lm4875mx

{
  "slug": "lm4875mx",
  "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",
    "lm4875mx"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "lm4875mx.kicad_sym",
    "lm4875mx.kicad_mod",
    "lm4875mx.glb",
    "lm4875mx.step",
    "lm4875mx.lbr",
    "docs/hero.png",
    "docs/lm4875mx-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "lm4875mx-etched.step"
  ],
  "visibility": {
    "public": true
  },
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "component": {
    "mpn": "LM4875MX",
    "manufacturer": "Texas Instruments",
    "package": "SOIC-8",
    "pin_count": 8,
    "category": "Audio Power OpAmps",
    "datasheet": "https://www.ti.com/lit/ds/symlink/lm4875mx.pdf",
    "parts": {
      "symbol": "lm4875mx.kicad_sym",
      "footprint": "lm4875mx.kicad_mod",
      "model_3d": "lm4875mx-etched.glb",
      "model_3d_plain": "lm4875mx.glb",
      "model_3d_step": "lm4875mx-etched.step",
      "model_3d_step_plain": "lm4875mx.step",
      "lbr": "lm4875mx.lbr"
    },
    "pins": [
      {
        "number": "1",
        "name": "VO1",
        "type": "output",
        "description": "Amp1 (non-inverting bridge half) audio output. Drives one side of the bridged 8 Ω speaker and, in headphone mode, drives the single-ended headphone load referenced to GND. Biased at VDD/2 in bridge mode."
      },
      {
        "number": "2",
        "name": "BYPASS",
        "type": "passive",
        "description": "Half-supply (VDD/2) bias-node bypass pin. A capacitor CB (typically 1.0 µF) from this pin to GND filters the internal bias reference and sets the click/pop turn-on time (~280 ms with 1.0 µF). Larger CB improves PSRR."
      },
      {
        "number": "3",
        "name": "HP-Sense",
        "type": "input",
        "description": "Headphone-sense control input. VIL ≤ 0.8 V places the amplifier in bridged speaker mode; VIH ≥ 4 V (up to VCC) mutes Amp2, disconnects the bridge load, and enables single-ended headphone drive from VO1. Typically driven by a headphone-jack switch contact through a resistor divider."
      },
      {
        "number": "4",
        "name": "DC Vol/SD",
        "type": "input",
        "description": "DC voltage volume control and shutdown pin. Input range GND to VDD sets gain from about −72 dB (VPIN4 ≤ 0.9 V, 20% VDD) up to +20 dB (VPIN4 ≥ 4.0 V, 80% VDD). Applying <300 mV activates the 0.7 µA micropower shutdown; 500 mV-1 V asserts mute (~75 dB attenuation)."
      },
      {
        "number": "5",
        "name": "-IN",
        "type": "input",
        "description": "Inverting audio input to Amp1. Drive through an input coupling capacitor Ci (blocks DC and forms a highpass with the internal 10 kΩ-110 kΩ input resistor RIN, which varies with the DC Vol/SD setting). Amp1's closed-loop gain is set by the DC Vol/SD voltage."
      },
      {
        "number": "6",
        "name": "GND",
        "type": "power_in",
        "description": "Device ground / analog reference. All voltages in the datasheet are measured with respect to this pin."
      },
      {
        "number": "7",
        "name": "VDD",
        "type": "power_in",
        "description": "Positive supply rail. Operating range 2.7 V to 5.5 V (absolute max 6.0 V). Quiescent current 4 mA typ (bridge mode) / 3.5 mA typ (headphone mode). Bypass close to the pin with 10 µF and 0.1 µF capacitors to GND for low noise and high PSRR."
      },
      {
        "number": "8",
        "name": "VO2",
        "type": "output",
        "description": "Amp2 (inverting bridge half) audio output. Drives the second side of the bridge-mode 8 Ω speaker with a signal 180° out of phase with VO1 (fixed −1 gain vs Amp1). Muted (Amp2 off) when HP-Sense is driven high."
      }
    ],
    "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": {
      "digikey": false,
      "mouser": "926-LM4875MX"
    },
    "distributor_check": {
      "checked_at": "2026-10-05T19:04:46Z",
      "source": "Component Ocean /api/assign-pns + lcsc_map",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": "926-LM4875MX",
        "status": "found"
      }
    },
    "models_3d": [
      {
        "file": "lm4875mx.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": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "lm4875mx-etched.step",
        "role": "eda",
        "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": "8b388e5a34b17106e1aad851963b7b06e4e8c04d379b50f0ca53e2359e567b56",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}