PCA9555DBR

{
  "slug": "pca9555dbr",
  "version": "0.1.0",
  "type": "component",
  "description": "Texas Instruments I/O Expanders, SSOP-24-208mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "interface ics",
    "pca9555dbr",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "pca9555dbr.kicad_sym",
    "pca9555dbr.kicad_mod",
    "pca9555dbr.glb",
    "pca9555dbr.step",
    "pca9555dbr.lbr",
    "docs/hero.png",
    "docs/pca9555dbr-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "pca9555dbr-hero.glb",
    "pca9555dbr-hero.overlay.json",
    "pca9555dbr-etched.glb"
  ],
  "component": {
    "mpn": "PCA9555DBR",
    "manufacturer": "Texas Instruments",
    "package": "SSOP-24-208mil",
    "pin_count": 24,
    "category": "Interface ICs",
    "subcategory": "I/O Expanders",
    "datasheet": "https://www.ti.com/lit/ds/symlink/pca9555dbr.pdf",
    "parts": {
      "symbol": "pca9555dbr.kicad_sym",
      "footprint": "pca9555dbr.kicad_mod",
      "model_3d": "pca9555dbr-hero.glb",
      "model_3d_plain": "pca9555dbr-etched.glb",
      "model_3d_step": "pca9555dbr-etched.step",
      "model_3d_step_plain": "pca9555dbr.step",
      "lbr": "pca9555dbr.lbr"
    },
    "distributor_links": {
      "lcsc": "C45293"
    },
    "distributor_check": {
      "checked_at": "2026-10-22T21:59:10Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "INT",
        "type": "output",
        "description": "Open-drain active-low interrupt output; connect to VCC through a pullup resistor."
      },
      {
        "number": "2",
        "name": "A1",
        "type": "input",
        "description": "Address input 1; connect directly to VCC or ground."
      },
      {
        "number": "3",
        "name": "A2",
        "type": "input",
        "description": "Address input 2; connect directly to VCC or ground."
      },
      {
        "number": "4",
        "name": "P00",
        "type": "bidirectional",
        "description": "Port 0 bit 0 input/output with push-pull design structure."
      },
      {
        "number": "5",
        "name": "P01",
        "type": "bidirectional",
        "description": "Port 0 bit 1 input/output with push-pull design structure."
      },
      {
        "number": "6",
        "name": "P02",
        "type": "bidirectional",
        "description": "Port 0 bit 2 input/output with push-pull design structure."
      },
      {
        "number": "7",
        "name": "P03",
        "type": "bidirectional",
        "description": "Port 0 bit 3 input/output with push-pull design structure."
      },
      {
        "number": "8",
        "name": "P04",
        "type": "bidirectional",
        "description": "Port 0 bit 4 input/output with push-pull design structure."
      },
      {
        "number": "9",
        "name": "P05",
        "type": "bidirectional",
        "description": "Port 0 bit 5 input/output with push-pull design structure."
      },
      {
        "number": "10",
        "name": "P06",
        "type": "bidirectional",
        "description": "Port 0 bit 6 input/output with push-pull design structure."
      },
      {
        "number": "11",
        "name": "P07",
        "type": "bidirectional",
        "description": "Port 0 bit 7 input/output with push-pull design structure."
      },
      {
        "number": "12",
        "name": "GND",
        "type": "power_in",
        "description": "Ground."
      },
      {
        "number": "13",
        "name": "P10",
        "type": "bidirectional",
        "description": "Port 1 bit 0 input/output with push-pull design structure."
      },
      {
        "number": "14",
        "name": "P11",
        "type": "bidirectional",
        "description": "Port 1 bit 1 input/output with push-pull design structure."
      },
      {
        "number": "15",
        "name": "P12",
        "type": "bidirectional",
        "description": "Port 1 bit 2 input/output with push-pull design structure."
      },
      {
        "number": "16",
        "name": "P13",
        "type": "bidirectional",
        "description": "Port 1 bit 3 input/output with push-pull design structure."
      },
      {
        "number": "17",
        "name": "P14",
        "type": "bidirectional",
        "description": "Port 1 bit 4 input/output with push-pull design structure."
      },
      {
        "number": "18",
        "name": "P15",
        "type": "bidirectional",
        "description": "Port 1 bit 5 input/output with push-pull design structure."
      },
      {
        "number": "19",
        "name": "P16",
        "type": "bidirectional",
        "description": "Port 1 bit 6 input/output with push-pull design structure."
      },
      {
        "number": "20",
        "name": "P17",
        "type": "bidirectional",
        "description": "Port 1 bit 7 input/output with push-pull design structure."
      },
      {
        "number": "21",
        "name": "A0",
        "type": "input",
        "description": "Address input 0; connect directly to VCC or ground."
      },
      {
        "number": "22",
        "name": "SCL",
        "type": "input",
        "description": "I2C serial clock bus; connect to VCC through a pullup resistor."
      },
      {
        "number": "23",
        "name": "SDA",
        "type": "bidirectional",
        "description": "I2C serial data bus; connect to VCC through a pullup resistor."
      },
      {
        "number": "24",
        "name": "VCC",
        "type": "power_in",
        "description": "Supply voltage, 2.3 V to 5.5 V recommended operating range."
      }
    ],
    "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": [],
        "pages_sent": 17,
        "cost_usd": 0.0594,
        "at": "2026-10-22T21:58:51"
      },
      "datasheet": {
        "url": "https://www.ti.com/lit/ds/symlink/pca9555dbr.pdf",
        "pages": 42,
        "sha256": "2b12136d10071504",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 24,
        "described": 24,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "pca9555dbr.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          7.8,
          8.2,
          2.1
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "77dd0a1fc7e70e9eda1bfde9dde937dc6e391803cff9978790523c850c85a21d",
        "checked": "2026-10-22",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "pca9555dbr-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          7.8,
          8.2,
          2.1
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "cec6fa4b6e0f769b05a99af7142514d1658006369030c186c6a7a77efd80675b",
        "checked": "2026-10-22",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}