LM311DR-CN

{
  "schema_version": 1,
  "type": "component",
  "slug": "lm311dr-cn",
  "title": "LM311DR-CN",
  "brief": "ChipNobo Comparators, SOP-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",
    "amplifiers-comparators",
    "lm311dr-cn",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "LM311DR-CN",
    "manufacturer": "ChipNobo",
    "package": "SOP-8",
    "pin_count": 8,
    "category": "Amplifiers/Comparators",
    "subcategory": "Comparators",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/6705402938fd7859dbba8ce1387810e5.pdf",
    "parts": {
      "symbol": "lm311dr-cn.kicad_sym",
      "footprint": "lm311dr-cn.kicad_mod",
      "model_3d": "lm311dr-cn-hero.glb",
      "model_3d_plain": "lm311dr-cn.glb",
      "model_3d_step": "lm311dr-cn-etched.step",
      "model_3d_step_plain": "lm311dr-cn.step",
      "lbr": "lm311dr-cn.lbr"
    },
    "distributor_links": {
      "lcsc": "C42436869"
    },
    "distributor_check": {
      "checked_at": "2026-10-09T16:42:13Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "EMIT OUT",
        "type": "output",
        "description": "Emitter output of the open-emitter output transistor; voltage from emitter output to VCC- is limited to 30 V maximum."
      },
      {
        "number": "2",
        "name": "IN+",
        "type": "input",
        "description": "Non-inverting comparator input; input voltage is limited to ±15 V and differential input voltage to ±30 V."
      },
      {
        "number": "3",
        "name": "IN-",
        "type": "input",
        "description": "Inverting comparator input; input voltage is limited to ±15 V and differential input voltage to ±30 V."
      },
      {
        "number": "4",
        "name": "VCC-",
        "type": "power_in",
        "description": "Negative supply (ground in single-supply operation); dual supply is ±1.75 V to ±15 V recommended, ±18 V absolute maximum."
      },
      {
        "number": "5",
        "name": "BALANCE",
        "type": "input",
        "description": "Offset balance input used for input offset adjustment."
      },
      {
        "number": "6",
        "name": "BAL/STRB",
        "type": "input",
        "description": "Balance/strobe input; if the strobe is low the output is off regardless of differential input, and it must be current driven at -3 mA to -5 mA, never shorted to ground."
      },
      {
        "number": "7",
        "name": "COL OUT",
        "type": "output",
        "description": "Open-collector output that can switch up to 40 V at 50 mA and can be wire-OR connected; voltage from collector output to VCC- is 40 V maximum."
      },
      {
        "number": "8",
        "name": "VCC+",
        "type": "power_in",
        "description": "Positive supply; single supply is 3.5 V to 30 V recommended, 36 V absolute maximum."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-sonnet-5-5",
        "primary_mode": "text+vision",
        "consensus_model": "claude-opus-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: Pin types for BALANCE and BAL/STRB are inferred from the schematic, which shows them as inputs. The ; The datasheet says only that the offset balance pin is available. It gives no further detail on how ",
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 6,
        "cost_usd": 0.2144,
        "at": "2026-10-09T16:40:54"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/6705402938fd7859dbba8ce1387810e5.pdf",
        "pages": 6,
        "sha256": "19797b9635eb3523",
        "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": "lm311dr-cn.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          4.9,
          1.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "07f46cff378d30e6c27dfd5a03092c795323f86d91c71fc7e743f4f418dc553a",
        "checked": "2026-10-09",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "lm311dr-cn-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          4.9,
          1.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "5380e8fd0bc3c1ea252025d15970498f53c6bfb70e547b7647b3c6ca26ae7d18",
        "checked": "2026-10-09",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "ChipNobo",
      "Package": "SOP-8",
      "Category": "Amplifiers/Comparators",
      "Pins": "8"
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "lm311dr-cn"
  ],
  "discovery_pitch": "LM311DR-CN (ChipNobo) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "lm311dr-cn.kicad_sym",
    "lm311dr-cn.kicad_mod",
    "lm311dr-cn.glb",
    "lm311dr-cn.step",
    "lm311dr-cn.lbr",
    "docs/hero.png",
    "docs/lm311dr-cn-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "lm311dr-cn-hero.glb",
    "lm311dr-cn-hero.overlay.json"
  ],
  "visibility": {
    "public": true
  }
}