PCF8574P

{
  "slug": "pcf8574p",
  "version": "0.1.0",
  "type": "component",
  "description": "HGSEMI I/O Expanders, DIP-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "interface",
    "pcf8574p",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "pcf8574p.kicad_sym",
    "pcf8574p.kicad_mod",
    "pcf8574p.glb",
    "pcf8574p.step",
    "pcf8574p.lbr",
    "docs/hero.png",
    "docs/pcf8574p-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "pcf8574p-hero.glb",
    "pcf8574p-hero.overlay.json",
    "pcf8574p-etched.glb"
  ],
  "component": {
    "mpn": "PCF8574P",
    "manufacturer": "HGSEMI",
    "package": "DIP-16",
    "pin_count": 16,
    "category": "Interface",
    "subcategory": "I/O Expanders",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8758163432698982400",
    "parts": {
      "symbol": "pcf8574p.kicad_sym",
      "footprint": "pcf8574p.kicad_mod",
      "model_3d": "pcf8574p-hero.glb",
      "model_3d_plain": "pcf8574p-etched.glb",
      "model_3d_step": "pcf8574p-etched.step",
      "model_3d_step_plain": "pcf8574p.step",
      "lbr": "pcf8574p.lbr"
    },
    "distributor_links": {
      "lcsc": "C398073"
    },
    "distributor_check": {
      "checked_at": "2026-10-15T18:07:41Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "A0",
        "type": "input",
        "description": "Hardware address input 0, one of three pins that set the device's I2C slave address (up to 8 PCF8574 devices on one bus)."
      },
      {
        "number": "2",
        "name": "A1",
        "type": "input",
        "description": "Hardware address input 1, one of three pins that set the device's I2C slave address (up to 8 PCF8574 devices on one bus)."
      },
      {
        "number": "3",
        "name": "A2",
        "type": "input",
        "description": "Hardware address input 2, one of three pins that set the device's I2C slave address (up to 8 PCF8574 devices on one bus)."
      },
      {
        "number": "4",
        "name": "P0",
        "type": "bidirectional",
        "description": "Quasi-bidirectional I/O 0 with latched output; LOW-level output current IOL is 10 mA min to 25 mA max at VOL = 1 V with VDD = 5 V, and it is HIGH at power-on."
      },
      {
        "number": "5",
        "name": "P1",
        "type": "bidirectional",
        "description": "Quasi-bidirectional I/O 1 with latched output; LOW-level output current IOL is 10 mA min to 25 mA max at VOL = 1 V with VDD = 5 V, and it is HIGH at power-on."
      },
      {
        "number": "6",
        "name": "P2",
        "type": "bidirectional",
        "description": "Quasi-bidirectional I/O 2 with latched output; LOW-level output current IOL is 10 mA min to 25 mA max at VOL = 1 V with VDD = 5 V, and it is HIGH at power-on."
      },
      {
        "number": "7",
        "name": "P3",
        "type": "bidirectional",
        "description": "Quasi-bidirectional I/O 3 with latched output; LOW-level output current IOL is 10 mA min to 25 mA max at VOL = 1 V with VDD = 5 V, and it is HIGH at power-on."
      },
      {
        "number": "8",
        "name": "VSS",
        "type": "power_in",
        "description": "Supply ground, 0 V reference for the device."
      },
      {
        "number": "9",
        "name": "P4",
        "type": "bidirectional",
        "description": "Quasi-bidirectional I/O 4 with latched output; LOW-level output current IOL is 10 mA min to 25 mA max at VOL = 1 V with VDD = 5 V, and it is HIGH at power-on."
      },
      {
        "number": "10",
        "name": "P5",
        "type": "bidirectional",
        "description": "Quasi-bidirectional I/O 5 with latched output; LOW-level output current IOL is 10 mA min to 25 mA max at VOL = 1 V with VDD = 5 V, and it is HIGH at power-on."
      },
      {
        "number": "11",
        "name": "P6",
        "type": "bidirectional",
        "description": "Quasi-bidirectional I/O 6 with latched output; LOW-level output current IOL is 10 mA min to 25 mA max at VOL = 1 V with VDD = 5 V, and it is HIGH at power-on."
      },
      {
        "number": "12",
        "name": "P7",
        "type": "bidirectional",
        "description": "Quasi-bidirectional I/O 7 with latched output; LOW-level output current IOL is 10 mA min to 25 mA max at VOL = 1 V with VDD = 5 V, and it is HIGH at power-on."
      },
      {
        "number": "13",
        "name": "INT",
        "type": "output",
        "description": "Open-drain interrupt output, active LOW, signalling a change on the port inputs to the microcontroller; minimum IOL is 1.6 mA at VOL = 0.4 V."
      },
      {
        "number": "14",
        "name": "SCL",
        "type": "input",
        "description": "I2C-bus serial clock line, which must be pulled up to the positive supply and runs at up to 100 kHz."
      },
      {
        "number": "15",
        "name": "SDA",
        "type": "bidirectional",
        "description": "I2C-bus serial data line, which must be pulled up to the positive supply and carries data in both directions."
      },
      {
        "number": "16",
        "name": "VDD",
        "type": "power_in",
        "description": "Supply voltage, specified from 2.5 V to 6.0 V."
      }
    ],
    "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 datasheet pin table gives signal names and functions but no ERC electrical types. Types were ass; The ordering table lists PCF8574P as DIP-16 (marking PCF8574). The pin numbers come from the DIP-16/"
        ],
        "pages_sent": 18,
        "cost_usd": 0.0531,
        "at": "2026-10-15T18:07:23"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8758163432698982400",
        "pages": 18,
        "sha256": "b4f2128e4d380a5d",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 16,
        "described": 16,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "pcf8574p.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "body on z = 0, through-hole leads below",
        "extents_mm": [
          7.874,
          19.177,
          6.98
        ],
        "zmin_mm": -3.3,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "17a30b1f0ab3fd5384a1231e3c63c394888d5b952c542a8c189e023ed3467464",
        "checked": "2026-10-15",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "pcf8574p-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "body on z = 0, through-hole leads below",
        "extents_mm": [
          7.874,
          19.177,
          6.98
        ],
        "zmin_mm": -3.3,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "110f5e0954f47ce74407c6b5abe76e5cb1d8bd14de1e55dfd5530c0ffa826f01",
        "checked": "2026-10-15",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}