DS1302ZM

{
  "schema_version": 1,
  "type": "component",
  "slug": "ds1302zm",
  "title": "DS1302ZM",
  "brief": "HGSEMI Real-time Clocks (RTC), SOP-8. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.2.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "rtc",
    "ds1302zm"
  ],
  "component": {
    "mpn": "DS1302ZM",
    "manufacturer": "HGSEMI",
    "package": "SOP-8",
    "pin_count": 8,
    "category": "RTC",
    "subcategory": "Real-time Clocks (RTC)",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/68deaf3fa5c5dc1b61a605fe182b12cc.pdf",
    "parts": {
      "symbol": "ds1302zm.kicad_sym",
      "footprint": "ds1302zm.kicad_mod",
      "model_3d": "ds1302zm-etched.glb",
      "model_3d_plain": "ds1302zm.glb",
      "model_3d_step": "ds1302zm-etched.step",
      "model_3d_step_plain": "ds1302zm.step",
      "lbr": "ds1302zm.lbr"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "VCC2",
        "type": "power_in",
        "description": "Primary power supply pin in a dual-supply configuration (2.0-5.5V). DS1302 draws from the larger of VCC1 or VCC2; VCC2 powers the chip when VCC2 > VCC1 + 0.2V."
      },
      {
        "number": "2",
        "name": "X1",
        "type": "passive",
        "description": "Connection for a 32.768 kHz quartz crystal (specified load capacitance 6 pF). May alternatively be driven by an external 32.768 kHz oscillator signal (with X2 floated)."
      },
      {
        "number": "3",
        "name": "X2",
        "type": "passive",
        "description": "Connection for a 32.768 kHz quartz crystal (specified load capacitance 6 pF). Leave floating if X1 is driven by an external oscillator."
      },
      {
        "number": "4",
        "name": "GND",
        "type": "power_in",
        "description": "Device ground reference."
      },
      {
        "number": "5",
        "name": "RST",
        "type": "input",
        "description": "Reset / chip-enable input (active high per the datasheet: 'The reset signal must be asserted high during a read or a write'). Initiates all data transfers and can terminate single- or multi-byte transfers; when low, the I/O pin goes to high impedance."
      },
      {
        "number": "6",
        "name": "I/O",
        "type": "bidirectional",
        "description": "Bi-directional serial data pin for the 3-wire interface. Tri-states on each rising edge of SCLK during data output; data is clocked in on rising edges and out on falling edges of SCLK."
      },
      {
        "number": "7",
        "name": "SCLK",
        "type": "input",
        "description": "Serial clock input used to synchronize data movement on the 3-wire serial interface. Must be at logic 0 when RST is driven high."
      },
      {
        "number": "8",
        "name": "VCC1",
        "type": "power_in",
        "description": "Backup/low-power supply pin (2.0-5.5V). Connects to a battery or, when the trickle charger is used, to a rechargeable cell or super-cap; powers the DS1302 whenever VCC2 < VCC1."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/68deaf3fa5c5dc1b61a605fe182b12cc.pdf",
        "pages": 16,
        "sha256": "3fcd6fbdc5e0c4e6",
        "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"
    },
    "pin1": {
      "pad": "1",
      "at": [
        -2.475,
        -1.905
      ],
      "corner": "top-left",
      "source": "silk-marker",
      "derived_from": "SOIC-8_3.9x4.9mm_P1.27mm@sha256:074ecb2092b24fa4",
      "mark": "drawn"
    },
    "models_3d": [
      {
        "file": "ds1302zm.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": "ds1302zm-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": "8600d1ba6a65f472728b30d866055d9f50bccfe23ed6841f3f3ae56df5f80f5b",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "HGSEMI",
      "Package": "SOP-8",
      "Category": "RTC",
      "Pins": "8"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "ds1302zm"
  ],
  "discovery_pitch": "DS1302ZM (HGSEMI) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "ds1302zm.kicad_sym",
    "ds1302zm.kicad_mod",
    "ds1302zm.glb",
    "ds1302zm.step",
    "ds1302zm-etched.step",
    "ds1302zm.lbr",
    "docs/hero.png",
    "docs/ds1302zm-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "visibility": {
    "public": true
  },
  "variants": [
    {
      "mpn": "DS1302ZM/TR",
      "kind": "packaging"
    },
    {
      "mpn": "DS1302M/TR",
      "kind": "unknown"
    },
    {
      "mpn": "DS1302N",
      "kind": "unknown"
    },
    {
      "mpn": "DS1302ZN",
      "kind": "unknown"
    },
    {
      "mpn": "DS1302MM/TR",
      "kind": "unknown"
    },
    {
      "mpn": "DS1302ZMM/TR",
      "kind": "packaging"
    },
    {
      "mpn": "DS1302DQ/TR",
      "kind": "unknown"
    },
    {
      "mpn": "DS1302DQ3/TR",
      "kind": "unknown"
    },
    {
      "mpn": "DS1302ZDQ/TR",
      "kind": "unknown"
    },
    {
      "mpn": "DS1302ZDQ3/TR",
      "kind": "unknown"
    }
  ],
  "updated_at": "2026-09-24T20:04:41.381Z"
}