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Ray Set visibility: public cba9cea 20h ago
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{
  "schema_version": 1,
  "type": "component",
  "slug": "sht40-bd1b-r2",
  "title": "SHT40-BD1B-R2",
  "brief": "Sensirion Temperature And Humidity Sensor, DFN-4(1.5x1.5). 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",
    "sensors",
    "sht40-bd1b-r2",
    "factory-2.0.0",
    "extractor-text"
  ],
  "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": [
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          1.5,
          0.55
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 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": [
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "5182bbc288c322ebd690776c114c828ea61fc348aec17d11528e94409740d35c",
        "checked": "2026-10-20",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Sensirion",
      "Package": "DFN-4(1.5x1.5)",
      "Category": "Sensors",
      "Pins": "4"
    },
    "appearance": {
      "contacts": {
        "quote": "SHT4x is provided in an open-cavity dual flat no lead (DFN) package. The humidity sensor opening is centered on the top side of the package. The sensor chip is made of silicon, hosted on a copper lead",
        "page": 14,
        "doc": "ds.pdf",
        "material": "copper"
      },
      "version": 1,
      "datasheet_sha256": "dee272ffc0a3ec572dc5443217e26da13697814f3bace6b4e6be969943159163"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "dee272ffc0a3ec572dc5443217e26da13697814f3bace6b4e6be969943159163",
      "rows": [
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          "name": "Supply voltage",
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          "unit": "V",
          "min": 1.08,
          "typ": 3.3,
          "max": 3.6,
          "conditions": "",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Power-up/down voltage",
          "symbol": "VPOR",
          "kind": "electrical",
          "unit": "V",
          "min": 0.6,
          "typ": null,
          "max": 1.08,
          "conditions": "Static power supply",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Slew rate of the supply voltage",
          "symbol": "VDD, slew",
          "kind": "electrical",
          "unit": "V/ms",
          "min": null,
          "typ": null,
          "max": 20,
          "conditions": "Voltage changes on the supply between VDD, min and VDD, max. Faster slew rates may lead to a reset",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Supply current (heater off), idle state",
          "symbol": "IDD",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 0.08,
          "max": 1,
          "conditions": "Idle state, At 25 °C",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Supply current (heater off), idle state",
          "symbol": "IDD",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": null,
          "max": 3.4,
          "conditions": "Idle state, At 125 °C",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Supply current (heater off), measurement",
          "symbol": "IDD",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 320,
          "max": 500,
          "conditions": "Current while sensor is measuring",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Supply current (heater on), nominal heater 200 mW",
          "symbol": "IDD",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 60,
          "max": 100,
          "conditions": "Nomin. heater 200 mW",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Supply current (heater on), nominal heater 110 mW",
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          "typ": 33,
          "max": 55,
          "conditions": "Nomin. heater 110 mW",
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          "source": "datasheet"
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        {
          "name": "Supply current (heater on), nominal heater 20 mW",
          "symbol": "IDD",
          "kind": "electrical",
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          "min": null,
          "typ": 6,
          "max": 10,
          "conditions": "Nomin. heater 20 mW",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Low level input voltage",
          "symbol": "VIL",
          "kind": "electrical",
          "unit": "V",
          "min": 0,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Pull up resistor",
          "symbol": "Rp",
          "kind": "electrical",
          "unit": "Ω",
          "min": 820,
          "typ": null,
          "max": null,
          "conditions": "VDD < 1.62 V",
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          "source": "datasheet"
        },
        {
          "name": "Pull up resistor",
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          "min": 390,
          "typ": null,
          "max": null,
          "conditions": "VDD ≥ 1.62 V",
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        },
        {
          "name": "Low level output voltage",
          "symbol": "VOL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.4,
          "conditions": "VDD > 2.0 V, Rpullup > 390 Ω",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Capacitive bus load, fast mode",
          "symbol": "Cb",
          "kind": "electrical",
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          "typ": null,
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          "conditions": "RP ≤ 820 Ω: fast mode",
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          "source": "datasheet"
        },
        {
          "name": "Capacitive bus load, fast mode plus",
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          "typ": null,
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          "conditions": "Rp = 390 Ω, VDD > 1.62 V: fast mode plus",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Power-up time",
          "symbol": "tPU",
          "kind": "timing",
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          "conditions": "After hard reset, VDD ≥ VPOR",
          "source_page": 10,
          "source": "datasheet"
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        {
          "name": "Soft reset time",
          "symbol": "tSR",
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        {
          "name": "Measurement duration, low repeatability",
          "symbol": "tMEAS,l",
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          "max": 1.6,
          "conditions": "Low repeatability",
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          "name": "Measurement duration, medium repeatability",
          "symbol": "tMEAS,m",
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          "max": 4.5,
          "conditions": "Med. repeatability",
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          "source": "datasheet"
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        {
          "name": "Measurement duration, high repeatability",
          "symbol": "tMEAS,h",
          "kind": "timing",
          "unit": "ms",
          "min": null,
          "typ": 6.9,
          "max": 8.3,
          "conditions": "High repeatability",
          "source_page": 10,
          "source": "datasheet"
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        {
          "name": "Heater-on duration, long pulse",
          "symbol": "tHeater",
          "kind": "timing",
          "unit": "s",
          "min": 0.9,
          "typ": 1,
          "max": 1.1,
          "conditions": "Long pulse",
          "source_page": 10,
          "source": "datasheet"
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        {
          "name": "Heater-on duration, short pulse",
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          "max": 0.11,
          "conditions": "Short pulse",
          "source_page": 10,
          "source": "datasheet"
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        {
          "name": "Max voltage on any pin",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": null,
          "conditions": "",
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          "source": "datasheet"
        },
        {
          "name": "Operating temperature range",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 125,
          "conditions": "",
          "source_page": 10,
          "source": "datasheet"
        },
        {
          "name": "Storage temperature range",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 150,
          "conditions": "",
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        },
        {
          "name": "ESD HBM",
          "symbol": "",
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          "unit": "kV",
          "min": null,
          "typ": null,
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          "conditions": "",
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        {
          "name": "ESD CDM",
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          "unit": "V",
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          "max": 500,
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        },
        {
          "name": "Latch up",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 100,
          "conditions": "JESD78 Class II, 125 °C",
          "source_page": 10,
          "source": "datasheet"
        },
        {
          "name": "Normal operating temperature range",
          "symbol": "",
          "kind": "recommended_operating",
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          "min": 5,
          "typ": null,
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          "conditions": "Recommended normal temperature range",
          "source_page": 7,
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        },
        {
          "name": "Normal operating relative humidity range",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "%RH",
          "min": 20,
          "typ": null,
          "max": 80,
          "conditions": "Recommended normal humidity range",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Specified temperature range",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 125,
          "conditions": "Specified range",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Specified relative humidity range",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "%RH",
          "min": 0,
          "typ": null,
          "max": 100,
          "conditions": "Specified range, extended",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Junction-to-ambient thermal resistance",
          "symbol": "RθJA",
          "kind": "thermal",
          "unit": "K/W",
          "min": null,
          "typ": 246,
          "max": null,
          "conditions": "Heater off, die pad soldered",
          "source_page": 16,
          "source": "datasheet"
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        {
          "name": "Junction-to-ambient thermal resistance",
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          "kind": "thermal",
          "unit": "K/W",
          "min": null,
          "typ": 308,
          "max": null,
          "conditions": "Heater on, die pad soldered",
          "source_page": 16,
          "source": "datasheet"
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        {
          "name": "Junction-to-ambient thermal resistance",
          "symbol": "RθJA",
          "kind": "thermal",
          "unit": "K/W",
          "min": null,
          "typ": 297,
          "max": null,
          "conditions": "Heater off, die pad not soldered",
          "source_page": 16,
          "source": "datasheet"
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        {
          "name": "Junction-to-ambient thermal resistance",
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          "kind": "thermal",
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          "min": null,
          "typ": 357,
          "max": null,
          "conditions": "Heater on, die pad not soldered",
          "source_page": 16,
          "source": "datasheet"
        },
        {
          "name": "Junction-to-case thermal resistance",
          "symbol": "RθJC",
          "kind": "thermal",
          "unit": "K/W",
          "min": null,
          "typ": 189,
          "max": null,
          "conditions": "Heater off, die pad soldered",
          "source_page": 16,
          "source": "datasheet"
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        {
          "name": "Junction-to-case thermal resistance",
          "symbol": "RθJC",
          "kind": "thermal",
          "unit": "K/W",
          "min": null,
          "typ": 255,
          "max": null,
          "conditions": "Heater on, die pad soldered",
          "source_page": 16,
          "source": "datasheet"
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        {
          "name": "Junction-to-case thermal resistance",
          "symbol": "RθJC",
          "kind": "thermal",
          "unit": "K/W",
          "min": null,
          "typ": 191,
          "max": null,
          "conditions": "Heater off, die pad not soldered",
          "source_page": 16,
          "source": "datasheet"
        },
        {
          "name": "Junction-to-case thermal resistance",
          "symbol": "RθJC",
          "kind": "thermal",
          "unit": "K/W",
          "min": null,
          "typ": 257,
          "max": null,
          "conditions": "Heater on, die pad not soldered",
          "source_page": 16,
          "source": "datasheet"
        },
        {
          "name": "Junction-to-board thermal resistance",
          "symbol": "RθJB",
          "kind": "thermal",
          "unit": "K/W",
          "min": null,
          "typ": 159,
          "max": null,
          "conditions": "Heater off, die pad soldered",
          "source_page": 16,
          "source": "datasheet"
        },
        {
          "name": "Junction-to-board thermal resistance",
          "symbol": "RθJB",
          "kind": "thermal",
          "unit": "K/W",
          "min": null,
          "typ": 225,
          "max": null,
          "conditions": "Heater on, die pad soldered",
          "source_page": 16,
          "source": "datasheet"
        },
        {
          "name": "Junction-to-board thermal resistance",
          "symbol": "RθJB",
          "kind": "thermal",
          "unit": "K/W",
          "min": null,
          "typ": 193,
          "max": null,
          "conditions": "Heater off, die pad not soldered",
          "source_page": 16,
          "source": "datasheet"
        },
        {
          "name": "Junction-to-board thermal resistance",
          "symbol": "RθJB",
          "kind": "thermal",
          "unit": "K/W",
          "min": null,
          "typ": 258,
          "max": null,
          "conditions": "Heater on, die pad not soldered",
          "source_page": 16,
          "source": "datasheet"
        }
      ]
    }
  },
  "variants": [],
  "sections": [
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    "info"
  ],
  "discovery_triggers": [
    "sht40-bd1b-r2"
  ],
  "discovery_pitch": "SHT40-BD1B-R2 (Sensirion) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "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"
  ],
  "visibility": {
    "public": true
  }
}