TPA321D

{
  "slug": "tpa321d",
  "version": "0.1.0",
  "type": "component",
  "description": "Texas Instruments Audio Amplifiers, SOIC-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "amplifiers-comparators",
    "tpa321d",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "tpa321d.kicad_sym",
    "tpa321d.kicad_mod",
    "tpa321d.glb",
    "tpa321d.step",
    "tpa321d.lbr",
    "docs/hero.png",
    "docs/tpa321d-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "tpa321d-hero.glb",
    "tpa321d-hero.overlay.json"
  ],
  "component": {
    "mpn": "TPA321D",
    "manufacturer": "Texas Instruments",
    "package": "SOIC-8",
    "pin_count": 8,
    "category": "Amplifiers/Comparators",
    "subcategory": "Audio Amplifiers",
    "datasheet": "https://www.ti.com/cn/lit/gpn/tpa321",
    "parts": {
      "symbol": "tpa321d.kicad_sym",
      "footprint": "tpa321d.kicad_mod",
      "model_3d": "tpa321d-hero.glb",
      "model_3d_plain": "tpa321d.glb",
      "model_3d_step": "tpa321d-etched.step",
      "model_3d_step_plain": "tpa321d.step",
      "lbr": "tpa321d.lbr"
    },
    "distributor_links": {
      "lcsc": "C2873032",
      "digikey": "296-7012-5-ND",
      "mouser": "595-TPA321D"
    },
    "distributor_check": {
      "checked_at": "2026-10-10T19:58:09Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "296-7012-5-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "595-TPA321D",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "SHUTDOWN",
        "type": "input",
        "description": "SHUTDOWN places the entire device in shutdown mode when held high (IDD about 0.15 µA), with VIH of at least 0.9 VDD and VIL of at most 0.1 VDD."
      },
      {
        "number": "2",
        "name": "BYPASS",
        "type": "passive",
        "description": "BYPASS is the tap to the voltage divider for internal mid-supply bias and should be connected to a 0.1-µF to 1-µF capacitor when used as an audio amplifier."
      },
      {
        "number": "3",
        "name": "IN+",
        "type": "input",
        "description": "IN+ is the noninverting input and is typically tied to the BYPASS terminal for single-ended (SE) operation."
      },
      {
        "number": "4",
        "name": "IN-",
        "type": "input",
        "description": "IN- is the inverting input and is typically used as the audio input terminal."
      },
      {
        "number": "5",
        "name": "VO+",
        "type": "output",
        "description": "VO+ is the positive bridge-tied load (BTL) audio output."
      },
      {
        "number": "6",
        "name": "VDD",
        "type": "power_in",
        "description": "VDD is the supply voltage terminal, specified from 2.5 V to 5.5 V with absolute maximum 6 V."
      },
      {
        "number": "7",
        "name": "GND",
        "type": "power_in",
        "description": "GND is the ground connection."
      },
      {
        "number": "8",
        "name": "VO-",
        "type": "output",
        "description": "VO- is the negative bridge-tied load (BTL) audio output."
      }
    ],
    "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's Terminal Functions table labels BYPASS as 'I' (input). I classified it as passive be; The datasheet's VDD range (2.5 V to 5.5 V) and 6 V absolute maximum are taken from the Recommended O; The datasheet covers both the D (SOIC-8) and DGN (MSOP/HVSSOP-8) packages. The pin numbers above app"
        ],
        "pages_sent": 8,
        "cost_usd": 0.0396,
        "at": "2026-10-10T19:57:50"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/tpa321",
        "pages": 33,
        "sha256": "66e3086d33d8de30",
        "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": [
      {
        "file": "tpa321d.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": "2026-10-10",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "tpa321d-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": "54f64cbd2b4fa59d6ebb322da268b716436ddb8f2507bf3e70b420222545de20",
        "checked": "2026-10-10",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}