LM4040A25IDCKR

{
  "schema_version": 1,
  "type": "component",
  "slug": "lm4040a25idckr",
  "title": "LM4040A25IDCKR",
  "brief": "Texas Instruments Voltage Reference, SC-70-5. 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 (pmic)",
    "lm4040a25idckr",
    "factory-2.0.0",
    "extractor-text"
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  "component": {
    "mpn": "LM4040A25IDCKR",
    "manufacturer": "Texas Instruments",
    "package": "SC-70-5",
    "pin_count": 5,
    "category": "Power Management (PMIC)",
    "subcategory": "Voltage Reference",
    "datasheet": "https://www.ti.com/cn/lit/gpn/lm4040",
    "parts": {
      "symbol": "lm4040a25idckr.kicad_sym",
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      "lbr": "lm4040a25idckr.lbr"
    },
    "distributor_links": {
      "lcsc": "C2156886",
      "digikey": "296-20860-2-ND",
      "mouser": "595-LM4040A25IDCKR"
    },
    "distributor_check": {
      "checked_at": "2026-10-11T19:03:24Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "296-20860-2-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "595-LM4040A25IDCKR",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "ANODE",
        "type": "passive",
        "description": "General-purpose pin, typically grounded, and the reference terminal of the shunt regulator (the cathode-to-anode voltage is the regulated VZ)."
      },
      {
        "number": "2",
        "name": "*",
        "type": "passive",
        "description": "Must be left floating or connected to the anode; TI recommends connecting it to the anode in applications with high EMI or significant high-frequency switching noise."
      },
      {
        "number": "3",
        "name": "CATHODE",
        "type": "passive",
        "description": "Parallel current/voltage input; the cathode current IZ must be kept within the recommended range of 15 mA maximum, and the absolute maximum continuous cathode current is -10 mA to 25 mA."
      },
      {
        "number": "4",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection."
      },
      {
        "number": "5",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection."
      }
    ],
    "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 labels these pins as ANODE (O), * (I) and CATHODE (I/O). I mapped them to KiCad 'passi; Pin 2 (*) is marked as an input in Table 5-1 and is described as 'must float or connect to anode', s; Pin assignment is taken from Table 5-1 (DCK column), since the SC70 top-view figure labels in the ex"
        ],
        "pages_sent": 26,
        "cost_usd": 0.1755,
        "at": "2026-10-11T19:03:09"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/lm4040",
        "pages": 62,
        "sha256": "68faec55d71e5cd5",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 5,
        "described": 5,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "lm4040a25idckr.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.1,
          2,
          1.1
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "2860de5b7b085919ff6e952148353f928798588d9f544dc69430545aff2ba908",
        "checked": "2026-10-11",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "lm4040a25idckr-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
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          2,
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "546fe6d6401d09c4ba69367057bc50f91d7da680dcc8b2ed56dbd10f2f7d79bd",
        "checked": "2026-10-11",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "SC-70-5",
      "Category": "Power Management (PMIC)",
      "Pins": "5"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "68faec55d71e5cd5",
      "rows": [
        {
          "name": "Reverse breakdown voltage tolerance (ΔVZ), 25°C",
          "symbol": "ΔVZ",
          "kind": "tolerance",
          "unit": "mV",
          "min": -2.5,
          "typ": null,
          "max": 2.5,
          "conditions": "IZ = 100μA, TA = 25°C",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Reverse breakdown voltage tolerance (ΔVZ), full range",
          "symbol": "ΔVZ",
          "kind": "tolerance",
          "unit": "mV",
          "min": -19,
          "typ": null,
          "max": 19,
          "conditions": "IZ = 100μA, TA = full range (-40°C to 85°C)",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Minimum cathode current",
          "symbol": "IZ,min",
          "kind": "electrical",
          "unit": "μA",
          "min": 45,
          "typ": 75,
          "max": null,
          "conditions": "TA = 25°C",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Minimum cathode current, full range",
          "symbol": "IZ,min",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": null,
          "max": 80,
          "conditions": "TA = full range (-40°C to 85°C)",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Average temperature coefficient of VZ, IZ = 10mA",
          "symbol": "αVZ",
          "kind": "temperature_coefficient",
          "unit": "ppm/°C",
          "min": -20,
          "typ": null,
          "max": 20,
          "conditions": "IZ = 10mA, TA = 25°C",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Average temperature coefficient of VZ, IZ = 1mA",
          "symbol": "αVZ",
          "kind": "temperature_coefficient",
          "unit": "ppm/°C",
          "min": -15,
          "typ": null,
          "max": 15,
          "conditions": "IZ = 1mA, TA = 25°C",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Average temperature coefficient of VZ, full range",
          "symbol": "αVZ",
          "kind": "temperature_coefficient",
          "unit": "ppm/°C",
          "min": -100,
          "typ": null,
          "max": 100,
          "conditions": "TA = full range (-40°C to 85°C)",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Average temperature coefficient of VZ, IZ = 100μA",
          "symbol": "αVZ",
          "kind": "temperature_coefficient",
          "unit": "ppm/°C",
          "min": -15,
          "typ": null,
          "max": 15,
          "conditions": "IZ = 100μA, TA = 25°C",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Change in VZ with cathode current, IZ,min < IZ < 1mA, 25°C",
          "symbol": "ΔVZ/ΔIZ",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 0.3,
          "max": 0.8,
          "conditions": "IZ,min < IZ < 1mA, TA = 25°C",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Change in VZ with cathode current, IZ,min < IZ < 1mA, full range",
          "symbol": "ΔVZ/ΔIZ",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": null,
          "max": 1,
          "conditions": "IZ,min < IZ < 1mA, TA = full range (-40°C to 85°C)",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Change in VZ with cathode current, 1mA < IZ < 15mA, 25°C",
          "symbol": "ΔVZ/ΔIZ",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 2.5,
          "max": 6,
          "conditions": "1mA < IZ < 15mA, TA = 25°C",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Change in VZ with cathode current, 1mA < IZ < 15mA, full range",
          "symbol": "ΔVZ/ΔIZ",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": null,
          "max": 8,
          "conditions": "1mA < IZ < 15mA, TA = full range (-40°C to 85°C)",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Reverse dynamic impedance",
          "symbol": "ZZ",
          "kind": "electrical",
          "unit": "Ω",
          "min": null,
          "typ": 0.3,
          "max": 0.8,
          "conditions": "IZ = 1mA, f = 120Hz, IAC = 0.1IZ, TA = 25°C",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Continuous cathode current",
          "symbol": "IZ",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": -10,
          "typ": null,
          "max": 25,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Operating virtual junction temperature",
          "symbol": "TJ",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Storage temperature range",
          "symbol": "Tstg",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Cathode current",
          "symbol": "IZ",
          "kind": "recommended_operating",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 15,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Free-air operating temperature, LM4040xxxI",
          "symbol": "TA",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 85,
          "conditions": "LM4040xxxI (industrial grade)",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Junction-to-ambient thermal resistance, DCK (5-pin SC70)",
          "symbol": "RθJA",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 252,
          "max": null,
          "conditions": "DCK 5-pin package",
          "source_page": 5,
          "source": "datasheet"
        }
      ]
    }
  },
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  "discovery_triggers": [
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  "discovery_pitch": "LM4040A25IDCKR (Texas Instruments) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
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