TCA9539PWR

{
  "schema_version": 1,
  "type": "component",
  "slug": "tca9539pwr",
  "title": "TCA9539PWR",
  "brief": "Texas Instruments I/O Expanders, TSSOP-24. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.2.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "interface",
    "tca9539pwr"
  ],
  "component": {
    "mpn": "TCA9539PWR",
    "manufacturer": "Texas Instruments",
    "package": "TSSOP-24",
    "pin_count": 24,
    "category": "Interface",
    "subcategory": "I/O Expanders",
    "datasheet": "https://www.ti.com/lit/ds/symlink/tca9539.pdf",
    "parts": {
      "symbol": "tca9539pwr.kicad_sym",
      "footprint": "tca9539pwr.kicad_mod",
      "model_3d": "tca9539pwr-etched.glb",
      "model_3d_plain": "tca9539pwr.glb",
      "model_3d_step": "tca9539pwr-etched.step",
      "model_3d_step_plain": "tca9539pwr.step",
      "lbr": "tca9539pwr.lbr"
    },
    "distributor_links": {
      "lcsc": "C131972"
    },
    "pins": [
      {
        "number": "1",
        "name": "INT",
        "type": "output",
        "description": "Interrupt open-drain output. Asserted low whenever an input port pin changes state. Connect to VCC through a pull-up resistor. IOL up to 6 mA (Tj <= 85 C)."
      },
      {
        "number": "2",
        "name": "A1",
        "type": "input",
        "description": "I2C hardware address input bit 1. Tie directly to VCC or GND to select one of four I2C addresses. VIH >= 0.7*VCC; VIL <= 0.3*VCC."
      },
      {
        "number": "3",
        "name": "RESET",
        "type": "input",
        "description": "Active-low hardware reset input. Drive low to reset device to default register state. Tie to VCC through a pull-up resistor if unused."
      },
      {
        "number": "4",
        "name": "P00",
        "type": "bidirectional",
        "description": "Port 0 GPIO bit 0. Push-pull I/O; configured as input at power-on. Latched high-current drive suitable for driving LEDs directly (IOL up to 25 mA at Tj <= 65 C)."
      },
      {
        "number": "5",
        "name": "P01",
        "type": "bidirectional",
        "description": "Port 0 GPIO bit 1. Push-pull I/O; input at power-on."
      },
      {
        "number": "6",
        "name": "P02",
        "type": "bidirectional",
        "description": "Port 0 GPIO bit 2. Push-pull I/O; input at power-on."
      },
      {
        "number": "7",
        "name": "P03",
        "type": "bidirectional",
        "description": "Port 0 GPIO bit 3. Push-pull I/O; input at power-on."
      },
      {
        "number": "8",
        "name": "P04",
        "type": "bidirectional",
        "description": "Port 0 GPIO bit 4. Push-pull I/O; input at power-on."
      },
      {
        "number": "9",
        "name": "P05",
        "type": "bidirectional",
        "description": "Port 0 GPIO bit 5. Push-pull I/O; input at power-on."
      },
      {
        "number": "10",
        "name": "P06",
        "type": "bidirectional",
        "description": "Port 0 GPIO bit 6. Push-pull I/O; input at power-on."
      },
      {
        "number": "11",
        "name": "P07",
        "type": "bidirectional",
        "description": "Port 0 GPIO bit 7. Push-pull I/O; input at power-on."
      },
      {
        "number": "12",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference / device return."
      },
      {
        "number": "13",
        "name": "P10",
        "type": "bidirectional",
        "description": "Port 1 GPIO bit 0. Push-pull I/O; input at power-on."
      },
      {
        "number": "14",
        "name": "P11",
        "type": "bidirectional",
        "description": "Port 1 GPIO bit 1. Push-pull I/O; input at power-on."
      },
      {
        "number": "15",
        "name": "P12",
        "type": "bidirectional",
        "description": "Port 1 GPIO bit 2. Push-pull I/O; input at power-on."
      },
      {
        "number": "16",
        "name": "P13",
        "type": "bidirectional",
        "description": "Port 1 GPIO bit 3. Push-pull I/O; input at power-on."
      },
      {
        "number": "17",
        "name": "P14",
        "type": "bidirectional",
        "description": "Port 1 GPIO bit 4. Push-pull I/O; input at power-on."
      },
      {
        "number": "18",
        "name": "P15",
        "type": "bidirectional",
        "description": "Port 1 GPIO bit 5. Push-pull I/O; input at power-on."
      },
      {
        "number": "19",
        "name": "P16",
        "type": "bidirectional",
        "description": "Port 1 GPIO bit 6. Push-pull I/O; input at power-on."
      },
      {
        "number": "20",
        "name": "P17",
        "type": "bidirectional",
        "description": "Port 1 GPIO bit 7. Push-pull I/O; input at power-on."
      },
      {
        "number": "21",
        "name": "A0",
        "type": "input",
        "description": "I2C hardware address input bit 0. Tie directly to VCC or GND to select I2C address."
      },
      {
        "number": "22",
        "name": "SCL",
        "type": "input",
        "description": "I2C/SMBus serial clock input. Requires an external pull-up to VCC. Supports 100 kHz and 400 kHz operation; 5 V tolerant."
      },
      {
        "number": "23",
        "name": "SDA",
        "type": "bidirectional",
        "description": "I2C/SMBus serial data line (open-drain). Requires an external pull-up to VCC. IOL up to 6 mA (Tj <= 85 C); 5 V tolerant."
      },
      {
        "number": "24",
        "name": "VCC",
        "type": "power_in",
        "description": "Supply voltage input, 1.65 V to 5.5 V. Bypass locally with a decoupling capacitor to GND."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://www.ti.com/lit/ds/symlink/tca9539.pdf",
        "pages": 49,
        "sha256": "dbd074d61fa90111",
        "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"
    },
    "pin1": {
      "pad": "1",
      "at": [
        -2.8625,
        -3.575
      ],
      "corner": "top-left",
      "source": "silk-marker",
      "derived_from": "TSSOP-24_4.4x7.8mm_P0.65mm@sha256:951159bb3a87997b",
      "mark": "drawn"
    },
    "models_3d": [
      {
        "file": "tca9539pwr.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.4,
          7.8,
          0.97
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "706322f42d9793ebf28d5b80100a68bfa8769998a00b78acadf7af937fc1454f",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "tca9539pwr-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.4,
          7.8,
          0.97
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "e83752c3a4772bad1a8078c015d3733acffb1bb118280de1bdec5c5be04b0f22",
        "checked": "2026-10-26",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "TSSOP-24",
      "Category": "Interface",
      "Pins": "24"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "tca9539pwr"
  ],
  "discovery_pitch": "TCA9539PWR (Texas Instruments) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "tca9539pwr.kicad_sym",
    "tca9539pwr.kicad_mod",
    "tca9539pwr.glb",
    "tca9539pwr.step",
    "tca9539pwr-etched.step",
    "tca9539pwr.lbr",
    "docs/hero.png",
    "docs/tca9539pwr-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "visibility": {
    "public": true
  },
  "variants": [
    {
      "mpn": "TCA9539PWR",
      "kind": "packaging"
    },
    {
      "mpn": "TCA9539PWRRTW",
      "kind": "packaging"
    },
    {
      "mpn": "TCA9539PWRRTWR",
      "kind": "packaging"
    },
    {
      "mpn": "TCA9539PWRRGE",
      "kind": "packaging"
    },
    {
      "mpn": "TCA9539PWRRGER",
      "kind": "packaging"
    }
  ],
  "updated_at": "2026-09-25T09:26:10.945Z"
}