main
Ray Set visibility: public ca18994 8d ago
{
  "schema_version": 1,
  "type": "component",
  "slug": "ch444tb",
  "title": "CH444TB",
  "brief": "COSEMITECH Hall Switches, TO-92S. 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",
    "magnetic sensors",
    "ch444tb",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "CH444TB",
    "manufacturer": "COSEMITECH",
    "package": "TO-92S",
    "pin_count": 3,
    "category": "Magnetic Sensors",
    "subcategory": "Hall Switches",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588945498384576512",
    "parts": {
      "symbol": "ch444tb.kicad_sym",
      "footprint": "ch444tb.kicad_mod",
      "model_3d": "ch444tb-hero.glb",
      "model_3d_plain": "ch444tb-etched.glb",
      "model_3d_step": "ch444tb-etched.step",
      "model_3d_step_plain": "ch444tb.step",
      "lbr": "ch444tb.lbr"
    },
    "distributor_links": {
      "lcsc": "C2879978"
    },
    "distributor_check": {
      "checked_at": "2026-10-20T23:46:02Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "VDD",
        "type": "power_in",
        "description": "Supply voltage pin, specified for a 2.5 V to 22 V operating range, with an absolute maximum supply voltage of 24 V and a reverse voltage rating of -22 V."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin; the device is protected in the event that the VCC pin and the GND pin are reversed, up to -22 V."
      },
      {
        "number": "3",
        "name": "OUT",
        "type": "output",
        "description": "Open-collector output pin with an output voltage limit of -0.3 V to 24 V and an absolute maximum output current of 25 mA."
      }
    ],
    "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 pin table on page 5 lists pin numbers for all three packages in one table. The TO-92S column was; Output current is inconsistent in the datasheet. The absolute maximum ratings (page 5) give 25 mA fo; The datasheet is marked Preliminary (advanced information) and the pin table is shared across packag"
        ],
        "pages_sent": 15,
        "cost_usd": 0.0536,
        "at": "2026-10-20T23:43:26"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588945498384576512",
        "pages": 15,
        "sha256": "bb180a03995d8124",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 3,
        "described": 3,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "ch444tb.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "body on z = 0, through-hole leads below",
        "extents_mm": [
          4.83,
          3.745,
          9.8
        ],
        "zmin_mm": -2.5,
        "centre_offset_mm": 0.542,
        "footprint_binding": "identity",
        "sha256": "f0b61c32ecbf0067157adc5a3d4966ceadf5d6dafe93c51af35f76c41c71a54a",
        "checked": "2026-10-20",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "ch444tb-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "body on z = 0, through-hole leads below",
        "extents_mm": [
          4.83,
          3.745,
          9.8
        ],
        "zmin_mm": -2.5,
        "centre_offset_mm": 0.542,
        "footprint_binding": "identity",
        "sha256": "aa7f46d82dbc835daf6d5dc6d34d6cff37876c99381865bda4f39d09b6c27340",
        "checked": "2026-10-20",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "COSEMITECH",
      "Package": "TO-92S",
      "Category": "Magnetic Sensors",
      "Pins": "3"
    },
    "appearance": {
      "contacts": {
        "quote": "and SOT-89. Each package type is lead (Pb) free (suffix, –T), with a 100% matte-tin-plated lead-frame. Cosemitech CHA44X/CH44X",
        "page": 1,
        "doc": "ds.pdf",
        "plating": "tin"
      },
      "version": 1,
      "datasheet_sha256": "bb180a03995d81240ebe11af3a2d10d46d3f78a888793bbce2223ce5a64caf21"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "bb180a03995d81240ebe11af3a2d10d46d3f78a888793bbce2223ce5a64caf21",
      "rows": [
        {
          "name": "Supply voltage",
          "symbol": "VCC",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 2.5,
          "typ": null,
          "max": 22,
          "conditions": "-40 °C to 150 °C",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Supply Current",
          "symbol": "IDD",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 1.6,
          "max": 3,
          "conditions": "VDD = 2.5V to 22V",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Output saturation voltage",
          "symbol": "VDSon",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.4,
          "conditions": "at 20mA, Gauss >BOP",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Output Leakage Current",
          "symbol": "IOFF",
          "kind": "electrical",
          "unit": "uA",
          "min": null,
          "typ": null,
          "max": 10,
          "conditions": "VOUT = 24 V; Switch state = Off",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Output Current Limit",
          "symbol": "IOUT(lim)",
          "kind": "electrical",
          "unit": "mA",
          "min": 30,
          "typ": null,
          "max": 90,
          "conditions": "Short-Circuit Protection",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Output rise time",
          "symbol": "TR",
          "kind": "timing",
          "unit": "uS",
          "min": null,
          "typ": 0.2,
          "max": 2,
          "conditions": "RLOAD = 820 Ω, CLOAD = 10 pF",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Output fall time",
          "symbol": "TF",
          "kind": "timing",
          "unit": "uS",
          "min": null,
          "typ": 0.1,
          "max": 2,
          "conditions": "RLOAD = 820Ω, CLOAD = 10 pF",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Power-On Time",
          "symbol": "tPO",
          "kind": "timing",
          "unit": "μs",
          "min": null,
          "typ": null,
          "max": 30,
          "conditions": "TA = 25°C; CLOAD = 10 pF",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Operating temperature",
          "symbol": "T",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Storage temperature",
          "symbol": "TS",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Magnetic operating point",
          "symbol": "BOP",
          "kind": "electrical",
          "unit": "Gauss",
          "min": 70,
          "typ": 120,
          "max": 180,
          "conditions": "TA=-40oC to 150oC",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "Magnetic release point",
          "symbol": "BRP",
          "kind": "electrical",
          "unit": "Gauss",
          "min": -180,
          "typ": -120,
          "max": -70,
          "conditions": "TA=-40oC to 150oC",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "Magnetic hysteresis window |BOP-BRP|",
          "symbol": "BHYST",
          "kind": "electrical",
          "unit": "Gauss",
          "min": 180,
          "typ": 240,
          "max": 300,
          "conditions": "TA=-40oC to 150oC",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "Magnetic offset; BO = (BOP + BRP) / 2",
          "symbol": "Bo",
          "kind": "electrical",
          "unit": "Gauss",
          "min": -30,
          "typ": 0,
          "max": 30,
          "conditions": "TA=-40oC to 150oC",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "Supply Voltage",
          "symbol": "VDD",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 24,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "VDD Reverse Voltage",
          "symbol": "VRDD",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -22,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Supply Current",
          "symbol": "IDD",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 20,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Output Voltage",
          "symbol": "VOUT",
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          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 24,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Output Current",
          "symbol": "IOUT",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 25,
          "conditions": "",
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          "source": "datasheet"
        },
        {
          "name": "Operating Ambient Temperature",
          "symbol": "TA",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Storage Temperature",
          "symbol": "TS",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -55,
          "typ": null,
          "max": 165,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Junction temperature",
          "symbol": "TJ",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -55,
          "typ": null,
          "max": 165,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Thermal resistance",
          "symbol": "RTH",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 203,
          "max": null,
          "conditions": "TO-92S",
          "source_page": 7,
          "source": "datasheet"
        }
      ]
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "ch444tb"
  ],
  "discovery_pitch": "CH444TB (COSEMITECH) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
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    "path": "docs/hero.png"
  },
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    "README.md",
    "ch444tb.kicad_sym",
    "ch444tb.kicad_mod",
    "ch444tb.glb",
    "ch444tb.step",
    "ch444tb.lbr",
    "docs/hero.png",
    "docs/ch444tb-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "ch444tb-hero.glb",
    "ch444tb-hero.overlay.json",
    "ch444tb-etched.glb"
  ],
  "visibility": {
    "public": true
  }
}