main
Ray Set visibility: public 0bfbbdb 16d ago
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{
  "schema_version": 1,
  "type": "component",
  "slug": "tl431cdr2g",
  "title": "TL431CDR2G",
  "brief": "onsemi Voltage References, SOIC-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "power management ics",
    "tl431cdr2g",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "TL431CDR2G",
    "manufacturer": "onsemi",
    "package": "SOIC-8",
    "pin_count": 8,
    "category": "Power Management ICs",
    "subcategory": "Voltage References",
    "datasheet": "https://www.onsemi.com/pdf/datasheet/tl431c-d.pdf",
    "parts": {
      "symbol": "tl431cdr2g.kicad_sym",
      "footprint": "tl431cdr2g.kicad_mod",
      "model_3d": "tl431cdr2g-hero.glb",
      "model_3d_plain": "tl431cdr2g-etched.glb",
      "model_3d_step": "tl431cdr2g-etched.step",
      "model_3d_step_plain": "tl431cdr2g.step",
      "lbr": "tl431cdr2g.lbr"
    },
    "distributor_links": {
      "lcsc": "C146775"
    },
    "distributor_check": {
      "checked_at": "2026-10-23T18:11:50Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "deferred",
        "error": "shared DigiKey quota guard: 887 calls left today"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "Cathode",
        "type": "passive",
        "description": "Shunt regulator cathode, operating VKA from Vref to 36 V (37 V absolute max) with cathode current of 1.0 mA to 100 mA."
      },
      {
        "number": "2",
        "name": "Anode",
        "type": "passive",
        "description": "Anode (lowest-potential terminal of the shunt regulator), electrically common to the die attach flag with pins 3, 6 and 7."
      },
      {
        "number": "3",
        "name": "Anode",
        "type": "passive",
        "description": "Anode, electrically common to the die attach flag with pins 2, 6 and 7."
      },
      {
        "number": "4",
        "name": "N/C",
        "type": "unconnected",
        "description": "No internal connection."
      },
      {
        "number": "5",
        "name": "N/C",
        "type": "unconnected",
        "description": "No internal connection."
      },
      {
        "number": "6",
        "name": "Anode",
        "type": "passive",
        "description": "Anode, electrically common to the die attach flag with pins 2, 3 and 7."
      },
      {
        "number": "7",
        "name": "Anode",
        "type": "passive",
        "description": "Anode, electrically common to the die attach flag with pins 2, 3 and 6."
      },
      {
        "number": "8",
        "name": "Reference",
        "type": "input",
        "description": "Reference input that sets the output via an external divider (VKA = Vref(1+R1/R2)+Iref*R1), with Vref of about 2.495 V and reference input current range of -0.05 to +10 mA."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-sonnet-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The SOIC-8 pin-to-name assignment comes from a garbled text rendering of the top-view pin diagram on; The 'internally modified SOIC-8' note on page 1 sits near the Micro8 label, so it may apply to Micro"
        ],
        "pages_sent": 18,
        "cost_usd": 0.1836,
        "at": "2026-10-23T18:11:32"
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        "pages": 18,
        "sha256": "922e22f14c14db6a",
        "source_tier": "mfr"
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      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
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        "described": 8,
        "cites_pages": true,
        "refuses_to_fabricate": true
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        "seat": "z = 0",
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        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "07f46cff378d30e6c27dfd5a03092c795323f86d91c71fc7e743f4f418dc553a",
        "checked": "2026-10-23",
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        "sha256": "feb006d261f6dd3f8abea7a2b642cd97b41f14757fae348136576943219fe538",
        "checked": "2026-10-23",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "onsemi",
      "Package": "SOIC-8",
      "Category": "Power Management ICs",
      "Pins": "8"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "922e22f14c14db6a1f8c8074283a4b574680e333d55e5814d926cdca8f8dcf94",
      "rows": [
        {
          "name": "Reference Input Voltage",
          "symbol": "Vref",
          "kind": "electrical",
          "unit": "V",
          "min": 2.44,
          "typ": 2.495,
          "max": 2.55,
          "conditions": "VKA = Vref, IK = 10 mA, TA = 25°C",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Reference Input Voltage over temperature",
          "symbol": "Vref",
          "kind": "electrical",
          "unit": "V",
          "min": 2.423,
          "typ": null,
          "max": 2.567,
          "conditions": "VKA = Vref, IK = 10 mA, TA = Tlow to Thigh (0°C to 70°C)",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Reference Input Voltage Tolerance",
          "symbol": "",
          "kind": "tolerance",
          "unit": "%",
          "min": -2.2,
          "typ": null,
          "max": 2.2,
          "conditions": "TL431CDR2G ordering table",
          "source_page": 13,
          "source": "datasheet"
        },
        {
          "name": "Reference Input Voltage Deviation Over Temperature Range",
          "symbol": "ΔVref",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 3,
          "max": 17,
          "conditions": "VKA = Vref, IK = 10 mA",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Ratio of Change in Vref to Change in VKA",
          "symbol": "ΔVref/ΔVKA",
          "kind": "electrical",
          "unit": "mV/V",
          "min": null,
          "typ": -1.4,
          "max": -2.7,
          "conditions": "IK = 10 mA, VKA = 10 V to Vref",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Ratio of Change in Vref to Change in VKA",
          "symbol": "ΔVref/ΔVKA",
          "kind": "electrical",
          "unit": "mV/V",
          "min": null,
          "typ": -1,
          "max": -2,
          "conditions": "IK = 10 mA, VKA = 36 V to 10 V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Reference Input Current",
          "symbol": "Iref",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 1.8,
          "max": 4,
          "conditions": "IK = 10 mA, R1 = 10 k, R2 = ∞, TA = 25°C",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Reference Input Current over temperature",
          "symbol": "Iref",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": null,
          "max": 5.2,
          "conditions": "IK = 10 mA, R1 = 10 k, R2 = ∞, TA = Tlow to Thigh",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Reference Input Current Deviation Over Temperature Range",
          "symbol": "ΔIref",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 0.4,
          "max": 1.2,
          "conditions": "IK = 10 mA, R1 = 10 k, R2 = ∞",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Minimum Cathode Current For Regulation",
          "symbol": "Imin",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 0.5,
          "max": 1,
          "conditions": "VKA = Vref",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Off-State Cathode Current",
          "symbol": "Ioff",
          "kind": "electrical",
          "unit": "nA",
          "min": null,
          "typ": 20,
          "max": 1000,
          "conditions": "VKA = 36 V, Vref = 0 V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Dynamic Impedance",
          "symbol": "|ZKA|",
          "kind": "electrical",
          "unit": "Ω",
          "min": null,
          "typ": 0.22,
          "max": 0.5,
          "conditions": "VKA = Vref, IK = 1.0 mA to 100 mA, f ≤ 1.0 kHz",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Cathode to Anode Voltage (recommended)",
          "symbol": "VKA",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 2.495,
          "typ": null,
          "max": 36,
          "conditions": "Min printed as Vref",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Cathode Current (recommended)",
          "symbol": "IK",
          "kind": "recommended_operating",
          "unit": "mA",
          "min": 1,
          "typ": null,
          "max": 100,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Cathode to Anode Voltage (abs max)",
          "symbol": "VKA",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 37,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Cathode Current Range, Continuous",
          "symbol": "IK",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": -100,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Reference Input Current Range, Continuous",
          "symbol": "Iref",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": -0.05,
          "typ": null,
          "max": 10,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Operating Junction Temperature",
          "symbol": "TJ",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Operating Ambient Temperature Range",
          "symbol": "TA",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": 0,
          "typ": null,
          "max": 70,
          "conditions": "TL431C",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Storage Temperature Range",
          "symbol": "Tstg",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Total Power Dissipation",
          "symbol": "PD",
          "kind": "absolute_maximum",
          "unit": "W",
          "min": null,
          "typ": null,
          "max": 0.7,
          "conditions": "TA = 25°C, D suffix plastic package",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Total Power Dissipation",
          "symbol": "PD",
          "kind": "absolute_maximum",
          "unit": "W",
          "min": null,
          "typ": null,
          "max": 1.5,
          "conditions": "TC = 25°C, D suffix plastic package",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "ESD Human Body Model",
          "symbol": "HBM",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": 2000,
          "typ": null,
          "max": null,
          "conditions": ">2000, JESD22-A114F",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "ESD Machine Model",
          "symbol": "MM",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": 200,
          "typ": null,
          "max": null,
          "conditions": ">200, JESD22-A115C",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "ESD Charged Device Model",
          "symbol": "CDM",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": 500,
          "typ": null,
          "max": null,
          "conditions": ">500, JESD22-C101E",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Thermal Resistance, Junction-to-Ambient",
          "symbol": "RθJA",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 178,
          "max": null,
          "conditions": "D, LP suffix package",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Thermal Resistance, Junction-to-Case",
          "symbol": "RθJC",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 83,
          "max": null,
          "conditions": "D, LP suffix package",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Equivalent Full-Range Temperature Coefficient",
          "symbol": "",
          "kind": "temperature_coefficient",
          "unit": "ppm/°C",
          "min": null,
          "typ": 50,
          "max": null,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
        }
      ]
    }
  },
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  "discovery_triggers": [
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  ],
  "discovery_pitch": "TL431CDR2G (onsemi) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
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}