LM386

{
  "schema_version": 1,
  "type": "component",
  "slug": "lm386",
  "title": "LM386",
  "brief": "TI mono low-voltage audio power amp, DIP-8. Gain 20-200, drives 8 ohm, 4-12 V. Datasheet-verified.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "amplifier",
    "audio",
    "power-amp",
    "speaker",
    "dip-8",
    "texas-instruments"
  ],
  "component": {
    "mpn": "LM386",
    "manufacturer": "Texas Instruments",
    "package": "PDIP-8",
    "pin_count": 8,
    "category": "Amplifier",
    "subcategory": "Mono audio power amplifier",
    "datasheet": "https://www.ti.com/lit/ds/symlink/lm386.pdf",
    "parts": {
      "symbol": "lm386.kicad_sym",
      "footprint": "lm386.kicad_mod",
      "model_3d": "lm386-etched.glb",
      "model_3d_plain": "lm386.glb",
      "lbr": "lm386.lbr",
      "model_3d_step": "lm386-etched.step",
      "model_3d_step_plain": "lm386.step"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "GAIN",
        "type": "passive",
        "description": "Gain-setting pin (feedback network tap). Left open, an internal 1.35 kΩ resistor sets gain to 20 (26 dB). Placing a capacitor from pin 1 to pin 8 bypasses the 1.35 kΩ and raises gain to 200 (46 dB); a series R+C between pins 1 and 8 sets any gain 20-200."
      },
      {
        "number": "2",
        "name": "-INPUT",
        "type": "input",
        "description": "Inverting audio input. Ground-referenced; internal 50 kΩ resistor to ground biases the input. Typical input bias current 250 nA; input resistance 50 kΩ. Maximum analog input voltage ±0.4 V."
      },
      {
        "number": "3",
        "name": "+INPUT",
        "type": "input",
        "description": "Noninverting audio input. Ground-referenced; internal 50 kΩ resistor to ground biases the input. Typical input bias current 250 nA; input resistance 50 kΩ. Maximum analog input voltage ±0.4 V."
      },
      {
        "number": "4",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference for the amplifier. All input signals and the internal bias network are referenced to this pin."
      },
      {
        "number": "5",
        "name": "VOUT",
        "type": "output",
        "description": "Class-AB audio output. Self-centers at approximately VS/2 at quiescence. Drives 4-32 Ω speaker loads; typical output power 325 mW (VS = 6 V, RL = 8 Ω) up to 1 W (VS = 16 V, RL = 32 Ω, LM386N-4). Typical output should be AC-coupled to the load via a large series capacitor."
      },
      {
        "number": "6",
        "name": "VS",
        "type": "power_in",
        "description": "Positive supply voltage. Recommended 4-12 V (LM386N-1/-3/M-1/MX-1/MM-1) or 5-18 V (LM386N-4). Absolute maximum 15 V (or 22 V for LM386N-4). Quiescent current ~4 mA. Bypass locally with a 0.05 µF decoupling cap for stability."
      },
      {
        "number": "7",
        "name": "BYPASS",
        "type": "passive",
        "description": "Internal bias-network bypass node. Connect a bypass capacitor (typ. 10 µF) from this pin to ground to improve power-supply rejection (PSRR increases from ~10 dB with no cap to ~50 dB with 10 µF at 1 kHz). May be left open if PSRR is not critical."
      },
      {
        "number": "8",
        "name": "GAIN",
        "type": "passive",
        "description": "Second gain-setting pin. Paired with pin 1: an external capacitor (optionally in series with a resistor) between pins 1 and 8 bypasses the internal 1.35 kΩ feedback resistor, raising the closed-loop gain from 20 up to 200."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://www.ti.com/lit/ds/symlink/lm386.pdf",
        "pages": 34,
        "sha256": "b6019669384baef7",
        "source_tier": "mfr"
      },
      "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"
    }
  },
  "metadata": {
    "specs": {
      "Type": "Mono audio power amplifier",
      "Voltage gain": "20 (default) to 200 (via pins 1/8)",
      "Output power": "~325 mW into 8 Ω at 6 V",
      "Load": "8 Ω speaker (direct)",
      "Supply voltage": "4-12 V",
      "Quiescent current": "~4 mA",
      "Input": "ground-referenced",
      "Package": "PDIP-8"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "lm386",
    "audio power amplifier",
    "speaker amplifier",
    "low voltage audio amp"
  ],
  "discovery_pitch": "LM386 mono low-voltage audio power amplifier (DIP-8) with datasheet-verified pinout, KiCad symbol/footprint/3D, and full provenance.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "lm386.kicad_sym",
    "lm386.kicad_mod",
    "lm386.glb",
    "lm386.lbr",
    "docs/hero.png",
    "docs/lm386-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "lm386-etched.step"
  ],
  "variants": [
    {
      "mpn": "LM386N-1 (PDIP-8)",
      "kind": "packaging"
    },
    {
      "mpn": "LM386N-4 (PDIP-8, higher supply)",
      "kind": "packaging"
    }
  ]
}