LM397

{
  "schema_version": 1,
  "type": "component",
  "slug": "lm397",
  "title": "LM397",
  "brief": "TI single general-purpose comparator, SOT-23-5. Open-collector output, 5-30 V wide supply. Datasheet-verified.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "comparator",
    "open-collector",
    "single",
    "sot-23-5",
    "texas-instruments"
  ],
  "component": {
    "mpn": "LM397",
    "manufacturer": "Texas Instruments",
    "package": "SOT-23-5",
    "pin_count": 5,
    "category": "Comparator",
    "subcategory": "Single comparator",
    "datasheet": "https://www.ti.com/lit/ds/symlink/lm397.pdf",
    "parts": {
      "symbol": "lm397.kicad_sym",
      "footprint": "lm397.kicad_mod",
      "model_3d": "lm397-etched.glb",
      "model_3d_plain": "lm397.glb",
      "model_3d_step": "lm397-etched.step",
      "model_3d_step_plain": "lm397.step",
      "lbr": "lm397.lbr"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "VIN-",
        "type": "input",
        "description": "Inverting analog input of the comparator. Common-mode range 0 V to VS - 1.5 V; must not go more than 0.3 V below the negative rail. Input bias current typ 10 nA, offset current typ 1.6 nA."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "Ground / negative supply return. In single-supply operation tied to 0 V; in split-supply operation tied to the negative rail."
      },
      {
        "number": "3",
        "name": "VIN+",
        "type": "input",
        "description": "Noninverting analog input of the comparator. Common-mode range 0 V to VS - 1.5 V; must not go more than 0.3 V below the negative rail."
      },
      {
        "number": "4",
        "name": "OUTPUT",
        "type": "output",
        "description": "Open-collector comparator output. Requires an external pull-up resistor to the desired logic rail (e.g., 5.1 kΩ to 5 V typical). Output sink current typ 13 mA (min 6 mA); leakage typ 0.1 nA at VO = 5 V, 1 µA max at VO = 30 V. VOL typ 180 mV at IO = -4 mA."
      },
      {
        "number": "5",
        "name": "VS",
        "type": "power_in",
        "description": "Positive supply pin. Single-supply range 5 V to 30 V (or ±15 V split). Supply current typ 250 µA at VS = 5 V, typ 300 µA at VS = 30 V."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://www.ti.com/lit/ds/symlink/lm397.pdf",
        "pages": 19,
        "sha256": "c7a1f660266357ba",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 5,
        "described": 5,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "lm397.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.8,
          2.9,
          1.55
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "720a6eab0024069bbee68e7cb4c3ff1149468a34611225cdc852662c5d0ec2b7",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "lm397-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.8,
          2.9,
          1.55
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "fa8cb40deb86f1486c07491e9e7703bd848ace2c75e5f164e8e0c3ba6f1c7601",
        "checked": "2026-10-23",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Type": "Single comparator (open-collector output)",
      "Supply": "5-30 V (single) or +/-15 V",
      "Output": "Open collector (needs pull-up)",
      "Input offset": "5 mV (typ)",
      "Response time": "~1.3 us",
      "Package": "SOT-23-5"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "lm397",
    "single comparator",
    "open collector comparator",
    "wide supply comparator"
  ],
  "discovery_pitch": "TI LM397 single general-purpose comparator (SOT-23-5) with datasheet-verified pinout, KiCad symbol/footprint/3D, and full provenance.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "lm397.kicad_sym",
    "lm397.kicad_mod",
    "lm397.glb",
    "lm397.step",
    "lm397.lbr",
    "docs/hero.png",
    "docs/lm397-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "lm397-etched.step"
  ],
  "variants": [
    {
      "mpn": "LM397MFX (SOT-23-5)",
      "kind": "packaging"
    },
    {
      "mpn": "LM397MF (SOT-23-5, tube)",
      "kind": "packaging"
    }
  ]
}