CBM1307AS8

{
  "slug": "cbm1307as8",
  "version": "0.1.0",
  "type": "component",
  "description": "Corebai Microelectronics Real Time Clocks, SOIC-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "clock-timing",
    "cbm1307as8",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "cbm1307as8.kicad_sym",
    "cbm1307as8.kicad_mod",
    "cbm1307as8.glb",
    "cbm1307as8.step",
    "cbm1307as8.lbr",
    "docs/hero.png",
    "docs/cbm1307as8-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "cbm1307as8-hero.glb",
    "cbm1307as8-hero.overlay.json",
    "cbm1307as8-etched.glb"
  ],
  "component": {
    "mpn": "CBM1307AS8",
    "manufacturer": "Corebai Microelectronics",
    "package": "SOIC-8",
    "pin_count": 8,
    "category": "Clock/Timing",
    "subcategory": "Real Time Clocks",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588884810885943296",
    "parts": {
      "symbol": "cbm1307as8.kicad_sym",
      "footprint": "cbm1307as8.kicad_mod",
      "model_3d": "cbm1307as8-hero.glb",
      "model_3d_plain": "cbm1307as8-etched.glb",
      "model_3d_step": "cbm1307as8-etched.step",
      "model_3d_step_plain": "cbm1307as8.step",
      "lbr": "cbm1307as8.lbr"
    },
    "distributor_links": {
      "lcsc": "C476310"
    },
    "distributor_check": {
      "checked_at": "2026-10-19T04:32:49Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "X1",
        "type": "input",
        "description": "Pin for connection of the quartz resonator (32.768 kHz crystal oscillator input); the datasheet gives no frequency or load limits for it."
      },
      {
        "number": "2",
        "name": "X2",
        "type": "input",
        "description": "Pin for connection of the quartz resonator, the second terminal of the crystal oscillator; the datasheet gives no frequency or load limits for it."
      },
      {
        "number": "3",
        "name": "VBAT",
        "type": "power_in",
        "description": "Battery supply pin for backup mode, recommended operating range 2.0 V to 3.5 V with an absolute maximum of 7.0 V."
      },
      {
        "number": "4",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin for the device."
      },
      {
        "number": "5",
        "name": "SDA",
        "type": "bidirectional",
        "description": "Input/output of serial data for the two-wire bus; input thresholds are VIL max 0.8 V and VIH min 2.2 V, with an absolute maximum of 7.0 V."
      },
      {
        "number": "6",
        "name": "SCL",
        "type": "input",
        "description": "Input of the consecutive cycle (serial clock) signal for the two-wire bus; input thresholds are VIL max 0.8 V and VIH min 2.2 V, with an absolute maximum of 7.0 V."
      },
      {
        "number": "7",
        "name": "SQW/OUT",
        "type": "output",
        "description": "Output of the programmable rectangular (square-wave) signal; the datasheet gives no voltage or current limits for this pin."
      },
      {
        "number": "8",
        "name": "VCC",
        "type": "power_in",
        "description": "Main power supply pin, recommended operating range 4.5 V to 5.5 V with an absolute maximum of 7.0 V."
      }
    ],
    "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: Package is printed as SOP-8 in the ordering table (page 25) and SOP8 in the dimension drawing (page ; X1 and X2 are listed as type 'In' in the datasheet. I mapped both to KiCad 'input' to match the sour; The datasheet's electrical limits for SDA, SCL, VCC and VBAT are in the recommended-conditions and a"
        ],
        "pages_sent": 7,
        "cost_usd": 0.027,
        "at": "2026-10-19T04:30:40"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588884810885943296",
        "pages": 38,
        "sha256": "81bc4fed5657900a",
        "source_tier": "lcsc"
      },
      "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": [
      {
        "file": "cbm1307as8.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": "2026-10-19",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "cbm1307as8-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": "9610d9e4af9ae4994539b2f5cc5b6a22652b16d946e1170188a726d77fdb32fa",
        "checked": "2026-10-19",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}