LM4871M

{
  "slug": "lm4871m",
  "version": "0.1.0",
  "type": "component",
  "description": "HGSEMI Audio Amplifiers, SOP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "amplifiers-comparators",
    "lm4871m",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "lm4871m.kicad_sym",
    "lm4871m.kicad_mod",
    "lm4871m.glb",
    "lm4871m.step",
    "lm4871m.lbr",
    "docs/hero.png",
    "docs/lm4871m-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "lm4871m-hero.glb",
    "lm4871m-hero.overlay.json",
    "lm4871m-etched.glb"
  ],
  "component": {
    "mpn": "LM4871M",
    "manufacturer": "HGSEMI",
    "package": "SOP-8",
    "pin_count": 8,
    "category": "Amplifiers/Comparators",
    "subcategory": "Audio Amplifiers",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8758046069568102400",
    "parts": {
      "symbol": "lm4871m.kicad_sym",
      "footprint": "lm4871m.kicad_mod",
      "model_3d": "lm4871m-hero.glb",
      "model_3d_plain": "lm4871m-etched.glb",
      "model_3d_step": "lm4871m-etched.step",
      "model_3d_step_plain": "lm4871m.step",
      "lbr": "lm4871m.lbr"
    },
    "distributor_links": {
      "lcsc": "C234206"
    },
    "distributor_check": {
      "checked_at": "2026-10-17T16:43:14Z",
      "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: a high level shuts the amplifier down (no output), a low level is required for normal operation, and the pin must not be left floating because it then enters an undefined state; the datasheet gives VSD_H of 0.8 V and VSD_L of 0.5 V at VDD=5V."
      },
      {
        "number": "2",
        "name": "Bypass",
        "type": "passive",
        "description": "Internal common-mode voltage node that needs an external bypass capacitor; the datasheet specifies 1 µF in the example circuit and recommends 0.1 µF to 1 µF ceramic, which affects PSRR and switching noise."
      },
      {
        "number": "3",
        "name": "+IN",
        "type": "input",
        "description": "Non-inverting audio input."
      },
      {
        "number": "4",
        "name": "-IN",
        "type": "input",
        "description": "Inverting audio input, whose gain is set by the external feedback network (Av = 2×Rf/Ri)."
      },
      {
        "number": "5",
        "name": "VO1",
        "type": "output",
        "description": "Audio output 1 of the bridge-tied-load (BTL) pair, driving the load together with VO2 so that no DC-blocking output capacitor is needed."
      },
      {
        "number": "6",
        "name": "VDD",
        "type": "power_in",
        "description": "Positive supply pin with an operating range of 1.9 V to 5.5 V and an absolute maximum rating of 6.0 V, to be bypassed close to the pin (typically 10 µF electrolytic in parallel with 0.1 µF ceramic)."
      },
      {
        "number": "7",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference for the supply and the amplifier."
      },
      {
        "number": "8",
        "name": "VO2",
        "type": "output",
        "description": "Audio output 2 of the bridge-tied-load (BTL) pair, driven in opposition to VO1."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-haiku-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The datasheet is in Chinese; pin descriptions are my translations of the pin-definition table on pag; The datasheet gives no electrical pin types; the KiCad ERC classes were assigned from the function d; The datasheet states that SOP-8 shares the pinout of DIP-8, ESOP-8, MSOP-8 and EMSOP-8, so this pino"
        ],
        "pages_sent": 14,
        "cost_usd": 0.0491,
        "at": "2026-10-17T16:41:02"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8758046069568102400",
        "pages": 14,
        "sha256": "c60515bfc5169e9f",
        "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": "lm4871m.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          4.9,
          1.75
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "07f46cff378d30e6c27dfd5a03092c795323f86d91c71fc7e743f4f418dc553a",
        "checked": "2026-10-17",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "lm4871m-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
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          1.75
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "b526eab171fd49ed4e1dde46d49dea00c72ba6d7341366c41dca014a188e896c",
        "checked": "2026-10-17",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}