main
Ray Set visibility: public e9d764f 7d ago
{
  "schema_version": 1,
  "type": "component",
  "slug": "sp721abtg",
  "title": "SP721ABTG",
  "brief": "Littelfuse Surge Suppressors, SOIC-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": [
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    "sp721abtg",
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    "extractor-text"
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  "component": {
    "mpn": "SP721ABTG",
    "manufacturer": "Littelfuse",
    "package": "SOIC-8",
    "pin_count": 8,
    "category": "TVS/Fuse/Board Level Protection",
    "subcategory": "Surge Suppressors",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/9a218b5992648aff3cfb0432817142fd.pdf",
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      "lbr": "sp721abtg.lbr",
      "model_3d_plain": "sp721abtg.glb"
    },
    "distributor_links": {
      "lcsc": "C17272510",
      "digikey": "F3163TR-ND",
      "mouser": "576-SP721ABTG"
    },
    "distributor_check": {
      "checked_at": "2026-11-02T17:35:34Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "F3163TR-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "576-SP721ABTG",
        "status": "found"
      }
    },
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        "name": "IN",
        "type": "input",
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      },
      {
        "number": "2",
        "name": "IN",
        "type": "input",
        "description": "Protected input pin; overvoltage protection runs from IN to V+ or V-, with single-ended voltage range to +30V and differential voltage range to ±15V."
      },
      {
        "number": "3",
        "name": "IN",
        "type": "input",
        "description": "Protected input pin; overvoltage protection runs from IN to V+ or V-, with single-ended voltage range to +30V and differential voltage range to ±15V."
      },
      {
        "number": "4",
        "name": "V-",
        "type": "power_in",
        "description": "Negative supply pin; SCR structures trigger at a negative pulse of one VBE diode threshold below V-."
      },
      {
        "number": "5",
        "name": "IN",
        "type": "input",
        "description": "Protected input pin; overvoltage protection runs from IN to V+ or V-, with single-ended voltage range to +30V and differential voltage range to ±15V."
      },
      {
        "number": "6",
        "name": "IN",
        "type": "input",
        "description": "Protected input pin; overvoltage protection runs from IN to V+ or V-, with single-ended voltage range to +30V and differential voltage range to ±15V."
      },
      {
        "number": "7",
        "name": "IN",
        "type": "input",
        "description": "Protected input pin; overvoltage protection runs from IN to V+ or V-, with single-ended voltage range to +30V and differential voltage range to ±15V."
      },
      {
        "number": "8",
        "name": "V+",
        "type": "power_in",
        "description": "Positive supply pin; SCR structures trigger at one VBE diode threshold above V+."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
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        "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: Pin-to-function mapping for pins 1-8 is taken from the text-extracted SOIC/PDIP top-view diagram on "
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        "pages_sent": 6,
        "cost_usd": 0.0124,
        "at": "2026-11-02T17:35:26"
      },
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        "pages": 6,
        "sha256": "eb5e983ff1c51866",
        "source_tier": "lcsc"
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      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 8,
        "described": 8,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
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        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "07f46cff378d30e6c27dfd5a03092c795323f86d91c71fc7e743f4f418dc553a",
        "checked": "2026-11-02",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Littelfuse",
      "Package": "SOIC-8",
      "Category": "TVS/Fuse/Board Level 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"
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    "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": "",
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        },
        {
          "name": "Quiescent Supply Current",
          "symbol": "IQUIESCENT",
          "kind": "electrical",
          "unit": "nA",
          "min": null,
          "typ": 50,
          "max": 200,
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        {
          "name": "Continuous Supply Voltage",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 35,
          "conditions": "(V+) - (V-)",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Forward Peak Current",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "A",
          "min": null,
          "typ": null,
          "max": 2,
          "conditions": "IIN to VCC, IIN to GND; 100us",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Operating Temperature Range",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "C",
          "min": -40,
          "typ": null,
          "max": 105,
          "conditions": "",
          "source_page": 1,
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        },
        {
          "name": "Maximum Storage Temperature Range",
          "symbol": "",
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          "min": -65,
          "typ": null,
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          "conditions": "",
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        {
          "name": "Maximum Junction Temperature (Plastic Package)",
          "symbol": "",
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        },
        {
          "name": "Maximum Lead Temperature (Soldering)",
          "symbol": "",
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          "unit": "C",
          "min": null,
          "typ": null,
          "max": 260,
          "conditions": "Soldering 20-40s (SOIC Lead Tips Only)",
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          "source": "datasheet"
        },
        {
          "name": "Thermal Resistance Junction-to-Ambient (SOIC)",
          "symbol": "θJA",
          "kind": "thermal",
          "unit": "oC/W",
          "min": null,
          "typ": 170,
          "max": null,
          "conditions": "Typical, Note 1; SOIC Package",
          "source_page": 2,
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        },
        {
          "name": "Forward Voltage Drop IN to V-",
          "symbol": "VFWDL",
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          "min": null,
          "typ": 2,
          "max": null,
          "conditions": "IIN = 1A (Peak Pulse)",
          "source_page": 2,
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        {
          "name": "Forward Voltage Drop IN to V+",
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          "conditions": "",
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        {
          "name": "Equivalent SCR ON Threshold",
          "symbol": "",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 1.1,
          "max": null,
          "conditions": "Note 3",
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        {
          "name": "Equivalent SCR ON Resistance",
          "symbol": "",
          "kind": "electrical",
          "unit": "Ω",
          "min": null,
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          "max": null,
          "conditions": "VFWD/IFWD; Note 3",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Input Capacitance",
          "symbol": "CIN",
          "kind": "electrical",
          "unit": "pF",
          "min": null,
          "typ": 3,
          "max": null,
          "conditions": "",
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          "source": "datasheet"
        },
        {
          "name": "Input Switching Speed",
          "symbol": "tON",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 2,
          "max": null,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        }
      ]
    }
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  "discovery_triggers": [
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  "discovery_pitch": "SP721ABTG (Littelfuse) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
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}