DS1302M

{
  "slug": "ds1302m",
  "version": "0.1.0",
  "type": "component",
  "description": "HGSEMI Real Time Clocks, SOP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "clock-timing",
    "ds1302m",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "ds1302m.kicad_sym",
    "ds1302m.kicad_mod",
    "ds1302m.glb",
    "ds1302m.step",
    "ds1302m.lbr",
    "docs/hero.png",
    "docs/ds1302m-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "ds1302m-hero.glb",
    "ds1302m-hero.overlay.json",
    "ds1302m-etched.glb"
  ],
  "component": {
    "mpn": "DS1302M",
    "manufacturer": "HGSEMI",
    "package": "SOP-8",
    "pin_count": 8,
    "category": "Clock/Timing",
    "subcategory": "Real Time Clocks",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8758163117128343552",
    "parts": {
      "symbol": "ds1302m.kicad_sym",
      "footprint": "ds1302m.kicad_mod",
      "model_3d": "ds1302m-hero.glb",
      "model_3d_plain": "ds1302m-etched.glb",
      "model_3d_step": "ds1302m-etched.step",
      "model_3d_step_plain": "ds1302m.step",
      "lbr": "ds1302m.lbr"
    },
    "distributor_links": {
      "lcsc": "C434511"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T00:16:57Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "error",
        "error": "The read operation timed out"
      },
      "mouser": {
        "pn": null,
        "status": "error",
        "error": "The read operation timed out"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "VCC2",
        "type": "power_in",
        "description": "Main supply pin, specified at 2.0 V to 5.5 V; the DS1302 is powered from whichever of VCC1 or VCC2 is higher, and from VCC2 when VCC2 exceeds VCC1 + 0.2 V."
      },
      {
        "number": "2",
        "name": "X1",
        "type": "passive",
        "description": "Connection to the 32.768 kHz crystal, which must have a specified load capacitance of 6 pF (CL)."
      },
      {
        "number": "3",
        "name": "X2",
        "type": "passive",
        "description": "Connection to the 32.768 kHz crystal, which must have a specified load capacitance of 6 pF (CL)."
      },
      {
        "number": "4",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference pin for the device."
      },
      {
        "number": "5",
        "name": "RST",
        "type": "input",
        "description": "Reset input: driving it high enables data transfers, driving it low aborts all transfers and places I/O in high impedance, and it must be low before VCC reaches 2.5 V at power-up."
      },
      {
        "number": "6",
        "name": "I/O",
        "type": "bidirectional",
        "description": "Serial data input/output, with data sampled on SCLK rising edges for writes and output on SCLK falling edges for reads, and high impedance when RST is low."
      },
      {
        "number": "7",
        "name": "SCLK",
        "type": "input",
        "description": "Serial clock input that synchronizes command and data transfers on I/O, and must be low when RST is driven high."
      },
      {
        "number": "8",
        "name": "VCC1",
        "type": "power_in",
        "description": "Backup supply pin, specified at 2.0 V to 5.5 V, which powers the device when VCC2 + 0.2 V is less than VCC1 and provides battery backup of the clock and RAM."
      }
    ],
    "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 ordering table lists the SOP-8 variant only as DS1302M/TR (tape and reel, 2500 pcs per reel); th; The datasheet states that the DIP-8, SOP-8 and MSOP-8 share one pin table, so the SOP-8 numbering is"
        ],
        "pages_sent": 15,
        "cost_usd": 0.0486,
        "at": "2026-10-18T00:15:52"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8758163117128343552",
        "pages": 15,
        "sha256": "610b1880d250ea8d",
        "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": "ds1302m.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": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "ds1302m-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": "860c4c11f2099ab3a3f5d056f10665e1614cdba6ee72b58d05256b23a3e809d7",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}