SP721APP

{
  "slug": "sp721app",
  "version": "0.1.0",
  "type": "component",
  "description": "Littelfuse Electrostatic And Surge Protection (TVS/ESD), PDIP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "circuit protection",
    "sp721app",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "sp721app.kicad_sym",
    "sp721app.kicad_mod",
    "sp721app.glb",
    "sp721app.step",
    "sp721app.lbr",
    "docs/hero.png",
    "docs/sp721app-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "sp721app-hero.glb",
    "sp721app-hero.overlay.json",
    "sp721app-etched.glb"
  ],
  "component": {
    "mpn": "SP721APP",
    "manufacturer": "Littelfuse",
    "package": "PDIP-8",
    "pin_count": 8,
    "category": "Circuit Protection",
    "subcategory": "Electrostatic And Surge Protection (TVS/ESD)",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/9a218b5992648aff3cfb0432817142fd.pdf",
    "parts": {
      "symbol": "sp721app.kicad_sym",
      "footprint": "sp721app.kicad_mod",
      "model_3d": "sp721app-hero.glb",
      "model_3d_plain": "sp721app-etched.glb",
      "model_3d_step": "sp721app-etched.step",
      "model_3d_step_plain": "sp721app.step",
      "lbr": "sp721app.lbr"
    },
    "distributor_links": {
      "lcsc": "C5373324",
      "digikey": "F2720-ND",
      "mouser": "576-SP721APP"
    },
    "distributor_check": {
      "checked_at": "2026-10-29T00:21:46Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "F2720-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "576-SP721APP",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "IN",
        "type": "input",
        "description": "Signal input protected by SCR/diode structures that clamp to V+ when the input exceeds one VBE above V+ and to V- when it falls one VBE below V-."
      },
      {
        "number": "2",
        "name": "IN",
        "type": "input",
        "description": "Signal input protected by SCR/diode structures that clamp to V+ when the input exceeds one VBE above V+ and to V- when it falls one VBE below V-."
      },
      {
        "number": "3",
        "name": "IN",
        "type": "input",
        "description": "Signal input protected by SCR/diode structures that clamp to V+ when the input exceeds one VBE above V+ and to V- when it falls one VBE below V-."
      },
      {
        "number": "4",
        "name": "V-",
        "type": "power_in",
        "description": "Negative supply pin that sets the lower SCR trigger threshold, one VBE diode drop below V-; operating supply range (V+)-(V-) is 2 to 30 V."
      },
      {
        "number": "5",
        "name": "IN",
        "type": "input",
        "description": "Signal input protected by SCR/diode structures that clamp to V+ when the input exceeds one VBE above V+ and to V- when it falls one VBE below V-."
      },
      {
        "number": "6",
        "name": "IN",
        "type": "input",
        "description": "Signal input protected by SCR/diode structures that clamp to V+ when the input exceeds one VBE above V+ and to V- when it falls one VBE below V-."
      },
      {
        "number": "7",
        "name": "IN",
        "type": "input",
        "description": "Signal input protected by SCR/diode structures that clamp to V+ when the input exceeds one VBE above V+ and to V- when it falls one VBE below V-."
      },
      {
        "number": "8",
        "name": "V+",
        "type": "power_in",
        "description": "Positive supply pin that sets the upper SCR trigger threshold, one VBE diode drop above V+; absolute maximum continuous supply (V+)-(V-) is +35 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 pin-number layout in the page 1 pinout figure is garbled in the extracted text. Pin 4 = V- and p; The datasheet does not give individual per-pin functions for the six IN pins, so they share one desc; Supply limits (operating 2 to 30 V, absolute maximum +35 V) come from page 2 and apply to the whole "
        ],
        "pages_sent": 6,
        "cost_usd": 0.0453,
        "at": "2026-10-29T00:21:38"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/9a218b5992648aff3cfb0432817142fd.pdf",
        "pages": 6,
        "sha256": "eb5e983ff1c51866",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 8,
        "described": 8,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "sp721app.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,
          9.27,
          6.98
        ],
        "zmin_mm": -3.3,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "4a377a56a8d9e9c0b86c095ef9ecc1869ac19e7f5069a3247b294250bf4f235d",
        "checked": "2026-10-29",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "sp721app-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,
          9.27,
          6.98
        ],
        "zmin_mm": -3.3,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "4daa545342d896a9af1b681642d17a8bfd62445563a602cfe2c49056d9419798",
        "checked": "2026-10-29",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ],
    "package_dims": {
      "package_code": "PDIP",
      "source_page": 5,
      "D": {
        "nom_mm": 9.588,
        "range_mm": [
          9.017,
          10.16
        ]
      },
      "E1": {
        "nom_mm": 6.604,
        "range_mm": [
          6.096,
          7.112
        ]
      },
      "E": {
        "nom_mm": 7.938,
        "range_mm": [
          7.62,
          8.255
        ]
      },
      "e": {
        "nom_mm": 2.54,
        "range_mm": [
          null,
          null
        ]
      },
      "A": {
        "nom_mm": 5.334,
        "range_mm": [
          null,
          5.334
        ]
      },
      "source": "datasheet package drawing, every number found on its page (extract_pins --task dims)",
      "model_check": {
        "file": "sp721app.step",
        "verdict": "PASS",
        "reasons": [
          "height and body within the datasheet's package drawing"
        ],
        "by": "factory/package_fit.py"
      }
    }
  }
}