main
Ray Set visibility: public d1d299a 10d ago
{
  "schema_version": 1,
  "type": "component",
  "slug": "bl321",
  "title": "BL321",
  "brief": "BL Shanghai Belling Operational Amplifier, SOT-23-5. 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",
    "bl321",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "BL321",
    "manufacturer": "BL Shanghai Belling",
    "package": "SOT-23-5",
    "pin_count": 5,
    "category": "Amplifiers/Comparators",
    "subcategory": "Operational Amplifier",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588954906720423936",
    "parts": {
      "symbol": "bl321.kicad_sym",
      "footprint": "bl321.kicad_mod",
      "model_3d": "bl321-hero.glb",
      "model_3d_plain": "bl321-etched.glb",
      "model_3d_step": "bl321-etched.step",
      "model_3d_step_plain": "bl321.step",
      "lbr": "bl321.lbr"
    },
    "distributor_links": {
      "lcsc": "C2924841"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T04:11:38Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "+IN",
        "type": "input",
        "description": "Non-inverting input; common-mode range is 0 V to V+ - 1.5 V and the input may go to +25 V without damage but not below -0.3 V."
      },
      {
        "number": "2",
        "name": "V-",
        "type": "power_in",
        "description": "Negative supply, or ground in single-supply operation; the total supply (V+ - V-) is limited to 25 V absolute maximum."
      },
      {
        "number": "3",
        "name": "-IN",
        "type": "input",
        "description": "Inverting input; common-mode range is 0 V to V+ - 1.5 V and the input may go to +25 V without damage but not below -0.3 V."
      },
      {
        "number": "4",
        "name": "OUTPUT",
        "type": "output",
        "description": "Op amp output that can both source and sink current; short circuits to ground are continuous only for V+ of 15 V or less at 25 °C."
      },
      {
        "number": "5",
        "name": "V+",
        "type": "power_in",
        "description": "Positive supply, operating range +3 V to +25 V (25 V absolute maximum for V+ - V-)."
      }
    ],
    "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: The pin assignment comes from the block diagram on page 1, which is labeled SOT-23-5L. The package d; The datasheet gives no pin-by-pin descriptions. The descriptions are built from the Absolute Maximum",
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 7,
        "cost_usd": 0.2265,
        "at": "2026-10-18T04:09:45"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588954906720423936",
        "pages": 7,
        "sha256": "0e77d7bc522b00de",
        "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": "bl321.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,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "720a6eab0024069bbee68e7cb4c3ff1149468a34611225cdc852662c5d0ec2b7",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "bl321-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "780d4a258af0fe5913537fb0eb99f7b136e028f40c9d6d218ab2f15f2104803e",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "BL Shanghai Belling",
      "Package": "SOT-23-5",
      "Category": "Amplifiers/Comparators",
      "Pins": "5"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "0e77d7bc522b00de1ad2bcdac53dcd90991aa62702d873e7c5d47e3e713fd6ed",
      "rows": [
        {
          "name": "Supply Voltage (V+ - V-)",
          "symbol": "(V+ - V-)",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 25,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Input Voltage",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 25,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Junction Temperature",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": null,
          "typ": null,
          "max": 150,
          "conditions": "Note 3",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Operating Temperature Range",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "℃",
          "min": -40,
          "typ": null,
          "max": 85,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Storage Temperature Range",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Supply Voltage (wide supply range)",
          "symbol": "V+",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 3,
          "typ": null,
          "max": 25,
          "conditions": "Per Features: +3V to +25V; Application Summary: minimum 3V at 25°C",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Input Offset Voltage",
          "symbol": "",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 2,
          "max": 5,
          "conditions": "Ta=25℃ (Note 4)",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Input Bias Current",
          "symbol": "IIN(+), IIN(-)",
          "kind": "electrical",
          "unit": "nA",
          "min": null,
          "typ": 45,
          "max": 150,
          "conditions": "Ta=25℃, IIN(+) or IIN(-), VCM=0V (Note 5)",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Input Offset Current",
          "symbol": "IIN(+) - IIN(-)",
          "kind": "electrical",
          "unit": "nA",
          "min": null,
          "typ": 3,
          "max": 30,
          "conditions": "Ta=25℃, IIN(+) - IIN(-), VCM=0V",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Input Common-Mode Voltage Range",
          "symbol": "VCM",
          "kind": "electrical",
          "unit": "V",
          "min": 0,
          "typ": null,
          "max": null,
          "conditions": "Ta=25℃, V+=25V (Note 6)",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Supply Current (V+=25V)",
          "symbol": "",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 0.4,
          "max": 2,
          "conditions": "Full temperature range, RL=∞ on all Op Amps, V+=25V",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Supply Current (V+=5V)",
          "symbol": "",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 0.33,
          "max": 1.2,
          "conditions": "Full temperature range, RL=∞ on all Op Amps, V+=5V",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Large Signal Voltage Gain",
          "symbol": "",
          "kind": "electrical",
          "unit": "V/mV",
          "min": 80,
          "typ": 100,
          "max": null,
          "conditions": "V+=15V, Ta=25℃, RL≥2kΩ (For Vo=1~11V)",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Common-Mode Rejection Ratio",
          "symbol": "CMRR",
          "kind": "electrical",
          "unit": "dB",
          "min": 70,
          "typ": 90,
          "max": null,
          "conditions": "DC, Ta=25℃, VCM=0~V+-1.5V",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Power Supply Rejection Ratio",
          "symbol": "PSRR",
          "kind": "electrical",
          "unit": "dB",
          "min": 70,
          "typ": 85,
          "max": null,
          "conditions": "DC, Ta=25℃, V+=5~25V",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Output Current Source",
          "symbol": "IO",
          "kind": "electrical",
          "unit": "mA",
          "min": 20,
          "typ": 50,
          "max": null,
          "conditions": "VIN(+)=1V, VIN(-)=0V, V+=15V, Vo=2V, Ta=25℃",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Output Current Sink",
          "symbol": "IO",
          "kind": "electrical",
          "unit": "mA",
          "min": 4,
          "typ": 6,
          "max": null,
          "conditions": "VIN(-)=1V, VIN(+)=0V, V+=15V, Vo=2V, Ta=25℃",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Output Current Sink (Vo=200mV)",
          "symbol": "IO",
          "kind": "electrical",
          "unit": "µA",
          "min": 8,
          "typ": 45,
          "max": null,
          "conditions": "VIN(-)=1V, VIN(+)=0V, V+=15V, Vo=200mV, Ta=25℃",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Short Circuit to Ground",
          "symbol": "ISC",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 40,
          "max": 85,
          "conditions": "V+=15V, Ta=25℃ (Note 2)",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Output Voltage Swing High (RL=2kΩ)",
          "symbol": "VOH",
          "kind": "electrical",
          "unit": "V",
          "min": 22,
          "typ": 23,
          "max": null,
          "conditions": "V+=25V, RL=2kΩ",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Output Voltage Swing High (RL=10kΩ)",
          "symbol": "VOH",
          "kind": "electrical",
          "unit": "V",
          "min": 22,
          "typ": 23.5,
          "max": null,
          "conditions": "V+=25V, RL=10kΩ",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Output Voltage Swing Low",
          "symbol": "VOL",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": null,
          "max": 20,
          "conditions": "V+=5V, RL=10kΩ",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Amplifier-to-Amplifier Coupling",
          "symbol": "",
          "kind": "electrical",
          "unit": "dB",
          "min": null,
          "typ": -120,
          "max": null,
          "conditions": "Ta=25℃, f=1~20kHz (Input Referred) (Note 7)",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Thermal Resistance to Ambient",
          "symbol": "θJA",
          "kind": "thermal",
          "unit": "℃",
          "min": null,
          "typ": 265,
          "max": null,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
        }
      ]
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "bl321"
  ],
  "discovery_pitch": "BL321 (BL Shanghai Belling) 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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    "bl321.kicad_mod",
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    "bl321.step",
    "bl321.lbr",
    "docs/hero.png",
    "docs/bl321-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "bl321-hero.glb",
    "bl321-hero.overlay.json",
    "bl321-etched.glb"
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  "visibility": {
    "public": true
  }
}