BU9873FJ-GTE2

{
  "slug": "bu9873fj-gte2",
  "version": "0.1.0",
  "type": "component",
  "description": "ROHM Semicon Real-time Clocks (RTC), SOIC-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "clock and timing",
    "bu9873fj-gte2",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "bu9873fj-gte2.kicad_sym",
    "bu9873fj-gte2.kicad_mod",
    "bu9873fj-gte2.glb",
    "bu9873fj-gte2.step",
    "bu9873fj-gte2.lbr",
    "docs/hero.png",
    "docs/bu9873fj-gte2-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "bu9873fj-gte2-hero.glb",
    "bu9873fj-gte2-hero.overlay.json",
    "bu9873fj-gte2-etched.glb"
  ],
  "component": {
    "mpn": "BU9873FJ-GTE2",
    "manufacturer": "ROHM Semicon",
    "package": "SOIC-8",
    "pin_count": 8,
    "category": "Clock and Timing",
    "subcategory": "Real-time Clocks (RTC)",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/3b8968eebf7659c4a101b90f2d55beb0.pdf",
    "parts": {
      "symbol": "bu9873fj-gte2.kicad_sym",
      "footprint": "bu9873fj-gte2.kicad_mod",
      "model_3d": "bu9873fj-gte2-hero.glb",
      "model_3d_plain": "bu9873fj-gte2-etched.glb",
      "model_3d_step": "bu9873fj-gte2-etched.step",
      "model_3d_step_plain": "bu9873fj-gte2.step",
      "lbr": "bu9873fj-gte2.lbr"
    },
    "distributor_links": {
      "lcsc": "C2672591",
      "digikey": "BU9873FJ-GTE2TR-ND",
      "mouser": "755-BU9873FJ-GTE2"
    },
    "distributor_check": {
      "checked_at": "2026-10-27T06:49:38Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "BU9873FJ-GTE2TR-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "755-BU9873FJ-GTE2",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "32KOUT",
        "type": "output",
        "description": "The 32KOUT pin outputs a 32.768 kHz clock pulse under internal register control, is enabled from power-on at 0V, and is a CMOS push-pull output."
      },
      {
        "number": "2",
        "name": "SCL",
        "type": "input",
        "description": "The SCL pin inputs the clock pulses that synchronize data transfer on the SDA pin."
      },
      {
        "number": "3",
        "name": "SDA",
        "type": "bidirectional",
        "description": "The SDA pin inputs and outputs data for writing and reading, synchronized with SCL, and is an N-channel open-drain output."
      },
      {
        "number": "4",
        "name": "VSS",
        "type": "power_in",
        "description": "The VSS pin is the ground connection."
      },
      {
        "number": "5",
        "name": "INTRB",
        "type": "output",
        "description": "The INTRB pin outputs periodic or alarm interrupts (Alarm_A, Alarm_B) to the CPU, is disabled during power-on from 0V, and is an N-channel open-drain output."
      },
      {
        "number": "6",
        "name": "OSCOUT",
        "type": "passive",
        "description": "The OSCOUT pin connects to the 32.768 kHz crystal oscillator, as all other oscillation circuit components are integrated in the IC."
      },
      {
        "number": "7",
        "name": "OSCIN",
        "type": "passive",
        "description": "The OSCIN pin connects to the 32.768 kHz crystal oscillator, as all other oscillation circuit components are integrated in the IC."
      },
      {
        "number": "8",
        "name": "VDD",
        "type": "power_in",
        "description": "The VDD pin is the power supply connection, with a supply voltage of 1.8 to 5.5 V under operating conditions."
      }
    ],
    "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 MPN suffix FJ maps to SOP-J8 in the ordering table on page 3, so the package hint SOIC-8 was ove; Pin types for OSCIN and OSCOUT are assigned as passive because the datasheet describes them as cryst"
        ],
        "pages_sent": 9,
        "cost_usd": 0.0101,
        "at": "2026-10-27T06:49:19"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/3b8968eebf7659c4a101b90f2d55beb0.pdf",
        "pages": 40,
        "sha256": "3f85caedc14fe3fa",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 8,
        "described": 8,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
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        "file": "bu9873fj-gte2.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          4.9,
          1.75
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "07f46cff378d30e6c27dfd5a03092c795323f86d91c71fc7e743f4f418dc553a",
        "checked": "2026-10-27",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "bu9873fj-gte2-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          4.9,
          1.75
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "6c5a85d0465bcb632a623fa3ea934cd0345c3b1c468ced6bb7d3a3aa57f67733",
        "checked": "2026-10-27",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}