SP721APP

{
  "schema_version": 1,
  "type": "component",
  "slug": "sp721app",
  "title": "SP721APP",
  "brief": "Littelfuse Electrostatic And Surge Protection (TVS/ESD), PDIP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "circuit protection",
    "sp721app",
    "factory-2.0.0",
    "extractor-text"
  ],
  "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": {
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      "footprint": "sp721app.kicad_mod",
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      "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,
        "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",
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        "extents_mm": [
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        "zmin_mm": -3.3,
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        "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"
      }
    }
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Littelfuse",
      "Package": "PDIP-8",
      "Category": "Circuit Protection",
      "Pins": "8"
    },
    "appearance": {
      "contacts": {
        "quote": "Lead Plating Matte Tin Lead Material Copper Alloy",
        "page": 6,
        "doc": "ds.pdf",
        "material": "Copper Alloy",
        "plating": "tin"
      },
      "version": 1,
      "datasheet_sha256": "eb5e983ff1c51866527ea4f083c02aec8e8878587e00104dac156fca6f2ffc28"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "eb5e983ff1c51866527ea4f083c02aec8e8878587e00104dac156fca6f2ffc28",
      "rows": [
        {
          "name": "Operating Voltage Range",
          "symbol": "VSUPPLY",
          "kind": "electrical",
          "unit": "V",
          "min": 2,
          "typ": null,
          "max": 30,
          "conditions": "VSUPPLY = [(V+) - (V-)]",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Input Leakage Current",
          "symbol": "IIN",
          "kind": "electrical",
          "unit": "nA",
          "min": -20,
          "typ": 5,
          "max": 20,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Quiescent Supply Current",
          "symbol": "IQUIESCENT",
          "kind": "electrical",
          "unit": "nA",
          "min": null,
          "typ": 50,
          "max": 200,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Continuous Supply Voltage, (V+) - (V-)",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 35,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Forward Peak Current, IIN to VCC, IIN to GND",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "A",
          "min": -2,
          "typ": null,
          "max": 2,
          "conditions": "100µs; IIN to VCC, IIN to GND (Refer to Figure 5)",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Maximum Storage Temperature Range",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Maximum Junction Temperature (Plastic Package)",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Operating Temperature Range",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 105,
          "conditions": "Temp. Range column, ordering table for SP721APP",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Thermal Resistance, junction to ambient (PDIP package)",
          "symbol": "θJA",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 160,
          "max": null,
          "conditions": "PDIP package; typical, Note 1 (measured on evaluation PC board in free air)",
          "source_page": 2,
          "source": "datasheet"
        }
      ]
    }
  },
  "variants": [],
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  "discovery_triggers": [
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  ],
  "discovery_pitch": "SP721APP (Littelfuse) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
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    "public": true
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}