",
      "lbr": "lan9352.lbr"
    },
    "distributor_links": {
      "lcsc": "C635529"
    },
    "distributor_check": {
      "checked_at": "2026-10-31T12:36:09Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "OSCI",
        "type": "input",
        "description": "External 25 MHz crystal input, which can also be driven by a single-ended clock oscillator (leave OSCO unconnected in that case)."
      },
      {
        "number": "2",
        "name": "OSCO",
        "type": "output",
        "description": "External 25 MHz crystal output."
      },
      {
        "number": "3",
        "name": "OSCVDD12",
        "type": "power_in",
        "description": "Crystal +1.2 V power supply, supplied by the on-chip regulator unless configured for regulator off mode via REG_EN."
      },
      {
        "number": "4",
        "name": "OSCVSS",
        "type": "power_in",
        "description": "Crystal ground."
      },
      {
        "number": "5",
        "name": "VDD33",
        "type": "power_in",
        "description": "+3.3 V power supply for the internal regulators; must be supplied even if the internal regulators are disabled."
      },
      {
        "number": "6",
        "name": "VDDCR",
        "type": "power_in",
        "description": "+1.2 V digital core supply, from the on-chip regulator unless in regulator off mode; use 1 µF and 470 pF decoupling capacitors in parallel to ground."
      },
      {
        "number": "7",
        "name": "REG_EN",
        "type": "input",
        "description": "Regulator enable; when tied to 3.3 V the internal 1.2 V regulators are enabled."
      },
      {
        "number": "8",
        "name": "FXLOSEN",
        "type": "input",
        "description": "Three-level strap: below 1 V selects FX-SD/copper for ports A and B, 1.5 V selects FX-LOS for port A only, above 2 V selects FX-LOS for both ports."
      },
      {
        "number": "9",
        "name": "FXSDA/FXLOSA/FXSDENA",
        "type": "input",
        "description": "Port A fiber signal detect (above 2 V typ. is valid signal), loss-of-signal input (high = LOS) in FX-LOS mode, or FX-SD enable strap (above 1 V typ. selects FX-SD)."
      },
      {
        "number": "10",
        "name": "FXSDB/FXLOSB/FXSDENB",
        "type": "input",
        "description": "Port B fiber signal detect (above 2 V typ. is valid signal), loss-of-signal input (high = LOS) in FX-LOS mode, or FX-SD enable strap (above 1 V typ. selects FX-SD)."
      },
      {
        "number": "11",
        "name": "RST#",
        "type": "input",
        "description": "Active-low system reset input with internal pull-up; may be left unconnected since the device has an internal power-on reset."
      },
      {
        "number": "12",
        "name": "GPIO7",
        "type": "bidirectional",
        "description": "General purpose I/O 7, programmable as push-pull output, open-drain output or Schmitt-triggered input, with internal pull-up."
      },
      {
        "number": "13",
        "name": "GPIO6",
        "type": "bidirectional",
        "description": "General purpose I/O 6, programmable as push-pull output, open-drain output or Schmitt-triggered input, with internal pull-up."
      },
      {
        "number": "14",
        "name": "D2/AD2/SIO2",
        "type": "bidirectional",
        "description": "Host bus data bit 2 (indexed mode), address/data bit 2 (multiplexed mode), or SPI/SQI serial data I/O 2."
      },
      {
        "number": "15",
        "name": "D1/AD1/SO/SIO1",
        "type": "bidirectional",
        "description": "Host bus data bit 1 (indexed), address/data bit 1 (multiplexed), SPI serial data output SO or SQI data I/O 1 (with pull-up)."
      },
      {
        "number": "16",
        "name": "VDDIO",
        "type": "power_in",
        "description": "+1.8 V to +3.3 V variable I/O power."
      },
      {
        "number": "17",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect; must be left unconnected for proper operation."
      },
      {
        "number": "18",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect; must be left unconnected for proper operation."
      },
      {
        "number": "19",
        "name": "D14/AD14",
        "type": "bidirectional",
        "description": "Host bus data bit 14 (indexed mode) or address/data bit 14 (multiplexed mode); unused in SPI mode."
      },
      {
        "number": "20",
        "name": "D13/AD13",
        "type": "bidirectional",
        "description": "Host bus data bit 13 (indexed mode) or address/data bit 13 (multiplexed mode); unused in SPI mode."
      },
      {
        "number": "21",
        "name": "D0/AD0/SI/SIO0",
        "type": "bidirectional",
        "description": "Host bus data bit 0 (indexed), address/data bit 0 (multiplexed), SPI serial data input SI or SQI data I/O 0."
      },
      {
        "number": "22",
        "name": "PME",
        "type": "output",
        "description": "Power management event output asserted on a wakeup event; polarity and buffer type (open-drain or push-pull) are programmable."
      },
      {
        "number": "23",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect; must be left unconnected for proper operation."
      },
      {
        "number": "24",
        "name": "LED5/GPIO5/PHYADD",
        "type": "bidirectional",
        "description": "LED 5 output or GPIO5 depending on LED5 enable, also the PHY address configuration strap latched at reset (internal pull-up)."
      },
      {
        "number": "25",
        "name": "LED4/GPIO4/1588EN",
        "type": "bidirectional",
        "description": "LED 4 output or GPIO4 depending on LED4 enable, also the 1588 enable configuration strap latched at reset (internal pull-up)."
      },
      {
        "number": "26",
        "name": "D9/AD9/SCK",
        "type": "bidirectional",
        "description": "Host bus data bit 9 (indexed), address/data bit 9 (multiplexed), or SPI/SQI slave serial clock input."
      },
      {
        "number": "27",
        "name": "VDDIO",
        "type": "power_in",
        "description": "+1.8 V to +3.3 V variable I/O power."
      },
      {
        "number": "28",
        "name": "D12/AD12",
        "type": "bidirectional",
        "description": "Host bus data bit 12 (indexed mode) or address/data bit 12 (multiplexed mode); unused in SPI mode."
      },
      {
        "number": "29",
        "name": "D11/AD11",
        "type": "bidirectional",
        "description": "Host bus data bit 11 (indexed mode) or address/data bit 11 (multiplexed mode); unused in SPI mode."
      },
      {
        "number": "30",
        "name": "D10/AD10",
        "type": "bidirectional",
        "description": "Host bus data bit 10 (indexed mode) or address/data bit 10 (multiplexed mode); unused in SPI mode."
      },
      {
        "number": "31",
        "name": "VDDCR",
        "type": "power_in",
        "description": "+1.2 V digital core supply, from the on-chip regulator unless in regulator off mode."
      },
      {
        "number": "32",
        "name": "A1/ALELO",
        "type": "input",
        "description": "Host bus address bit 1 (indexed mode) or address latch enable low (multiplexed mode) used to load the lower address byte."
      },
      {
        "number": "33",
        "name": "A3/MNGT2",
        "type": "input",
        "description": "Host bus address bit 3 (indexed mode); also host interface configuration strap 2 (MNGT2) latched at reset."
      },
      {
        "number": "34",
        "name": "A4/MNGT3",
        "type": "input",
        "description": "Host bus address bit 4 (indexed mode); also host interface configuration strap 3 (MNGT3, address phase) latched at reset."
      },
      {
        "number": "35",
        "name": "CS",
        "type": "input",
        "description": "Host bus chip select, normally active low, indicating the device is selected for the current transfer."
      },
      {
        "number": "36",
        "name": "A2/ALEHI",
        "type": "input",
        "description": "Host bus address bit 2 (indexed mode) or address latch enable high (multiplexed mode) used to load the higher address byte in dual phase mode."
      },
      {
        "number": "37",
        "name": "WR/ENB",
        "type": "input",
        "description": "Host bus write strobe or data enable strobe, normally active low, polarity set by HBI_wr_en_polarity_strap."
      },
      {
        "number": "38",
        "name": "RD/RD_WR",
        "type": "input",
        "description": "Host bus read strobe or read/write direction control, normally active low read or read when 1, polarity set by HBI_rd_rdwr_polarity_strap."
      },
      {
        "number": "39",
        "name": "VDDIO",
        "type": "power_in",
        "description": "+1.8 V to +3.3 V variable I/O power."
      },
      {
        "number": "40",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect; must be left unconnected for proper operation."
      },
      {
        "number": "41",
        "name": "A0/D15/AD15",
        "type": "bidirectional",
        "description": "Host bus address bit 0 / data bit 15 (indexed mode) or address/data bit 15 (multiplexed mode); address bit 0 is not used in 16-bit data mode."
      },
      {
        "number": "42",
        "name": "LED3/GPIO3/EEEEN",
        "type": "bidirectional",
        "description": "LED 3 output or GPIO3 depending on LED3 enable, also the Energy Efficient Ethernet enable strap latched at reset (internal pull-up)."
      },
      {
        "number": "43",
        "name": "FIFOSEL",
        "type": "input",
        "description": "Directly selects the Host MAC TX and RX data FIFOs for non-multiplexed address mode."
      },
      {
        "number": "44",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect; must be left unconnected for proper operation."
      },
      {
        "number": "45",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect; must be left unconnected for proper operation."
      },
      {
        "number": "46",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect; must be left unconnected for proper operation."
      },
      {
        "number": "47",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect; must be left unconnected for proper operation."
      },
      {
        "number": "48",
        "name": "D3/AD3/SIO3",
        "type": "bidirectional",
        "description": "Host bus data bit 3 (indexed), address/data bit 3 (multiplexed), or SPI/SQI serial data I/O 3."
      },
      {
        "number": "49",
        "name": "D6/AD6",
        "type": "bidirectional",
        "description": "Host bus data bit 6 (indexed mode) or address/data bit 6 (multiplexed mode); unused in SPI mode."
      },
      {
        "number": "50",
        "name": "VDDIO",
        "type": "power_in",
        "description": "+1.8 V to +3.3 V variable I/O power."
      },
      {
        "number": "51",
        "name": "VDDCR",
        "type": "power_in",
        "description": "+1.2 V digital core supply, from the on-chip regulator unless in regulator off mode."
      },
      {
        "number": "52",
        "name": "D7/AD7",
        "type": "bidirectional",
        "description": "Host bus data bit 7 (indexed mode) or address/data bit 7 (multiplexed mode); unused in SPI mode."
      },
      {
        "number": "53",
        "name": "D8/AD8",
        "type": "bidirectional",
        "description": "Host bus data bit 8 (indexed mode) or address/data bit 8 (multiplexed mode); unused in SPI mode."
      },
      {
        "number": "54",
        "name": "TESTMODE",
        "type": "input",
        "description": "Test mode pin with internal pull-down; must be tied to VSS for proper operation."
      },
      {
        "number": "55",
        "name": "EESDA/TMS",
        "type": "bidirectional",
        "description": "EEPROM I2C serial data input/open-drain output (must be pulled up externally at all times), shared with JTAG test mode select TMS."
      },
      {
        "number": "56",
        "name": "EESCL/TCK",
        "type": "bidirectional",
        "description": "EEPROM I2C clock input/open-drain output (must be pulled up externally at all times), shared with JTAG test clock TCK."
      },
      {
        "number": "57",
        "name": "IRQ",
        "type": "output",
        "description": "Interrupt request output with programmable polarity, source and buffer type (open-drain or push-pull)."
      },
      {
        "number": "58",
        "name": "LED2/GPIO2/E2PSIZE",
        "type": "bidirectional",
        "description": "LED 2 output or GPIO2 depending on LED2 enable, also the EEPROM size strap (low = 1K to 16K bits, high = 32K to 512K bits)."
      },
      {
        "number": "59",
        "name": "LED1/GPIO1/TDI/MNGT1",
        "type": "bidirectional",
        "description": "LED 1 output or GPIO1, shared with JTAG data input TDI and host interface configuration strap 1 (MNGT1) latched at reset."
      },
      {
        "number": "60",
        "name": "VDDIO",
        "type": "power_in",
        "description": "+1.8 V to +3.3 V variable I/O power."
      },
      {
        "number": "61",
        "name": "LED0/GPIO0/TDO/MNGT0",
        "type": "bidirectional",
        "description": "LED 0 output or GPIO0, shared with JTAG data output TDO and host interface configuration strap 0 (MNGT0) latched at reset."
      },
      {
        "number": "62",
        "name": "D4/AD4",
        "type": "bidirectional",
        "description": "Host bus data bit 4 (indexed mode) or address/data bit 4 (multiplexed mode); unused in SPI mode."
      },
      {
        "number": "63",
        "name": "D5/AD5/SCS#",
        "type": "bidirectional",
        "description": "Host bus data bit 5 (indexed), address/data bit 5 (multiplexed), or active-low SPI/SQI slave chip select input."
      },
      {
        "number": "64",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect; must be left unconnected for proper operation."
      },
      {
        "number": "65",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect; must be left unconnected for proper operation."
      },
      {
        "number": "66",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect; must be left unconnected for proper operation."
      },
      {
        "number": "67",
        "name": "VDD33TXRX1",
        "type": "power_in",
        "description": "+3.3 V Port A analog power supply."
      },
      {
        "number": "68",
        "name": "TXNA",
        "type": "bidirectional",
        "description": "Port A twisted pair transmit/receive negative channel 1, or fiber transmit negative."
      },
      {
        "number": "69",
        "name": "TXPA",
        "type": "bidirectional",
        "description": "Port A twisted pair transmit/receive positive channel 1, or fiber transmit positive."
      },
      {
        "number": "70",
        "name": "RXNA",
        "type": "bidirectional",
        "description": "Port A twisted pair transmit/receive negative channel 2, or fiber receive negative."
      },
      {
        "number": "71",
        "name": "RXPA",
        "type": "bidirectional",
        "description": "Port A twisted pair transmit/receive positive channel 2, or fiber receive positive."
      },
      {
        "number": "72",
        "name": "VDD12TX1",
        "type": "power_in",
        "description": "Port A transmitter +1.2 V supply from an external supply or the internal regulator; must be tied to VDD12TX2."
      },
      {
        "number": "73",
        "name": "RBIAS",
        "type": "passive",
        "description": "Internal bias reference; connect an external 12.1 kΩ, 1% resistor to ground."
      },
      {
        "number": "74",
        "name": "VDD33BIAS",
        "type": "power_in",
        "description": "+3.3 V master bias power supply."
      },
      {
        "number": "75",
        "name": "VDD12TX2",
        "type": "power_in",
        "description": "Port B transmitter +1.2 V supply from an external supply or the internal regulator; must be tied to VDD12TX1."
      },
      {
        "number": "76",
        "name": "RXPB",
        "type": "bidirectional",
        "description": "Port B twisted pair transmit/receive positive channel 2, or fiber receive positive."
      },
      {
        "number": "77",
        "name": "RXNB",
        "type": "bidirectional",
        "description": "Port B twisted pair transmit/receive negative channel 2, or fiber receive negative."
      },
      {
        "number": "78",
        "name": "TXPB",
        "type": "bidirectional",
        "description": "Port B twisted pair transmit/receive positive channel 1, or fiber transmit positive."
      },
      {
        "number": "79",
        "name": "TXNB",
        "type": "bidirectional",
        "description": "Port B twisted pair transmit/receive negative channel 1, or fiber transmit negative."
      },
      {
        "number": "80",
        "name": "VDD33TXRX2",
        "type": "power_in",
        "description": "+3.3 V Port B analog power supply."
      }
    ],
    "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: Datasheet pages provided name the package '80-TQFP-EP' and do not show body size; the 12x12 mm hint ; Pin types for analog twisted-pair/fiber pins (TXP/TXN/RXP/RXN A/B) are AIO per datasheet and mapped ; Exposed pad is not numbered in the datasheet; labeled 'EP'.",
          "44/80 pins cited to the wrong page (name found elsewhere): ['1:OSCI@p18', '9:FXSDA/FXLOSA/FXSDENA@p19', '10:FXSDB/FXLOSB/FXSDENB@p20', '12:GPIO7@p24']"
        ],
        "pages_sent": 55,
        "cost_usd": 0.5192,
        "at": "2026-10-31T12:35:41"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/9e0986d309f7f18cca1ae704956b3cb2.pdf",
        "pages": 601,
        "sha256": "19a0b748a26a27ae",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 80,
        "described": 80,
        "cites_pages": true,
        "refuses_to_fabricate": true
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "Microchip Tech",
      "Package": "TQFP-80(12x12)",
      "Category": "Communication Interface Chip/UART/485/232",
      "Pins": "80"
    },
    "appearance": {
      "contacts": {
        "quote": "with the FXSDB pin. As such, the LVPECL levels ensure that the input is greater than 1 V (typ.) and that Signal Detect mode is selected. When TP copper is desired, the Signal Detect input function is ",
        "page": 242,
        "doc": "ds.pdf",
        "material": "copper"
      },
      "version": 1,
      "datasheet_sha256": "19a0b748a26a27aeea1f20c7d9b3197afe5bb7c506c457eb9824a7ba736c826e"
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  "discovery_pitch": "LAN9352 (Microchip Tech) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
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