LM386BM-1

{
  "slug": "lm386bm-1",
  "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",
    "lm386bm-1",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "lm386bm-1.kicad_sym",
    "lm386bm-1.kicad_mod",
    "lm386bm-1.glb",
    "lm386bm-1.step",
    "lm386bm-1.lbr",
    "docs/hero.png",
    "docs/lm386bm-1-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "lm386bm-1-hero.glb",
    "lm386bm-1-hero.overlay.json",
    "lm386bm-1-etched.glb"
  ],
  "component": {
    "mpn": "LM386BM-1",
    "manufacturer": "HGSEMI",
    "package": "SOP-8",
    "pin_count": 8,
    "category": "Amplifiers/Comparators",
    "subcategory": "Audio Amplifiers",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8758141740933505024",
    "parts": {
      "symbol": "lm386bm-1.kicad_sym",
      "footprint": "lm386bm-1.kicad_mod",
      "model_3d": "lm386bm-1-hero.glb",
      "model_3d_plain": "lm386bm-1-etched.glb",
      "model_3d_step": "lm386bm-1-etched.step",
      "model_3d_step_plain": "lm386bm-1.step",
      "lbr": "lm386bm-1.lbr"
    },
    "distributor_links": {
      "lcsc": "C7432386"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T15:35:32Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "GAIN",
        "type": "passive",
        "description": "Gain-control pin: with pins 1 and 8 open the internal 1.35k resistor sets a voltage gain of 20 (26 dB), and a capacitor between pins 1 and 8 raises the gain to 200 (46 dB) while a series R-C between them gives any gain from 20 to 200."
      },
      {
        "number": "2",
        "name": "IN-",
        "type": "input",
        "description": "Inverting input, referenced to ground through an internal 50k resistor, with input bias current of about 250 nA; the unused input must be bypassed to ground when operating at high gain to avoid gain loss or instability."
      },
      {
        "number": "3",
        "name": "IN+",
        "type": "input",
        "description": "Non-inverting input, referenced to ground through an internal 50k resistor, with input bias current of about 250 nA; the unused input must be bypassed to ground when operating at high gain to avoid gain loss or instability."
      },
      {
        "number": "4",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference pin for the device, to which the inputs are referenced."
      },
      {
        "number": "5",
        "name": "VOUT",
        "type": "output",
        "description": "Amplifier output, automatically biased to half the supply voltage, which drives the 8 Ω load (output power 250 mW min at Vcc=6 V and 500 mW min at Vcc=9 V at 10% THD)."
      },
      {
        "number": "6",
        "name": "Vs",
        "type": "power_in",
        "description": "Supply pin, operating range 4 V to 12 V, with an absolute maximum supply voltage of 15 V."
      },
      {
        "number": "7",
        "name": "BYPASS",
        "type": "passive",
        "description": "Bypass pin whose external capacitor (10 µF in the datasheet test conditions) sets the supply ripple rejection (PSRR 50 dB typ at 1 kHz)."
      },
      {
        "number": "8",
        "name": "GAIN",
        "type": "passive",
        "description": "Gain-control pin paired with pin 1: with both pins open the gain is 20 (26 dB), and a capacitor between pins 1 and 8 bypasses the 1.35k resistor to raise the gain to 200 (46 dB)."
      }
    ],
    "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 gives one pin table shared by DIP-8, SOP-8 and MSOP-8; the ordering table on page 1 li; The datasheet does not give electrical pin types (input/output/power/passive). Types for pins 1, 7 a; The pin 7 BYPASS description draws its PSRR and capacitor value from the electrical-characteristics ",
          "3/8 pins cited to the wrong page (name found elsewhere): ['1:GAIN@p6', '3:IN+@p6', '8:GAIN@p6']"
        ],
        "pages_sent": 10,
        "cost_usd": 0.0386,
        "at": "2026-10-18T15:33:20"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8758141740933505024",
        "pages": 10,
        "sha256": "3500d8afa6a2f178",
        "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": [
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        "file": "lm386bm-1.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "07f46cff378d30e6c27dfd5a03092c795323f86d91c71fc7e743f4f418dc553a",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "lm386bm-1-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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        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "d3cf562f87899f9813370ff6b425109e2efa3de61d511f7612d9005fc3379d91",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}