lm4861mx

{
  "slug": "lm4861mx",
  "version": "0.1.0",
  "type": "component",
  "description": "Texas Instruments Audio Power OpAmps, SOIC-8. Datasheet-verified pinout, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "op-amp-cmp",
    "lm4861mx"
  ],
  "dependencies": {},
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    "path": "docs/hero.png"
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    "lm4861mx.lbr",
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    "docs/lm4861mx-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
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  "visibility": {
    "public": true
  },
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "component": {
    "mpn": "LM4861MX",
    "manufacturer": "Texas Instruments",
    "package": "SOIC-8",
    "pin_count": 8,
    "category": "Audio Power OpAmps",
    "datasheet": "https://www.ti.com/lit/ds/symlink/lm4861mx.pdf",
    "parts": {
      "symbol": "lm4861mx.kicad_sym",
      "footprint": "lm4861mx.kicad_mod",
      "model_3d": "lm4861mx-etched.glb",
      "model_3d_plain": "lm4861mx.glb",
      "model_3d_step": "lm4861mx-etched.step",
      "model_3d_step_plain": "lm4861mx.step",
      "lbr": "lm4861mx.lbr"
    },
    "pins": [
      {
        "number": "1",
        "name": "SHUTDOWN",
        "type": "input",
        "description": "Active-high shutdown control. Drive to VDD to disable the amplifier (typical shutdown current 0.6µA); drive to GND to enable. Must not be left floating - no internal pull-down exists. An external 47kΩ pull-up can be used with a switch to GND to enable."
      },
      {
        "number": "2",
        "name": "BYPASS",
        "type": "passive",
        "description": "Half-supply (VDD/2) internal reference bypass node. Connect an external bypass capacitor CB (typ 1.0µF) from this pin to GND to filter the half-supply reference; larger CB improves low-frequency THD+N."
      },
      {
        "number": "3",
        "name": "+IN",
        "type": "input",
        "description": "Non-inverting input of the first (gain-configurable) amplifier. Typically tied to the BYPASS (VDD/2) node through a resistor in bridged applications so the amplifier's input is biased at half-supply."
      },
      {
        "number": "4",
        "name": "-IN",
        "type": "input",
        "description": "Inverting input of the first amplifier. Closed-loop differential gain is set by Rf/Ri (Avd = 2·Rf/Ri); connect the audio input through a coupling capacitor Ci and series resistor Ri, with feedback resistor Rf from Vo1 to this pin."
      },
      {
        "number": "5",
        "name": "Vo1",
        "type": "output",
        "description": "Output of the first (gain-configurable) amplifier. One side of the bridge-tied load; biased at VDD/2. Drives the 8Ω load differentially with Vo2 (180° out of phase). Delivers up to 1.1W (1% THD+N) into 8Ω at VDD = 5V."
      },
      {
        "number": "6",
        "name": "VDD",
        "type": "power_in",
        "description": "Positive supply voltage input, 2.0V to 5.5V operating range (6.0V absolute maximum). Typical quiescent current 6.5mA. Bypass locally with a 0.1µF ceramic capacitor as close as possible to the pin for low-noise operation and high PSRR."
      },
      {
        "number": "7",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference return. All voltages are measured with respect to this pin."
      },
      {
        "number": "8",
        "name": "Vo2",
        "type": "output",
        "description": "Output of the second amplifier, internally fixed at unity gain in an inverting configuration (Av = -1) via two internal 40kΩ resistors. Forms the second half of the bridge-tied load with Vo1; biased at VDD/2 and 180° out of phase with Vo1. In single-ended use, load with a 0.1µF + 2kΩ dummy network for stability."
      }
    ],
    "provenance": {
      "rebuilt": "component block rebuilt 2026-10-05 from this page's own README pinout table and .kicad_sym (pins cross-checked), no re-extraction"
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "distributor_links": {
      "lcsc": "C2862010",
      "digikey": "LM4861MXTR-ND",
      "mouser": "926-LM4861MX"
    },
    "distributor_check": {
      "checked_at": "2026-10-05T19:04:44Z",
      "source": "Component Ocean /api/assign-pns + lcsc_map",
      "digikey": {
        "pn": "LM4861MXTR-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "926-LM4861MX",
        "status": "found"
      }
    },
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        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
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          6.0,
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        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
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  },
  "metadata": {
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": null,
      "rows": [
        {
          "name": "Supply Voltage",
          "symbol": "VDD",
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          "unit": "V",
          "min": 2,
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        },
        {
          "name": "Quiescent Power Supply Current",
          "symbol": "IDD",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 6.5,
          "max": 10,
          "conditions": "VIN = 0V, IO = 0A",
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        {
          "name": "Shutdown Current",
          "symbol": "ISD",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 0.6,
          "max": 10,
          "conditions": "VSHUTDOWN = VDD",
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        {
          "name": "Output Offset Voltage",
          "symbol": "VOS",
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          "unit": "mV",
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          "max": 50,
          "conditions": "VIN = 0V",
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        {
          "name": "Output Power",
          "symbol": "PO",
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          "unit": "W",
          "min": 1,
          "typ": 1.1,
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          "conditions": "THD = 1% (max); f = 1 kHz",
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        {
          "name": "Temperature Range",
          "symbol": "TA",
          "kind": "recommended_operating",
          "unit": "°C",
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          "conditions": "TMIN ≤ TA ≤ TMAX",
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          "name": "Thermal Resistance Junction-to-Case",
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}