LP3943ISQX

{
  "slug": "lp3943isqx",
  "version": "0.1.0",
  "type": "component",
  "description": "Texas Instruments LED Drivers, WQFN-24-EP(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "nixie tube driver-led driver",
    "lp3943isqx",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "lp3943isqx.kicad_sym",
    "lp3943isqx.kicad_mod",
    "lp3943isqx.glb",
    "lp3943isqx.step",
    "lp3943isqx.lbr",
    "docs/hero.png",
    "docs/lp3943isqx-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "lp3943isqx-hero.glb",
    "lp3943isqx-hero.overlay.json"
  ],
  "component": {
    "mpn": "LP3943ISQX",
    "manufacturer": "Texas Instruments",
    "package": "WQFN-24-EP(4x4)",
    "pin_count": 25,
    "category": "Nixie Tube Driver/LED Driver",
    "subcategory": "LED Drivers",
    "datasheet": "https://www.ti.com/cn/lit/gpn/lp3943",
    "parts": {
      "symbol": "lp3943isqx.kicad_sym",
      "footprint": "lp3943isqx.kicad_mod",
      "model_3d": "lp3943isqx-hero.glb",
      "model_3d_plain": "lp3943isqx.glb",
      "model_3d_step": "lp3943isqx-etched.step",
      "model_3d_step_plain": "lp3943isqx.step",
      "lbr": "lp3943isqx.lbr"
    },
    "distributor_links": {
      "lcsc": 701956,
      "digikey": "LP3943ISQX-ND",
      "mouser": "926-LP3943ISQX"
    },
    "distributor_check": {
      "checked_at": "2026-10-06T03:46:41Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "LP3943ISQX-ND",
        "status": "found",
        "lifecycle": "Obsolete"
      },
      "mouser": {
        "pn": "926-LP3943ISQX",
        "status": "found",
        "lifecycle": "Obsolete"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "LED0",
        "type": "output",
        "description": "Open-drain LED sink driver output; 25mA maximum per pin, 200mA per package maximum"
      },
      {
        "number": "2",
        "name": "LED1",
        "type": "output",
        "description": "Open-drain LED sink driver output; 25mA maximum per pin, 200mA per package maximum"
      },
      {
        "number": "3",
        "name": "LED2",
        "type": "output",
        "description": "Open-drain LED sink driver output; 25mA maximum per pin, 200mA per package maximum"
      },
      {
        "number": "4",
        "name": "LED3",
        "type": "output",
        "description": "Open-drain LED sink driver output; 25mA maximum per pin, 200mA per package maximum"
      },
      {
        "number": "5",
        "name": "LED4",
        "type": "output",
        "description": "Open-drain LED sink driver output; 25mA maximum per pin, 200mA per package maximum"
      },
      {
        "number": "6",
        "name": "LED5",
        "type": "output",
        "description": "Open-drain LED sink driver output; 25mA maximum per pin, 200mA per package maximum"
      },
      {
        "number": "7",
        "name": "LED6",
        "type": "output",
        "description": "Open-drain LED sink driver output; 25mA maximum per pin, 200mA per package maximum"
      },
      {
        "number": "8",
        "name": "LED7",
        "type": "output",
        "description": "Open-drain LED sink driver output; 25mA maximum per pin, 200mA per package maximum"
      },
      {
        "number": "9",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference"
      },
      {
        "number": "10",
        "name": "LED8",
        "type": "output",
        "description": "Open-drain LED sink driver output; 25mA maximum per pin, 200mA per package maximum"
      },
      {
        "number": "11",
        "name": "LED9",
        "type": "output",
        "description": "Open-drain LED sink driver output; 25mA maximum per pin, 200mA per package maximum"
      },
      {
        "number": "12",
        "name": "LED10",
        "type": "output",
        "description": "Open-drain LED sink driver output; 25mA maximum per pin, 200mA per package maximum"
      },
      {
        "number": "13",
        "name": "LED11",
        "type": "output",
        "description": "Open-drain LED sink driver output; 25mA maximum per pin, 200mA per package maximum"
      },
      {
        "number": "14",
        "name": "LED12",
        "type": "output",
        "description": "Open-drain LED sink driver output; 25mA maximum per pin, 200mA per package maximum"
      },
      {
        "number": "15",
        "name": "LED13",
        "type": "output",
        "description": "Open-drain LED sink driver output; 25mA maximum per pin, 200mA per package maximum"
      },
      {
        "number": "16",
        "name": "LED14",
        "type": "output",
        "description": "Open-drain LED sink driver output; 25mA maximum per pin, 200mA per package maximum"
      },
      {
        "number": "17",
        "name": "LED15",
        "type": "output",
        "description": "Open-drain LED sink driver output; 25mA maximum per pin, 200mA per package maximum"
      },
      {
        "number": "18",
        "name": "RST",
        "type": "input",
        "description": "Active-low reset input; hold LOW for minimum 10ns pulse width"
      },
      {
        "number": "19",
        "name": "SCL",
        "type": "input",
        "description": "I2C clock input; 400kHz maximum frequency"
      },
      {
        "number": "20",
        "name": "SDA",
        "type": "bidirectional",
        "description": "I2C serial data line; open-drain output capable for SMBus/I2C interface"
      },
      {
        "number": "21",
        "name": "VDD",
        "type": "power_in",
        "description": "Power supply input; 2.3V to 5.5V recommended operating range"
      },
      {
        "number": "22",
        "name": "A0",
        "type": "input",
        "description": "I2C slave address input bit 0 for device address selection"
      },
      {
        "number": "23",
        "name": "A1",
        "type": "input",
        "description": "I2C slave address input bit 1 for device address selection"
      },
      {
        "number": "24",
        "name": "A2",
        "type": "input",
        "description": "I2C slave address input bit 2 for device address selection"
      },
      {
        "number": "25",
        "name": "Exposed Pad",
        "type": "passive",
        "description": "Exposed pad (from the footprint; not named in the datasheet pin table)."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-haiku-4-5-20251001",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: Exposed thermal pad mentioned in Pin Functions table note on page 3 but not assigned a pin number in",
          "exposed pad 25 added from the footprint"
        ],
        "pages_sent": 26,
        "cost_usd": 0.1957,
        "at": "2026-10-06T03:46:26"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/lp3943",
        "pages": 26,
        "sha256": "d6d0a0999dfdfaff",
        "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"
    }
  }
}