TL432BQPK

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  "type": "component",
  "slug": "tl432bqpk",
  "title": "TL432BQPK",
  "brief": "Texas Instruments Voltage Reference, SOT-89-3. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
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  "component": {
    "mpn": "TL432BQPK",
    "manufacturer": "Texas Instruments",
    "package": "SOT-89-3",
    "pin_count": 3,
    "category": "Power Management (PMIC)",
    "subcategory": "Voltage Reference",
    "datasheet": "https://www.ti.com/cn/lit/gpn/tl431",
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    "distributor_links": {
      "lcsc": "C2863573",
      "digikey": "296-18244-2-ND",
      "mouser": "595-TL432BQPK"
    },
    "distributor_check": {
      "checked_at": "2026-10-12T10:00:18Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "296-18244-2-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "595-TL432BQPK",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "CATHODE",
        "type": "bidirectional",
        "description": "Shunt current/voltage input, recommended for 1 mA to 100 mA cathode current and up to 36 V, with absolute limits of -100 mA to 150 mA and 37 V."
      },
      {
        "number": "2",
        "name": "ANODE",
        "type": "passive",
        "description": "Common pin, normally grounded, to which all cathode and REF voltages are referenced."
      },
      {
        "number": "3",
        "name": "REF",
        "type": "input",
        "description": "Reference input regulated to about 2.5 V relative to ANODE; it must not float because IREF ≥ 4 µA is required, and its absolute input current range is -0.05 mA to 10 mA."
      }
    ],
    "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 (PK) figure for TL432 is printed without pin numbers. The pin numbers above are derived f; Table 5-1 lists ANODE as type 'O' (output), but the datasheet describes it as a common pin normally ; The TL432 PK pin list in the figure text appears identical in label order to TL431 PK, while the dat"
        ],
        "pages_sent": 35,
        "cost_usd": 0.2152,
        "at": "2026-10-12T10:00:03"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/tl431",
        "pages": 86,
        "sha256": "313277b9351e61ed",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 3,
        "described": 3,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
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      "footprint": "viewers/footprint.html"
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        "role": "plain",
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        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          4,
          4.5,
          1.52
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0.05,
        "footprint_binding": "identity",
        "sha256": "844c0bb504d0c383535d9845c6376fe7a4053241a2ede8d8ef694df3fcfc37c8",
        "checked": "2026-10-12",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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        "checked": "2026-10-12",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "SOT-89-3",
      "Category": "Power Management (PMIC)",
      "Pins": "3"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "313277b9351e61ed",
      "rows": [
        {
          "name": "Reference voltage (TL431BQ/TL432BQ, 0.5% grade)",
          "symbol": "Vref",
          "kind": "electrical",
          "unit": "mV",
          "min": 2483,
          "typ": 2495,
          "max": 2507,
          "conditions": "VKA = Vref, IKA = 10mA, TA = 25°C",
          "source_page": 15,
          "source": "datasheet"
        },
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          "name": "Reference voltage deviation over temperature range",
          "symbol": "VI(dev)",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 14,
          "max": 34,
          "conditions": "VKA = Vref, IKA = 10mA",
          "source_page": 15,
          "source": "datasheet"
        },
        {
          "name": "Reference voltage change per cathode voltage change, 10V to Vref",
          "symbol": "ΔVref/ΔVKA",
          "kind": "electrical",
          "unit": "mV/V",
          "min": null,
          "typ": -1.4,
          "max": -2.7,
          "conditions": "IKA = 10mA, ΔVKA = 10V - Vref",
          "source_page": 15,
          "source": "datasheet"
        },
        {
          "name": "Reference voltage change per cathode voltage change, 36V to 10V",
          "symbol": "ΔVref/ΔVKA",
          "kind": "electrical",
          "unit": "mV/V",
          "min": null,
          "typ": -1,
          "max": -2,
          "conditions": "IKA = 10mA, ΔVKA = 36V - 10V",
          "source_page": 15,
          "source": "datasheet"
        },
        {
          "name": "Reference input current",
          "symbol": "Iref",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 2,
          "max": 4,
          "conditions": "IKA = 10mA, R1 = 10kΩ, R2 = ∞",
          "source_page": 15,
          "source": "datasheet"
        },
        {
          "name": "Reference input current deviation over temperature range",
          "symbol": "II(dev)",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 0.8,
          "max": 2.5,
          "conditions": "IKA = 10mA, R1 = 10kΩ, R2 = ∞",
          "source_page": 15,
          "source": "datasheet"
        },
        {
          "name": "Minimum cathode current for regulation",
          "symbol": "Imin",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 0.4,
          "max": 0.7,
          "conditions": "VKA = Vref",
          "source_page": 15,
          "source": "datasheet"
        },
        {
          "name": "Off-state cathode current",
          "symbol": "Ioff",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 0.1,
          "max": 0.5,
          "conditions": "VKA = 36V, Vref = 0",
          "source_page": 15,
          "source": "datasheet"
        },
        {
          "name": "Dynamic impedance",
          "symbol": "|ZKA|",
          "kind": "electrical",
          "unit": "Ω",
          "min": null,
          "typ": 0.2,
          "max": 0.5,
          "conditions": "VKA = Vref, f ≤ 1kHz, IKA = 1mA to 100mA",
          "source_page": 15,
          "source": "datasheet"
        },
        {
          "name": "Cathode voltage (absolute maximum)",
          "symbol": "VKA",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 37,
          "conditions": "All voltages referenced to ANODE",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Continuous cathode current range (absolute maximum)",
          "symbol": "IKA",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": -100,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Reference input current (absolute maximum)",
          "symbol": "II(ref)",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": -0.05,
          "typ": null,
          "max": 10,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Operating junction temperature range (absolute maximum)",
          "symbol": "TJ",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Storage temperature range",
          "symbol": "Tstg",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Cathode voltage (recommended)",
          "symbol": "VKA",
          "kind": "recommended_operating",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 36,
          "conditions": "Minimum printed as Vref; no numeric minimum given",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Continuous cathode current range (recommended)",
          "symbol": "IKA",
          "kind": "recommended_operating",
          "unit": "mA",
          "min": 1,
          "typ": null,
          "max": 100,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Operating free-air temperature range (TL43xxQ)",
          "symbol": "TA",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 125,
          "conditions": "TL43xxQ grade, natural convection",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Junction-to-ambient thermal resistance (PK package)",
          "symbol": "RθJA",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 52,
          "max": null,
          "conditions": "PK package, natural convection",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Junction-to-case (top) thermal resistance (PK package)",
          "symbol": "RθJC(top)",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 9,
          "max": null,
          "conditions": "PK package",
          "source_page": 6,
          "source": "datasheet"
        }
      ]
    }
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  "discovery_pitch": "TL432BQPK (Texas Instruments) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
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