DS1302ZMM

{
  "slug": "ds1302zmm",
  "version": "0.1.0",
  "type": "component",
  "description": "HGSEMI Real Time Clocks, MSOP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "clock-timing",
    "ds1302zmm",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "ds1302zmm.kicad_sym",
    "ds1302zmm.kicad_mod",
    "ds1302zmm.glb",
    "ds1302zmm.step",
    "ds1302zmm.lbr",
    "docs/hero.png",
    "docs/ds1302zmm-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "ds1302zmm-hero.glb",
    "ds1302zmm-hero.overlay.json",
    "ds1302zmm-etched.glb"
  ],
  "component": {
    "mpn": "DS1302ZMM",
    "manufacturer": "HGSEMI",
    "package": "MSOP-8",
    "pin_count": 8,
    "category": "Clock/Timing",
    "subcategory": "Real Time Clocks",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8758163126850064384",
    "parts": {
      "symbol": "ds1302zmm.kicad_sym",
      "footprint": "ds1302zmm.kicad_mod",
      "model_3d": "ds1302zmm-hero.glb",
      "model_3d_plain": "ds1302zmm-etched.glb",
      "model_3d_step": "ds1302zmm-etched.step",
      "model_3d_step_plain": "ds1302zmm.step",
      "lbr": "ds1302zmm.lbr"
    },
    "distributor_links": {
      "lcsc": "C7432287"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T16:48:08Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "VCC2",
        "type": "power_in",
        "description": "Primary supply pin for dual-supply systems; the DS1302 runs from whichever of VCC1 or VCC2 is higher, and VCC2 is specified at 2.0 V to 5.5 V."
      },
      {
        "number": "2",
        "name": "X1",
        "type": "passive",
        "description": "Connects to one terminal of the 32.768 kHz crystal, which should present a 6 pF load capacitance."
      },
      {
        "number": "3",
        "name": "X2",
        "type": "passive",
        "description": "Connects to the other terminal of the 32.768 kHz crystal, which should present a 6 pF load capacitance."
      },
      {
        "number": "4",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference for the device."
      },
      {
        "number": "5",
        "name": "RST",
        "type": "input",
        "description": "Reset/enable input: driving it high starts a data transfer, driving it low terminates the transfer and puts 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; input data is valid on SCLK rising edges, output data changes on SCLK falling edges, and the pin goes high-impedance when RST is low."
      },
      {
        "number": "7",
        "name": "SCLK",
        "type": "input",
        "description": "Serial clock input that synchronizes all data transfers, and it must be low when RST is driven high."
      },
      {
        "number": "8",
        "name": "VCC1",
        "type": "power_in",
        "description": "Backup supply pin for battery or super-capacitor backup of the clock and RAM; the DS1302 runs from whichever of VCC1 or VCC2 is higher, and VCC1 is specified at 2.0 V to 5.5 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: Pin numbers and names are taken from the pin-description table on page 2, which covers DIP-8/SOP-8/M; Pin types are inferred from function, since the datasheet does not give electrical types. X1 and X2 "
        ],
        "pages_sent": 15,
        "cost_usd": 0.0535,
        "at": "2026-10-18T16:46:05"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8758163126850064384",
        "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": "ds1302zmm.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          4.9,
          3.0,
          0.95
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "847c4c5023fe1603fbd36900a5dcc4bd3901ba473f71d42c9a469f0236eaadf3",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "ds1302zmm-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          4.9,
          3.0,
          0.95
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "9ebf7f7271f21926a83159625e127ac1076595ef67dc63883ccaf9bcf546ca26",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}