LM4040AIZ-4.1

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  "slug": "lm4040aiz-4-1",
  "title": "LM4040AIZ-4.1",
  "brief": "Texas Instruments Voltage Reference, TO-92-3. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
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  "component": {
    "mpn": "LM4040AIZ-4.1",
    "manufacturer": "Texas Instruments",
    "package": "TO-92-3",
    "pin_count": 3,
    "category": "Power Management (PMIC)",
    "subcategory": "Voltage Reference",
    "datasheet": "https://www.ti.com/cn/lit/gpn/lm4040-n",
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      "model_3d_plain": "lm4040aiz-4-1.glb",
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      "model_3d_step_plain": "lm4040aiz-4-1.step",
      "lbr": "lm4040aiz-4-1.lbr"
    },
    "distributor_links": {
      "lcsc": "C1575334",
      "digikey": "2156-LM4040AIZ-4.1-ND",
      "mouser": "926-LM4040AIZ-41"
    },
    "distributor_check": {
      "checked_at": "2026-10-08T14:43:28Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "2156-LM4040AIZ-4.1-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "926-LM4040AIZ-41",
        "status": "found",
        "lifecycle": "Obsolete"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "*",
        "type": "passive",
        "description": "Pin marked * must be left floating or connected to the anode (footnote 1); TI recommends connecting it to the anode in applications with high EMI or significant high-frequency switching noise."
      },
      {
        "number": "2",
        "name": "Cathode",
        "type": "passive",
        "description": "Cathode is the shunt current/output voltage pin; the regulated reverse breakdown voltage is developed across cathode and anode, with an external series resistor setting the current."
      },
      {
        "number": "3",
        "name": "Anode",
        "type": "passive",
        "description": "Anode is normally connected to ground; the datasheet specifies a reverse current range of 68 µA minimum to 15 mA maximum for the LM4040-N-4.1."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
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        "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: Pin 1 footnote is ambiguous for TO-92: the table marks TO-92 pin 1 with footnote (1), which says the; Pin types were chosen as passive for cathode and anode because the datasheet labels them I/O and O r; Specs (headline electrical parameters) are not part of this output schema. Items noted from the text"
        ],
        "pages_sent": 28,
        "cost_usd": 0.1841,
        "at": "2026-10-08T14:43:09"
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      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/lm4040-n",
        "pages": 84,
        "sha256": "5655b017c6397138",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 3,
        "described": 3,
        "cites_pages": true,
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        "origin": "footprint origin = pad-pattern centre",
        "seat": "body on z = 0, through-hole leads below",
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        "zmin_mm": -2.5,
        "centre_offset_mm": 0.542,
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        "sha256": "f0b61c32ecbf0067157adc5a3d4966ceadf5d6dafe93c51af35f76c41c71a54a",
        "checked": "2026-10-08",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
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        "file": "lm4040aiz-4-1-etched.step",
        "role": "eda",
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        "sha256": "33da2260d0cccc24d0e79a51215a33bbfbba8b7ecbcfa29875b109c09db3c885",
        "checked": "2026-10-08",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "TO-92-3",
      "Category": "Power Management (PMIC)",
      "Pins": "3"
    }
  },
  "variants": [],
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  "discovery_triggers": [
    "lm4040aiz-4.1"
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  "discovery_pitch": "LM4040AIZ-4.1 (Texas Instruments) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
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  "visibility": {
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}