DS1307M

{
  "schema_version": 1,
  "type": "component",
  "slug": "ds1307m",
  "title": "DS1307M",
  "brief": "HGSEMI Real Time Clocks, SOP-8. 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",
    "clock-timing",
    "ds1307m",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "DS1307M",
    "manufacturer": "HGSEMI",
    "package": "SOP-8",
    "pin_count": 8,
    "category": "Clock/Timing",
    "subcategory": "Real Time Clocks",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8756372549431508992",
    "parts": {
      "symbol": "ds1307m.kicad_sym",
      "footprint": "ds1307m.kicad_mod",
      "model_3d": "ds1307m-etched.glb",
      "model_3d_plain": "ds1307m.glb",
      "model_3d_step": "ds1307m-etched.step",
      "model_3d_step_plain": "ds1307m.step",
      "lbr": "ds1307m.lbr"
    },
    "distributor_links": {
      "lcsc": "C356706"
    },
    "pins": [
      {
        "number": "1",
        "name": "X1",
        "type": "passive",
        "description": "32.768 kHz crystal connection pin with 12.5 pF specified load capacitance, or external oscillator input"
      },
      {
        "number": "2",
        "name": "X2",
        "type": "passive",
        "description": "32.768 kHz crystal connection pin; leave floating when external oscillator is connected to X1"
      },
      {
        "number": "3",
        "name": "VBAT",
        "type": "power_in",
        "description": "Battery backup power supply input; operating voltage 2.0 V to 3.5 V"
      },
      {
        "number": "4",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference potential"
      },
      {
        "number": "5",
        "name": "SDA",
        "type": "bidirectional",
        "description": "I2C serial data input/output; open-drain pin requires external pull-up resistor"
      },
      {
        "number": "6",
        "name": "SCL",
        "type": "bidirectional",
        "description": "I2C serial clock input; open-drain pin requires external pull-up resistor and supports 0 to 100 kHz frequency"
      },
      {
        "number": "7",
        "name": "SQW/OUT",
        "type": "tri_state",
        "description": "Programmable square wave output or fixed logic level; selectable frequencies 1 Hz/4.096 kHz/8.192 kHz/32.768 kHz; open-drain requires external pull-up resistor"
      },
      {
        "number": "8",
        "name": "VCC",
        "type": "power_in",
        "description": "Power supply input; operating voltage range 4.5 V to 5.5 V with typical 5.0 V"
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.2",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.2",
        "primary_model": "claude-haiku-4-5-20251001",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-4-6",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [],
        "pages_sent": 14,
        "cost_usd": 0.2126,
        "at": "2026-09-17T22:53:56"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8756372549431508992",
        "pages": 14,
        "sha256": "99d95856b4d3f840",
        "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": "ds1307m.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          4.9,
          1.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "07f46cff378d30e6c27dfd5a03092c795323f86d91c71fc7e743f4f418dc553a",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "ds1307m-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          4.9,
          1.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "03243c5efbe8d4424ed5b167e940a36e66064c9e30d25562447449591c0a5bb5",
        "checked": "2026-11-03",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "HGSEMI",
      "Package": "SOP-8",
      "Category": "Clock/Timing",
      "Pins": "8"
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "ds1307m"
  ],
  "discovery_pitch": "DS1307M (HGSEMI) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "ds1307m.kicad_sym",
    "ds1307m.kicad_mod",
    "ds1307m.glb",
    "ds1307m.step",
    "ds1307m.lbr",
    "docs/hero.png",
    "docs/ds1307m-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "visibility": {
    "public": true
  },
  "updated_at": "2026-09-24T20:05:05.519Z"
}