SHT40-BD1B-R2

{
  "slug": "sht40-bd1b-r2",
  "version": "0.1.0",
  "type": "component",
  "description": "Sensirion Temperature And Humidity Sensor, DFN-4(1.5x1.5). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "sensors",
    "sht40-bd1b-r2",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "sht40-bd1b-r2.kicad_sym",
    "sht40-bd1b-r2.kicad_mod",
    "sht40-bd1b-r2.glb",
    "sht40-bd1b-r2.step",
    "sht40-bd1b-r2.lbr",
    "docs/hero.png",
    "docs/sht40-bd1b-r2-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "sht40-bd1b-r2-hero.glb",
    "sht40-bd1b-r2-hero.overlay.json",
    "sht40-bd1b-r2-etched.glb"
  ],
  "component": {
    "mpn": "SHT40-BD1B-R2",
    "manufacturer": "Sensirion",
    "package": "DFN-4(1.5x1.5)",
    "pin_count": 4,
    "category": "Sensors",
    "subcategory": "Temperature And Humidity Sensor",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590907341242122240",
    "parts": {
      "symbol": "sht40-bd1b-r2.kicad_sym",
      "footprint": "sht40-bd1b-r2.kicad_mod",
      "model_3d": "sht40-bd1b-r2-hero.glb",
      "model_3d_plain": "sht40-bd1b-r2-etched.glb",
      "model_3d_step": "sht40-bd1b-r2-etched.step",
      "model_3d_step_plain": "sht40-bd1b-r2.step",
      "lbr": "sht40-bd1b-r2.lbr"
    },
    "distributor_links": {
      "lcsc": "C7461849",
      "digikey": "1649-SHT40-BD1B-R2TR-ND",
      "mouser": "403-SHT40-BD1B-R2"
    },
    "distributor_check": {
      "checked_at": "2026-10-20T21:09:26Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "1649-SHT40-BD1B-R2TR-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "403-SHT40-BD1B-R2",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "SDA",
        "type": "bidirectional",
        "description": "Serial data line for I2C communication, bidirectional."
      },
      {
        "number": "2",
        "name": "SCL",
        "type": "input",
        "description": "Serial clock line for I2C communication, unidirectional input."
      },
      {
        "number": "3",
        "name": "VDD",
        "type": "power_in",
        "description": "Supply voltage pin; the datasheet specifies VDD = 1.08 V … 3.6 V."
      },
      {
        "number": "4",
        "name": "VSS",
        "type": "power_in",
        "description": "Ground pin."
      }
    ],
    "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 requested 1.5x1.5 mm DFN-4 size is not stated numerically in the supplied pages; the dimensional; The datasheet says the central die pad is not directly connected to any pin and gives it no pin numb; The VDD range 1.08 V … 3.6 V is taken from the Highlights on page 1, not from the pin table on page "
        ],
        "pages_sent": 10,
        "cost_usd": 0.0437,
        "at": "2026-10-20T21:04:18"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590907341242122240",
        "pages": 23,
        "sha256": "dee272ffc0a3ec57",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 4,
        "described": 4,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "sht40-bd1b-r2.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          1.52,
          1.5,
          0.55
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "4d6f8a2230add77a329ad99a3a8d96d91725e93b5ebcbc33479746d9af886e6f",
        "checked": "2026-10-20",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "sht40-bd1b-r2-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          1.52,
          1.5,
          0.55
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "5182bbc288c322ebd690776c114c828ea61fc348aec17d11528e94409740d35c",
        "checked": "2026-10-20",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}