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Ray Set visibility: public c04e04e 5d ago
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{
  "schema_version": 1,
  "type": "component",
  "slug": "mcp23018t-e",
  "title": "MCP23018T-E",
  "brief": "Microchip Tech I/O Expanders, QFN-24-EP(4x4). 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",
    "mcp23018t-e",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "MCP23018T-E",
    "manufacturer": "Microchip Tech",
    "package": "QFN-24-EP(4x4)",
    "pin_count": 25,
    "category": "Communication Interface Chip/UART/485/232",
    "subcategory": "I/O Expanders",
    "datasheet": "https://ww1.microchip.com/downloads/aemDocuments/documents/APID/ProductDocuments/DataSheets/MCP23018-Data-Sheet-DS20002103.pdf",
    "parts": {
      "symbol": "mcp23018t-e.kicad_sym",
      "footprint": "mcp23018t-e.kicad_mod",
      "model_3d": "mcp23018t-e-hero.glb",
      "model_3d_plain": "mcp23018t-e-etched.glb",
      "model_3d_step": "mcp23018t-e-etched.step",
      "model_3d_step_plain": "mcp23018t-e.step",
      "lbr": "mcp23018t-e.lbr"
    },
    "distributor_links": {
      "lcsc": "C623185"
    },
    "distributor_check": {
      "checked_at": "2026-10-26T19:11:01Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "GPB1",
        "type": "bidirectional",
        "description": "Bidirectional I/O pin with 5.5 volt tolerant input and open-drain output, can be enabled for interrupt on change and/or internal pull-up resistor."
      },
      {
        "number": "2",
        "name": "GPB2",
        "type": "bidirectional",
        "description": "Bidirectional I/O pin with 5.5 volt tolerant input and open-drain output, can be enabled for interrupt on change and/or internal pull-up resistor."
      },
      {
        "number": "3",
        "name": "GPB3",
        "type": "bidirectional",
        "description": "Bidirectional I/O pin with 5.5 volt tolerant input and open-drain output, can be enabled for interrupt on change and/or internal pull-up resistor."
      },
      {
        "number": "4",
        "name": "GPB4",
        "type": "bidirectional",
        "description": "Bidirectional I/O pin with 5.5 volt tolerant input and open-drain output, can be enabled for interrupt on change and/or internal pull-up resistor."
      },
      {
        "number": "5",
        "name": "GPB5",
        "type": "bidirectional",
        "description": "Bidirectional I/O pin with 5.5 volt tolerant input and open-drain output, can be enabled for interrupt on change and/or internal pull-up resistor."
      },
      {
        "number": "6",
        "name": "GPB6",
        "type": "bidirectional",
        "description": "Bidirectional I/O pin with 5.5 volt tolerant input and open-drain output, can be enabled for interrupt on change and/or internal pull-up resistor."
      },
      {
        "number": "7",
        "name": "GPB7",
        "type": "bidirectional",
        "description": "Bidirectional I/O pin with 5.5 volt tolerant input and open-drain output, can be enabled for interrupt on change and/or internal pull-up resistor."
      },
      {
        "number": "8",
        "name": "VDD",
        "type": "power_in",
        "description": "Power supply pin, operating voltage 1.8V to 5.5V."
      },
      {
        "number": "9",
        "name": "SCL",
        "type": "input",
        "description": "Serial clock input for the I2C interface."
      },
      {
        "number": "10",
        "name": "SDA",
        "type": "bidirectional",
        "description": "Serial data I/O for the I2C interface."
      },
      {
        "number": "11",
        "name": "ADDR",
        "type": "input",
        "description": "Hardware address pin that allows up to 8 client devices on the bus."
      },
      {
        "number": "12",
        "name": "RESET",
        "type": "input",
        "description": "Hardware reset input."
      },
      {
        "number": "13",
        "name": "INTB",
        "type": "output",
        "description": "Interrupt output for port B, configurable as active high, active low, or open drain."
      },
      {
        "number": "14",
        "name": "INTA",
        "type": "output",
        "description": "Interrupt output for port A, configurable as active high, active low, or open drain."
      },
      {
        "number": "15",
        "name": "GPA0",
        "type": "bidirectional",
        "description": "Bidirectional I/O pin with 5.5 volt tolerant input and open-drain output, can be enabled for interrupt on change and/or internal pull-up resistor."
      },
      {
        "number": "16",
        "name": "GPA1",
        "type": "bidirectional",
        "description": "Bidirectional I/O pin with 5.5 volt tolerant input and open-drain output, can be enabled for interrupt on change and/or internal pull-up resistor."
      },
      {
        "number": "17",
        "name": "GPA2",
        "type": "bidirectional",
        "description": "Bidirectional I/O pin with 5.5 volt tolerant input and open-drain output, can be enabled for interrupt on change and/or internal pull-up resistor."
      },
      {
        "number": "18",
        "name": "GPA3",
        "type": "bidirectional",
        "description": "Bidirectional I/O pin with 5.5 volt tolerant input and open-drain output, can be enabled for interrupt on change and/or internal pull-up resistor."
      },
      {
        "number": "19",
        "name": "GPA4",
        "type": "bidirectional",
        "description": "Bidirectional I/O pin with 5.5 volt tolerant input and open-drain output, can be enabled for interrupt on change and/or internal pull-up resistor."
      },
      {
        "number": "20",
        "name": "GPA5",
        "type": "bidirectional",
        "description": "Bidirectional I/O pin with 5.5 volt tolerant input and open-drain output, can be enabled for interrupt on change and/or internal pull-up resistor."
      },
      {
        "number": "21",
        "name": "GPA6",
        "type": "bidirectional",
        "description": "Bidirectional I/O pin with 5.5 volt tolerant input and open-drain output, can be enabled for interrupt on change and/or internal pull-up resistor."
      },
      {
        "number": "22",
        "name": "GPA7",
        "type": "bidirectional",
        "description": "Bidirectional I/O pin with 5.5 volt tolerant input and open-drain output, can be enabled for interrupt on change and/or internal pull-up resistor."
      },
      {
        "number": "23",
        "name": "VSS",
        "type": "power_in",
        "description": "Ground pin."
      },
      {
        "number": "24",
        "name": "GPB0",
        "type": "bidirectional",
        "description": "Bidirectional I/O pin with 5.5 volt tolerant input and open-drain output, can be enabled for interrupt on change and/or internal pull-up resistor."
      },
      {
        "number": "25",
        "name": "EP",
        "type": "passive",
        "description": "Exposed thermal pad that should either be left electrically unconnected or connected to VSS."
      }
    ],
    "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 MPN MCP23018T-E has no package suffix. The pinout was taken from the I2C table (Table 1-1, MCP23; The datasheet says the exposed pad should either be left unconnected or connected to VSS. The choice"
        ],
        "pages_sent": 14,
        "cost_usd": 0.136,
        "at": "2026-10-26T19:10:44"
      },
      "datasheet": {
        "url": "https://ww1.microchip.com/downloads/aemDocuments/documents/APID/ProductDocuments/DataSheets/MCP23018-Data-Sheet-DS20002103.pdf",
        "pages": 58,
        "sha256": "e2db995786ddfd12",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 25,
        "described": 25,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "mcp23018t-e.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          4,
          4,
          0.77
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "096fc110543e6d324c5120c2d38e3dca87a389da9b6fac234f1fe40856295ef4",
        "checked": "2026-10-26",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "mcp23018t-e-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          4,
          4,
          0.77
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "1eb0c219837d3f70b38909735128512ebc8fe8ec899427dc557f62bcf918ef3c",
        "checked": "2026-10-26",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Microchip Tech",
      "Package": "QFN-24-EP(4x4)",
      "Category": "Communication Interface Chip/UART/485/232",
      "Pins": "25"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "e2db995786ddfd12db2d243cb35131d951ef852e3838353073d16f8767eaadba",
      "rows": [
        {
          "name": "Supply Voltage",
          "symbol": "VDD",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 1.8,
          "typ": null,
          "max": 5.5,
          "conditions": "",
          "source_page": 32,
          "source": "datasheet"
        },
        {
          "name": "Operating temperature (E range)",
          "symbol": "TA",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 125,
          "conditions": "1.8V ≤ VDD ≤ 5.5V",
          "source_page": 32,
          "source": "datasheet"
        },
        {
          "name": "Ambient temperature under bias",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 125,
          "conditions": "",
          "source_page": 31,
          "source": "datasheet"
        },
        {
          "name": "Storage temperature",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 31,
          "source": "datasheet"
        },
        {
          "name": "Voltage on VDD with respect to VSS",
          "symbol": "VDD",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 7,
          "conditions": "",
          "source_page": 31,
          "source": "datasheet"
        },
        {
          "name": "Voltage on RESET with respect to VSS",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 14,
          "conditions": "",
          "source_page": 31,
          "source": "datasheet"
        },
        {
          "name": "Voltage on GPIO pins",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.6,
          "typ": null,
          "max": 5.5,
          "conditions": "",
          "source_page": 31,
          "source": "datasheet"
        },
        {
          "name": "Maximum current out of VSS pin",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 400,
          "conditions": "",
          "source_page": 31,
          "source": "datasheet"
        },
        {
          "name": "Maximum current into VDD pin",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 125,
          "conditions": "",
          "source_page": 31,
          "source": "datasheet"
        },
        {
          "name": "Input clamp current",
          "symbol": "IIK",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 20,
          "conditions": "VI < 0 or VI > VDD",
          "source_page": 31,
          "source": "datasheet"
        },
        {
          "name": "Output clamp current",
          "symbol": "IOK",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 20,
          "conditions": "VO < 0 or VO > VDD",
          "source_page": 31,
          "source": "datasheet"
        },
        {
          "name": "Maximum output current sunk by any Output pin",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 25,
          "conditions": "",
          "source_page": 31,
          "source": "datasheet"
        },
        {
          "name": "Maximum output current sourced by any Output pin",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 25,
          "conditions": "",
          "source_page": 31,
          "source": "datasheet"
        },
        {
          "name": "VDD Rise Rate to Ensure Power-on Reset",
          "symbol": "SVDD",
          "kind": "electrical",
          "unit": "V/ms",
          "min": 0.05,
          "typ": null,
          "max": null,
          "conditions": "Design guidance only. Not tested.",
          "source_page": 32,
          "source": "datasheet"
        },
        {
          "name": "Supply Current",
          "symbol": "IDD",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 1,
          "conditions": "SCL/SCK = 1 MHz",
          "source_page": 32,
          "source": "datasheet"
        },
        {
          "name": "Standby (Idle) current",
          "symbol": "IDDS",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": null,
          "max": 1,
          "conditions": "–40°C ≤ TA ≤ +85°C",
          "source_page": 32,
          "source": "datasheet"
        },
        {
          "name": "Standby (Idle) current",
          "symbol": "IDDS",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": null,
          "max": 6,
          "conditions": "+85°C ≤ TA ≤ +125°C",
          "source_page": 32,
          "source": "datasheet"
        },
        {
          "name": "Input High-Voltage GPIO",
          "symbol": "VIH",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 5.5,
          "conditions": "GPIO",
          "source_page": 32,
          "source": "datasheet"
        },
        {
          "name": "Input Leakage Current, I/O port pins",
          "symbol": "IIL",
          "kind": "electrical",
          "unit": "µA",
          "min": -1,
          "typ": null,
          "max": 1,
          "conditions": "VSS ≤ VPIN ≤ VDD",
          "source_page": 32,
          "source": "datasheet"
        },
        {
          "name": "Output Leakage Current, I/O port pins",
          "symbol": "ILO",
          "kind": "electrical",
          "unit": "µA",
          "min": -1,
          "typ": null,
          "max": 1,
          "conditions": "VSS ≤ VPIN ≤ VDD",
          "source_page": 32,
          "source": "datasheet"
        },
        {
          "name": "Output Low-Voltage GPIO",
          "symbol": "VOL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.6,
          "conditions": "IOL = 8.5 mA, VDD = 4.5V (open-drain)",
          "source_page": 32,
          "source": "datasheet"
        },
        {
          "name": "Output Low-Voltage INT",
          "symbol": "VOL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.6,
          "conditions": "IOL = 1.6 mA, VDD = 4.5V",
          "source_page": 32,
          "source": "datasheet"
        },
        {
          "name": "Output Low-Voltage SO, SDA",
          "symbol": "VOL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.6,
          "conditions": "IOL = 3.0 mA, VDD = 1.8V",
          "source_page": 32,
          "source": "datasheet"
        },
        {
          "name": "Output Low-Voltage SDA",
          "symbol": "VOL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.8,
          "conditions": "IOL = 3.0 mA, VDD = 4.5V",
          "source_page": 32,
          "source": "datasheet"
        },
        {
          "name": "Capacitive Loading GPIO, SO, INT",
          "symbol": "CIO",
          "kind": "electrical",
          "unit": "pF",
          "min": null,
          "typ": null,
          "max": 50,
          "conditions": "",
          "source_page": 32,
          "source": "datasheet"
        },
        {
          "name": "Capacitive Loading SDA",
          "symbol": "CB",
          "kind": "electrical",
          "unit": "pF",
          "min": null,
          "typ": null,
          "max": 400,
          "conditions": "",
          "source_page": 32,
          "source": "datasheet"
        },
        {
          "name": "RESET Pulse Width (low)",
          "symbol": "TRSTL",
          "kind": "timing",
          "unit": "µs",
          "min": 1,
          "typ": null,
          "max": null,
          "conditions": "VDD = 5.0V",
          "source_page": 33,
          "source": "datasheet"
        },
        {
          "name": "Output Hi-impedance from RESET Low",
          "symbol": "TioZ",
          "kind": "timing",
          "unit": "µs",
          "min": null,
          "typ": null,
          "max": 1,
          "conditions": "",
          "source_page": 33,
          "source": "datasheet"
        },
        {
          "name": "Serial data to output valid",
          "symbol": "tGPOV",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": null,
          "max": 500,
          "conditions": "",
          "source_page": 34,
          "source": "datasheet"
        },
        {
          "name": "Interrupt pin disable time",
          "symbol": "tINTD",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": null,
          "max": 600,
          "conditions": "",
          "source_page": 34,
          "source": "datasheet"
        },
        {
          "name": "IOC event to INT active",
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