TL431AF

{
  "slug": "tl431af",
  "version": "0.1.0",
  "type": "component",
  "description": "HTC Korea TAEJIN Tech Voltage Reference, SOT-89-3. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "power management (pmic)",
    "tl431af",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "tl431af.kicad_sym",
    "tl431af.kicad_mod",
    "tl431af.glb",
    "tl431af.step",
    "tl431af.lbr",
    "docs/hero.png",
    "docs/tl431af-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "tl431af-hero.glb",
    "tl431af-hero.overlay.json",
    "tl431af-etched.glb"
  ],
  "component": {
    "mpn": "TL431AF",
    "manufacturer": "HTC Korea TAEJIN Tech",
    "package": "SOT-89-3",
    "pin_count": 3,
    "category": "Power Management (PMIC)",
    "subcategory": "Voltage Reference",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586183374972706816",
    "parts": {
      "symbol": "tl431af.kicad_sym",
      "footprint": "tl431af.kicad_mod",
      "model_3d": "tl431af-hero.glb",
      "model_3d_plain": "tl431af-etched.glb",
      "model_3d_step": "tl431af-etched.step",
      "model_3d_step_plain": "tl431af.step",
      "lbr": "tl431af.lbr"
    },
    "distributor_links": {
      "lcsc": "C126094"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T18:11:42Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "Reference",
        "type": "input",
        "description": "Reference voltage input of the shunt regulator, nominally 2.495 V (TL431A tolerance 2.470 to 2.520 V at VKA = VREF, IK = 10 mA), with reference input current IREF of 1.8 uA typical and 4.0 uA maximum."
      },
      {
        "number": "2",
        "name": "Anode",
        "type": "power_in",
        "description": "Ground connection of the device, which must carry the cathode current back to the circuit ground, with cathode current held at or above the 0.5 mA minimum for regulation (IK(MIN))."
      },
      {
        "number": "3",
        "name": "Cathode",
        "type": "power_in",
        "description": "Cathode is the regulated shunt node, recommended for operation from VREF up to 40 V with cathode current of 0.5 to 100 mA, and the absolute maximum is 42 V and 150 mA continuous."
      }
    ],
    "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 SOT-89 pin-configuration drawing on page 4 is image-only and does not appear in the extracted te; The datasheet labels the Cathode as 'Input Supply Voltage' and the Anode as 'Ground'. I used power_i; The datasheet does not state a separate pinout for the TL431AF beyond the shared TO-92/SOT-23/SOT-89"
        ],
        "pages_sent": 12,
        "cost_usd": 0.0396,
        "at": "2026-10-18T18:09:47"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586183374972706816",
        "pages": 12,
        "sha256": "0a0d5fc0a3221190",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 3,
        "described": 3,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "tl431af.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          4.0,
          4.5,
          1.52
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.05,
        "footprint_binding": "identity",
        "sha256": "844c0bb504d0c383535d9845c6376fe7a4053241a2ede8d8ef694df3fcfc37c8",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "tl431af-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          4.0,
          4.5,
          1.52
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.05,
        "footprint_binding": "identity",
        "sha256": "ca2d306827d29621eee817471155e6696b6a5e7fa32c872498f5128d5644a80b",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}