LR321

{
  "schema_version": 1,
  "type": "component",
  "slug": "lr321",
  "title": "LR321",
  "brief": "LRC Operational Amplifier, SOT-23-5. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "op-amp-cmp",
    "lr321"
  ],
  "component": {
    "mpn": "LR321",
    "manufacturer": "LRC",
    "package": "SOT-23-5",
    "pin_count": 5,
    "category": "Op-amp/Cmp",
    "subcategory": "Operational Amplifier",
    "datasheet": "https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2201121800_LRC-LR321_C2936724.pdf",
    "parts": {
      "symbol": "lr321.kicad_sym",
      "footprint": "lr321.kicad_mod",
      "model_3d": "lr321-etched.glb",
      "model_3d_plain": "lr321.glb",
      "model_3d_step": "lr321-etched.step",
      "model_3d_step_plain": "lr321.step",
      "lbr": "lr321.lbr"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "+IN",
        "type": "input",
        "description": "Non-inverting input of the op-amp. Rail-to-rail input common-mode range from (-VS - 0.1V) to (+VS + 0.1V); absolute limit (-VS) - 0.5V to (+VS) + 0.5V. Input bias current ~10pA typical."
      },
      {
        "number": "2",
        "name": "-VS",
        "type": "power_in",
        "description": "Negative supply rail. Connect to GND for single-supply operation (2.5V-5.5V), or to a negative rail for dual-supply operation (±1.25V to ±2.75V). Absolute max V+ to V- = 7.5V."
      },
      {
        "number": "3",
        "name": "-IN",
        "type": "input",
        "description": "Inverting input of the op-amp. Rail-to-rail input common-mode range; input bias current ~10pA typical, input offset voltage ±0.8mV typical (±5mV max)."
      },
      {
        "number": "4",
        "name": "OUT",
        "type": "output",
        "description": "Rail-to-rail output. Output swing ~8mV from rails at RL=100kΩ, ~80mV at RL=10kΩ. Short-circuit / output current capability ~23mA typ (20mA min). Can directly drive up to 250pF capacitive load in unity gain."
      },
      {
        "number": "5",
        "name": "+VS",
        "type": "power_in",
        "description": "Positive supply rail. Operating range 2.1V to 5.5V (single-supply 2.5V-5.5V, dual-supply ±1.25V to ±2.75V). Quiescent current 60µA typical. Bypass with 0.1µF ceramic close to the pin."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2201121800_LRC-LR321_C2936724.pdf",
        "pages": 8,
        "sha256": "ffaa7779e8ef5c9e",
        "source_tier": "lcsc"
      },
      "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": "lr321.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": "lr321-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": "e40d08b7fc00cbc25412a96c6bc50d638a59770fe2adb00ca8926cb8dfab74be",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "LRC",
      "Package": "SOT-23-5",
      "Category": "Op-amp/Cmp",
      "Pins": "5"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "lr321"
  ],
  "discovery_pitch": "LR321 (LRC) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "lr321.kicad_sym",
    "lr321.kicad_mod",
    "lr321.glb",
    "lr321.step",
    "lr321.lbr",
    "docs/hero.png",
    "docs/lr321-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "lr321-etched.step"
  ],
  "visibility": {
    "public": true
  },
  "updated_at": "2026-09-28T18:04:05.302Z"
}