LM386BM-1

{
  "schema_version": 1,
  "type": "component",
  "slug": "lm386bm-1",
  "title": "LM386BM-1",
  "brief": "HGSEMI Audio Amplifiers, SOP-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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    "amplifiers-comparators",
    "lm386bm-1",
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  "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": {
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      "lbr": "lm386bm-1.lbr"
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    "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"
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      "datasheet": {
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        "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": {
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      "footprint": "viewers/footprint.html"
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        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          4.9,
          1.75
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "07f46cff378d30e6c27dfd5a03092c795323f86d91c71fc7e743f4f418dc553a",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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        "sha256": "d3cf562f87899f9813370ff6b425109e2efa3de61d511f7612d9005fc3379d91",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "HGSEMI",
      "Package": "SOP-8",
      "Category": "Amplifiers/Comparators",
      "Pins": "8"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "3500d8afa6a2f178f444834f6beb461d54f1e698066215f7ef7c6beaa12398d0",
      "rows": [
        {
          "name": "Operating supply voltage",
          "symbol": "Vcc",
          "kind": "electrical",
          "unit": "V",
          "min": 4,
          "typ": null,
          "max": 12,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Static supply current",
          "symbol": "Icc",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 4,
          "max": 8,
          "conditions": "Vcc=6V, VIN=0",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Output power",
          "symbol": "Po",
          "kind": "electrical",
          "unit": "mW",
          "min": 250,
          "typ": 325,
          "max": null,
          "conditions": "Vcc=6V, RL=8Ω, THD=10%",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Output power",
          "symbol": "Po",
          "kind": "electrical",
          "unit": "mW",
          "min": 500,
          "typ": 700,
          "max": null,
          "conditions": "Vcc=9V, RL=8Ω, THD=10%",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Max input voltage",
          "symbol": "VIN",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.4,
          "typ": null,
          "max": 0.4,
          "conditions": "",
          "source_page": 3,
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        },
        {
          "name": "Supply voltage",
          "symbol": "Vcc",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
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          "conditions": "",
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        },
        {
          "name": "Maximum allowable power dissipation",
          "symbol": "PD",
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          "unit": "mW",
          "min": null,
          "typ": null,
          "max": 660,
          "conditions": "",
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        },
        {
          "name": "Soldering temperature",
          "symbol": "Ts",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": null,
          "typ": null,
          "max": 260,
          "conditions": "10 s",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Junction temperature",
          "symbol": "Tj",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": null,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Operating temperature",
          "symbol": "Tamb",
          "kind": "recommended_operating",
          "unit": "℃",
          "min": 0,
          "typ": null,
          "max": 70,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Storage temperature",
          "symbol": "Tstg",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": -40,
          "typ": null,
          "max": 125,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Voltage gain",
          "symbol": "Av",
          "kind": "electrical",
          "unit": "dB",
          "min": null,
          "typ": 26,
          "max": null,
          "conditions": "Vcc=6V, f=1kHz, pins 1 and 8 open",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Voltage gain with 10μF between pins 1 and 8",
          "symbol": "Av",
          "kind": "electrical",
          "unit": "dB",
          "min": null,
          "typ": 46,
          "max": null,
          "conditions": "Vcc=6V, f=1kHz, 10μF capacitor between pins 1 and 8",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Bandwidth",
          "symbol": "BW",
          "kind": "electrical",
          "unit": "kHz",
          "min": null,
          "typ": 300,
          "max": null,
          "conditions": "Vcc=6V, pins 1 and 8 open",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Total harmonic distortion",
          "symbol": "THD",
          "kind": "electrical",
          "unit": "%",
          "min": null,
          "typ": 0.2,
          "max": null,
          "conditions": "Vcc=6V, RL=8Ω, Po=125mW, f=1kHz, pins 1 and 8 open",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Power supply ripple rejection ratio",
          "symbol": "PSRR",
          "kind": "electrical",
          "unit": "dB",
          "min": null,
          "typ": 50,
          "max": null,
          "conditions": "Vcc=6V, f=1kHz, CBYPASS=10μF, pins 1 and 8 open, output referenced",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Input resistance",
          "symbol": "RIN",
          "kind": "electrical",
          "unit": "kΩ",
          "min": null,
          "typ": 50,
          "max": null,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Input bias current",
          "symbol": "IB",
          "kind": "electrical",
          "unit": "nA",
          "min": null,
          "typ": 250,
          "max": null,
          "conditions": "Vcc=6V, pins 2 and 3 open",
          "source_page": 4,
          "source": "datasheet"
        }
      ]
    }
  },
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  "discovery_triggers": [
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  "discovery_pitch": "LM386BM-1 (HGSEMI) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
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