main
Ray Set visibility: public 4103312 6d ago
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{
  "schema_version": 1,
  "type": "component",
  "slug": "fst3125dr2g",
  "title": "FST3125DR2G",
  "brief": "onsemi Signal Switches, Multiplexers, Decoders, SOIC-14. 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",
    "logic",
    "fst3125dr2g",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "FST3125DR2G",
    "manufacturer": "onsemi",
    "package": "SOIC-14",
    "pin_count": 14,
    "category": "Logic",
    "subcategory": "Signal Switches, Multiplexers, Decoders",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588929542169219072",
    "parts": {
      "symbol": "fst3125dr2g.kicad_sym",
      "footprint": "fst3125dr2g.kicad_mod",
      "model_3d": "fst3125dr2g-hero.glb",
      "model_3d_plain": "fst3125dr2g-etched.glb",
      "model_3d_step": "fst3125dr2g-etched.step",
      "model_3d_step_plain": "fst3125dr2g.step",
      "lbr": "fst3125dr2g.lbr"
    },
    "distributor_links": {
      "lcsc": "C903749",
      "digikey": "488-FST3125DR2GTR-ND",
      "mouser": "863-FST3125DR2G"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T01:45:39Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "488-FST3125DR2GTR-ND",
        "status": "found",
        "lifecycle": "Obsolete"
      },
      "mouser": {
        "pn": "863-FST3125DR2G",
        "status": "found",
        "lifecycle": "Obsolete"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "OE1",
        "type": "input",
        "description": "Active-low bus switch enable for switch 1; A1 connects to B1 when low and the switch is high-Z when high, TTL/CMOS compatible and must not be left open."
      },
      {
        "number": "2",
        "name": "1A",
        "type": "bidirectional",
        "description": "Bus A port of switch 1, connected to 1B when OE1 is low."
      },
      {
        "number": "3",
        "name": "1B",
        "type": "bidirectional",
        "description": "Bus B port of switch 1, connected to 1A when OE1 is low."
      },
      {
        "number": "4",
        "name": "OE2",
        "type": "input",
        "description": "Active-low bus switch enable for switch 2; A connects to B when low and the switch is high-Z when high, must not be left open."
      },
      {
        "number": "5",
        "name": "2A",
        "type": "bidirectional",
        "description": "Bus A port of switch 2, connected to 2B when OE2 is low."
      },
      {
        "number": "6",
        "name": "2B",
        "type": "bidirectional",
        "description": "Bus B port of switch 2, connected to 2A when OE2 is low."
      },
      {
        "number": "7",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin."
      },
      {
        "number": "8",
        "name": "3B",
        "type": "bidirectional",
        "description": "Bus B port of switch 3, connected to 3A when OE3 is low."
      },
      {
        "number": "9",
        "name": "3A",
        "type": "bidirectional",
        "description": "Bus A port of switch 3, connected to 3B when OE3 is low."
      },
      {
        "number": "10",
        "name": "OE3",
        "type": "input",
        "description": "Active-low bus switch enable for switch 3; A connects to B when low and the switch is high-Z when high, must not be left open."
      },
      {
        "number": "11",
        "name": "4B",
        "type": "bidirectional",
        "description": "Bus B port of switch 4, connected to 4A when OE4 is low."
      },
      {
        "number": "12",
        "name": "4A",
        "type": "bidirectional",
        "description": "Bus A port of switch 4, connected to 4B when OE4 is low."
      },
      {
        "number": "13",
        "name": "OE4",
        "type": "input",
        "description": "Active-low bus switch enable for switch 4; A connects to B when low and the switch is high-Z when high, must not be left open."
      },
      {
        "number": "14",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply voltage, 4.0 V to 5.5 V recommended operating range (absolute maximum 7.0 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 Figure 1 pin assignment was read from flattened text, where the pin names and numbers come out a; The page 2 logic diagram numbering conflicts with the Figure 1 mapping (for example it places OE1 at; The datasheet does not give an electrical type for the OE pins. I classed them as input because they"
        ],
        "pages_sent": 9,
        "cost_usd": 0.1312,
        "at": "2026-10-18T01:43:50"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588929542169219072",
        "pages": 9,
        "sha256": "dd073cc476dbf01e",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 14,
        "described": 14,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "fst3125dr2g.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          8.7,
          1.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "3b9a775da256c8afcc28dcddfbc2eb3f266107fe61ce8446d96f2c52b6f44a70",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "fst3125dr2g-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "bd13637db9c55291c630d46718cbbf3aafd20af16d2af6a7c5190a0a70e9b892",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "onsemi",
      "Package": "SOIC-14",
      "Category": "Logic",
      "Pins": "14"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "dd073cc476dbf01e945de8ad7bd8c0a6c80c2b033dcc47073a21c2731521831f",
      "rows": [
        {
          "name": "Supply Voltage Operating, Data Retention Only",
          "symbol": "VCC",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 4,
          "typ": null,
          "max": 5.5,
          "conditions": "Operating, Data Retention Only",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Input Voltage",
          "symbol": "VI",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 0,
          "typ": null,
          "max": 5.5,
          "conditions": "Note 5",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Output Voltage (HIGH or LOW State)",
          "symbol": "VO",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 0,
          "typ": null,
          "max": 5.5,
          "conditions": "HIGH or LOW state",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Operating Free-Air Temperature",
          "symbol": "TA",
          "kind": "recommended_operating",
          "unit": "C",
          "min": -55,
          "typ": null,
          "max": 125,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Input Transition Rise or Fall Rate",
          "symbol": "t/V",
          "kind": "recommended_operating",
          "unit": "ns/V",
          "min": 0,
          "typ": null,
          "max": 5,
          "conditions": "Switch Control Input",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Input Transition Rise or Fall Rate",
          "symbol": "t/V",
          "kind": "recommended_operating",
          "unit": "ns/V",
          "min": 0,
          "typ": null,
          "max": null,
          "conditions": "Switch I/O; max printed as DC",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "DC Supply Voltage",
          "symbol": "VCC",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.5,
          "typ": null,
          "max": 7,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "DC Input Voltage",
          "symbol": "VI",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.5,
          "typ": null,
          "max": 7,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "DC Output Voltage",
          "symbol": "VO",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.5,
          "typ": null,
          "max": 7,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "DC Input Diode Current",
          "symbol": "IIK",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 50,
          "conditions": "VI < GND",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "DC Output Diode Current",
          "symbol": "IOK",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 50,
          "conditions": "VO < GND",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "DC Output Sink Current",
          "symbol": "IO",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 128,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "DC Supply Current per Supply Pin",
          "symbol": "ICC",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 100,
          "conditions": "per supply pin",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "DC Ground Current per Ground Pin",
          "symbol": "IGND",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 100,
          "conditions": "per ground pin",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Storage Temperature Range",
          "symbol": "TSTG",
          "kind": "absolute_maximum",
          "unit": "C",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Lead Temperature",
          "symbol": "TL",
          "kind": "absolute_maximum",
          "unit": "C",
          "min": null,
          "typ": null,
          "max": 260,
          "conditions": "1 mm from case for 10 seconds",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Junction Temperature Under Bias",
          "symbol": "TJ",
          "kind": "absolute_maximum",
          "unit": "C",
          "min": null,
          "typ": null,
          "max": 150,
          "conditions": "Under bias",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Thermal Resistance, junction to ambient",
          "symbol": "JA",
          "kind": "thermal",
          "unit": "C/W",
          "min": null,
          "typ": null,
          "max": 125,
          "conditions": "SOIC; Note 1 (minimum pad spacing, FR4 board)",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "ESD Withstand Voltage Human Body Model",
          "symbol": "VESD",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 4000,
          "conditions": "Human Body Model (Note 2)",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "ESD Withstand Voltage Machine Model",
          "symbol": "VESD",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 400,
          "conditions": "Machine Model (Note 3)",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "ESD Withstand Voltage Charged Device Model",
          "symbol": "VESD",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 2000,
          "conditions": "Charged Device Model",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Latchup Performance",
          "symbol": "ILatchup",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 100,
          "conditions": "Above VCC and below GND at 85C (Note 4)",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "High-Level Input Voltage",
          "symbol": "VIH",
          "kind": "electrical",
          "unit": "V",
          "min": 2,
          "typ": null,
          "max": null,
          "conditions": "VCC 4.0 to 5.5 V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Low-Level Input Voltage",
          "symbol": "VIL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.8,
          "conditions": "VCC 4.0 to 5.5 V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Switch On Resistance",
          "symbol": "RON",
          "kind": "electrical",
          "unit": "ohm",
          "min": null,
          "typ": 4,
          "max": 7,
          "conditions": "VIN = 0 V, IIN = 64 mA, VCC 4.5 V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Switch On Resistance",
          "symbol": "RON",
          "kind": "electrical",
          "unit": "ohm",
          "min": null,
          "typ": 8,
          "max": 15,
          "conditions": "VIN = 2.4 V, IIN = 15 mA, VCC 4.5 V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Switch On Resistance",
          "symbol": "RON",
          "kind": "electrical",
          "unit": "ohm",
          "min": null,
          "typ": 11,
          "max": 20,
          "conditions": "VIN = 2.4 V, IIN = 15 mA, VCC 4.0 V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Prop Delay Bus to Bus",
          "symbol": "tPHL, tPLH",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": null,
          "max": 0.25,
          "conditions": "VI = OPEN; Figures 3 and 4; VCC 4.5 to 5.5 V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Output Enable Time",
          "symbol": "tPZH, tPZL",
          "kind": "timing",
          "unit": "ns",
          "min": 1,
          "typ": null,
          "max": 5,
          "conditions": "VI = 7 V for tPZL, VI = OPEN for tPZH; Figures 3 and 5; VCC 4.5 to 5.5 V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Output Enable Time",
          "symbol": "tPZH, tPZL",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": null,
          "max": 5.5,
          "conditions": "VI = 7 V for tPZL, VI = OPEN for tPZH; Figures 3 and 5; VCC 4.0 V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Output Disable Time",
          "symbol": "tPHZ, tPLZ",
          "kind": "timing",
          "unit": "ns",
          "min": 1.5,
          "typ": null,
          "max": 5.3,
          "conditions": "VI = 7 V for tPLZ, VI = OPEN for tPHZ; Figures 3 and 5; VCC 4.5 to 5.5 V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Output Disable Time",
          "symbol": "tPHZ, tPLZ",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": null,
          "max": 5.6,
          "conditions": "VI = 7 V for tPLZ, VI = OPEN for tPHZ; Figures 3 and 5; VCC 4.0 V",
          "source_page": 4,
          "source": "datasheet"
        }
      ]
    }
  },
  "variants": [],
  "sections": [
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    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "fst3125dr2g"
  ],
  "discovery_pitch": "FST3125DR2G (onsemi) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
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  "visibility": {
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}