TL431CDR

{
  "slug": "tl431cdr",
  "version": "0.1.0",
  "type": "component",
  "description": "Texas Instruments Voltage Reference, SOIC-8. Datasheet-verified pinout, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "power management (pmic)",
    "tl431cdr",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "tl431cdr.kicad_sym",
    "tl431cdr.kicad_mod",
    "tl431cdr.glb",
    "tl431cdr.step",
    "tl431cdr.lbr",
    "docs/hero.png",
    "docs/tl431cdr-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "component": {
    "mpn": "TL431CDR",
    "manufacturer": "Texas Instruments",
    "package": "SOIC-8",
    "pin_count": 8,
    "category": "Power Management (PMIC)",
    "subcategory": "Voltage Reference",
    "datasheet": "https://www.ti.com/lit/ds/symlink/tl431c.pdf",
    "parts": {
      "symbol": "tl431cdr.kicad_sym",
      "footprint": "tl431cdr.kicad_mod",
      "model_3d": "tl431cdr-etched.glb",
      "model_3d_plain": "tl431cdr.glb",
      "model_3d_step": "tl431cdr-etched.step",
      "model_3d_step_plain": "tl431cdr.step",
      "lbr": "tl431cdr.lbr"
    },
    "distributor_links": {
      "lcsc": "C6972"
    },
    "pins": [
      {
        "number": "1",
        "name": "CATHODE",
        "type": "output",
        "description": "Output terminal supporting 1 to 100 mA continuous shunt current sink with programmable voltage from Vref (approximately 2.5V) to 36V and 0.2Ω typical output impedance."
      },
      {
        "number": "2",
        "name": "ANODE",
        "type": "power_in",
        "description": "Common ground return pin for regulator; must be connected to system ground with all other ANODE pins for proper current distribution."
      },
      {
        "number": "3",
        "name": "ANODE",
        "type": "power_in",
        "description": "Common ground return pin for regulator; must be connected to system ground with all other ANODE pins for proper current distribution."
      },
      {
        "number": "4",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection; leave unconnected per datasheet specifications."
      },
      {
        "number": "5",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection; leave unconnected per datasheet specifications."
      },
      {
        "number": "6",
        "name": "ANODE",
        "type": "power_in",
        "description": "Common ground return pin for regulator; must be connected to system ground with all other ANODE pins for proper current distribution."
      },
      {
        "number": "7",
        "name": "ANODE",
        "type": "power_in",
        "description": "Common ground return pin for regulator; must be connected to system ground with all other ANODE pins for proper current distribution."
      },
      {
        "number": "8",
        "name": "REF",
        "type": "input",
        "description": "Reference input pin with nominal threshold of 2.495V requiring 2 to 4 µA input current for linear operation as feedback node to set regulator output voltage."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.2",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.2",
        "primary_model": "claude-haiku-4-5-20251001",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: Multiple ANODE pins (2, 3, 6, 7) require connection to common ground point; improper grounding can a; Absolute maximum cathode voltage is 37V per Page 5; nominal operating voltage range is Vref (2.5V) t"
        ],
        "pages_sent": 85,
        "cost_usd": 0.8733,
        "at": "2026-09-22T22:16:09"
      },
      "datasheet": {
        "url": "https://www.ti.com/lit/ds/symlink/tl431c.pdf",
        "pages": 85,
        "sha256": "ed2e90697de4e2c5",
        "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"
    },
    "models_3d": [
      {
        "file": "tl431cdr.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": "tl431cdr-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "e34bcb3d75e171e0dee81ad4bc75334d5c3b54e0af011d253b6e7d2f69594f38",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}