main
Ray Set visibility: public 3edb910 11d ago
{
  "schema_version": 1,
  "type": "component",
  "slug": "lm4861mm",
  "title": "LM4861MM",
  "brief": "HGSEMI Audio Amplifiers, MSOP-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": [
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  "component": {
    "mpn": "LM4861MM",
    "manufacturer": "HGSEMI",
    "package": "MSOP-8",
    "pin_count": 8,
    "category": "Amplifiers/Comparators",
    "subcategory": "Audio Amplifiers",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8615629887185174528",
    "parts": {
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      "footprint": "lm4861mm.kicad_mod",
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      "model_3d_plain": "lm4861mm-etched.glb",
      "model_3d_step": "lm4861mm-etched.step",
      "model_3d_step_plain": "lm4861mm.step",
      "lbr": "lm4861mm.lbr"
    },
    "distributor_links": {
      "lcsc": "C47411555"
    },
    "distributor_check": {
      "checked_at": "2026-10-17T19:14:41Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "SHUTDOWN",
        "type": "input",
        "description": "Shutdown control: logic high (VDD) turns the amplifier bias off (0.6µA typ), connect to GND to enable, and do not leave floating."
      },
      {
        "number": "2",
        "name": "BYPASS",
        "type": "passive",
        "description": "Half-supply (VDD/2) bypass pin, decoupled with capacitor CB (1.0µF in the typical application) for half-supply filtering."
      },
      {
        "number": "3",
        "name": "+IN",
        "type": "input",
        "description": "Non-inverting input of the first amplifier."
      },
      {
        "number": "4",
        "name": "-IN",
        "type": "input",
        "description": "Inverting input of the first amplifier, with gain set by Rf/Ri and an input coupling capacitor Ci."
      },
      {
        "number": "5",
        "name": "Vo1",
        "type": "output",
        "description": "Output of the first amplifier, one side of the bridged load."
      },
      {
        "number": "6",
        "name": "VDD",
        "type": "power_in",
        "description": "Positive supply, 2.5V to 5.5V operating range (6.0V absolute maximum), bypassed with CS."
      },
      {
        "number": "7",
        "name": "GND",
        "type": "power_in",
        "description": "Ground."
      },
      {
        "number": "8",
        "name": "Vo2",
        "type": "output",
        "description": "Output of the second amplifier (fixed unity-gain inverting), other side of the bridged load."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
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        "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-to-function assignment comes from the connection diagram image (page 3), which is shared by the ",
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 17,
        "cost_usd": 0.3644,
        "at": "2026-10-17T19:12:11"
      },
      "datasheet": {
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        "pages": 17,
        "sha256": "dc0b74bb23017914",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 8,
        "described": 8,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
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      "footprint": "viewers/footprint.html"
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        "role": "plain",
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        "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": "847c4c5023fe1603fbd36900a5dcc4bd3901ba473f71d42c9a469f0236eaadf3",
        "checked": "2026-10-17",
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        "checked": "2026-10-17",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "HGSEMI",
      "Package": "MSOP-8",
      "Category": "Amplifiers/Comparators",
      "Pins": "8"
    },
    "characteristics": {
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      "datasheet_sha256": "dc0b74bb23017914bd9cea9db9bea076df1107e8fea0c27c11a102465c4a0c79",
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          "typ": null,
          "max": 5.5,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
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          "symbol": "VDD",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 2.5,
          "typ": null,
          "max": 5.5,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Quiescent Power Supply Current",
          "symbol": "IDD",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 6.5,
          "max": 10,
          "conditions": "VIN = 0V, IO = 0A",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Shutdown Current",
          "symbol": "ISD",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 0.6,
          "max": 10,
          "conditions": "VSHUTDOWN = VDD",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Output Offset Voltage",
          "symbol": "VOS",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 5,
          "max": 50,
          "conditions": "VIN = 0V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Output Power",
          "symbol": "PO",
          "kind": "electrical",
          "unit": "W",
          "min": 1,
          "typ": 1.1,
          "max": null,
          "conditions": "THD = 1% (max); f = 1 kHz",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Total Harmonic Distortion + Noise (key specification)",
          "symbol": "THD+N",
          "kind": "electrical",
          "unit": "%",
          "min": null,
          "typ": null,
          "max": 1,
          "conditions": "1kHz at 1W continuous average output power into 8Ω",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Temperature Range",
          "symbol": "TA",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 85,
          "conditions": "TMIN ≤ TA ≤ TMAX",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Supply Voltage (absolute maximum)",
          "symbol": "VDD",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 6,
          "conditions": "",
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        },
        {
          "name": "Storage Temperature",
          "symbol": "TSTG",
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          "unit": "°C",
          "min": -65,
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          "max": 150,
          "conditions": "",
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        },
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          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": null,
          "conditions": "Upper limit printed as VDD + 0.3V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Junction Temperature",
          "symbol": "TJ",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Lead Temperature",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 260,
          "conditions": "Soldering, 10 seconds",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "ESD Susceptibility (Human Body Model)",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 3000,
          "conditions": "Human body model, 100pF discharged through a 1.5kΩ resistor",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "ESD Susceptibility (Machine Model)",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 250,
          "conditions": "Machine model, 220pF–240pF discharged through all pins",
          "source_page": 4,
          "source": "datasheet"
        }
      ]
    }
  },
  "variants": [],
  "sections": [
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    "readme",
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  "discovery_triggers": [
    "lm4861mm"
  ],
  "discovery_pitch": "LM4861MM (HGSEMI) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
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    "lm4861mm.lbr",
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    "viewers/symbol.html",
    "viewers/footprint.html",
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    "lm4861mm-hero.overlay.json",
    "lm4861mm-etched.glb"
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  "visibility": {
    "public": true
  }
}