LM2674N-3.3

{
  "schema_version": 1,
  "type": "component",
  "slug": "lm2674n-3-3",
  "title": "LM2674N-3.3",
  "brief": "Texas Instruments DC-DC Converters, 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",
    "power management (pmic)",
    "lm2674n-3.3",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "LM2674N-3.3",
    "manufacturer": "Texas Instruments",
    "package": "PDIP-8",
    "pin_count": 8,
    "category": "Power Management (PMIC)",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://www.ti.com/cn/lit/gpn/lm2674",
    "parts": {
      "symbol": "lm2674n-3-3.kicad_sym",
      "footprint": "lm2674n-3-3.kicad_mod",
      "model_3d": "lm2674n-3-3-hero.glb",
      "model_3d_plain": "lm2674n-3-3.glb",
      "model_3d_step": "lm2674n-3-3-etched.step",
      "model_3d_step_plain": "lm2674n-3-3.step",
      "lbr": "lm2674n-3-3.lbr"
    },
    "distributor_links": {
      "lcsc": "C1355482",
      "digikey": "LM2674N-3.3-ND",
      "mouser": "926-LM2674N-33"
    },
    "distributor_check": {
      "checked_at": "2026-10-11T03:38:05Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "LM2674N-3.3-ND",
        "status": "found",
        "lifecycle": "Obsolete"
      },
      "mouser": {
        "pn": "926-LM2674N-33",
        "status": "found",
        "lifecycle": "Obsolete"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "CB",
        "type": "input",
        "description": "Bootstrap capacitor connection for the high-side driver; a 10nF quality capacitor is to be connected between the CB pin and the VSW pin."
      },
      {
        "number": "2",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection; leave this pin unconnected."
      },
      {
        "number": "3",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection; leave this pin unconnected."
      },
      {
        "number": "4",
        "name": "FB",
        "type": "input",
        "description": "Feedback sense input; for the fixed 3.3V output it connects directly to the output capacitor, and it must never be shorted to ground while the regulator is enabled (feedback pin voltage absolute maximum -0.3V to 14V)."
      },
      {
        "number": "5",
        "name": "ON/OFF",
        "type": "input",
        "description": "Enable input where high enables the regulator and low disables it; the pin must be pulled high or left floating to run, the off-mode threshold is below 1.4V, and it is internally pulled up to 7V (absolute maximum -0.1V to 6V)."
      },
      {
        "number": "6",
        "name": "GND",
        "type": "power_in",
        "description": "Power ground pin connected to system ground and to the CIN and COUT ground returns, with the CIN ground connection kept as short as possible."
      },
      {
        "number": "7",
        "name": "VIN",
        "type": "power_in",
        "description": "Power input to the high-side FET, connected to the supply and the input bypass capacitor CIN, with the VIN-to-CIN-to-GND path kept as short as possible; recommended supply range is 6.5V to 40V."
      },
      {
        "number": "8",
        "name": "VSW",
        "type": "output",
        "description": "Source of the internal high-side FET forming the switch node, connected to the inductor and the external diode cathode; switch voltage to ground is limited to -1V minimum."
      }
    ],
    "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: Pinout for the PDIP-8 package was taken from Figure 4-1 and Table 4-1 (page 3); the source document ; Pin types follow the datasheet's Table 4-1 (I = input, O = output) mapped to KiCad classes; the CB p; Pin descriptions are summarised one sentence each and include only limits the datasheet states; the "
        ],
        "pages_sent": 29,
        "cost_usd": 0.118,
        "at": "2026-10-11T03:37:51"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/lm2674",
        "pages": 41,
        "sha256": "a9cee9aefd8786a1",
        "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": [
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        "file": "lm2674n-3-3.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": "2026-10-11",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "lm2674n-3-3-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,
        "footprint_binding": "identity",
        "sha256": "094868b9cbb5552e4d941d4d53fb059af1a0808a3b1c3ccfaee3084a3e8022bb",
        "checked": "2026-10-11",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "PDIP-8",
      "Category": "Power Management (PMIC)",
      "Pins": "8"
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "lm2674n-3.3"
  ],
  "discovery_pitch": "LM2674N-3.3 (Texas Instruments) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
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    "README.md",
    "lm2674n-3-3.kicad_sym",
    "lm2674n-3-3.kicad_mod",
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    "lm2674n-3-3.step",
    "lm2674n-3-3.lbr",
    "docs/hero.png",
    "docs/lm2674n-3-3-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "lm2674n-3-3-hero.glb",
    "lm2674n-3-3-hero.overlay.json"
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  "visibility": {
    "public": true
  }
}