GN1302

{
  "schema_version": 1,
  "type": "component",
  "slug": "gn1302",
  "title": "GN1302",
  "brief": "GN Semic 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",
    "gn1302"
  ],
  "component": {
    "mpn": "GN1302",
    "manufacturer": "GN Semic",
    "package": "SOP-8",
    "pin_count": 8,
    "category": "RTC",
    "subcategory": "Real-time Clocks (RTC)",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/6e320d0a74d6abdccc26027ff9a7d37b.pdf",
    "parts": {
      "symbol": "gn1302.kicad_sym",
      "footprint": "gn1302.kicad_mod",
      "model_3d": "gn1302-etched.glb",
      "model_3d_plain": "gn1302.glb",
      "model_3d_step": "gn1302-etched.step",
      "model_3d_step_plain": "gn1302.step",
      "lbr": "gn1302.lbr"
    },
    "distributor_links": {
      "lcsc": "C265479"
    },
    "pins": [
      {
        "number": "1",
        "name": "VCC2",
        "type": "power_in",
        "description": "Primary supply pin in the dual-supply configuration. VCC1 is connected to the backup supply and holds time/date when the main supply fails. The GN1302 runs from whichever of VCC1/VCC2 is higher: when VCC2 > VCC1 + 0.2 V, VCC2 powers the chip; when VCC1 > VCC2, VCC1 powers the chip. Operating range 2.0 V to 5.5 V."
      },
      {
        "number": "2",
        "name": "X1",
        "type": "passive",
        "description": "Connection to one terminal of an external 32.768 kHz crystal. Internal oscillator is designed for a crystal with 6 pF load capacitance. May alternatively be driven by an external 32.768 kHz oscillator signal on X1 (X2 left floating)."
      },
      {
        "number": "3",
        "name": "X2",
        "type": "passive",
        "description": "Second terminal of the external 32.768 kHz crystal. Leave floating when X1 is driven by an external oscillator."
      },
      {
        "number": "4",
        "name": "GND",
        "type": "power_in",
        "description": "Power supply ground / reference for VCC1 and VCC2."
      },
      {
        "number": "5",
        "name": "CE",
        "type": "input",
        "description": "Chip-enable input. Must be held high during any read or write on the 3-wire interface; going low terminates the transfer and places I/O in high-impedance. Has an internal ~40 kΩ (typ) pull-down to ground."
      },
      {
        "number": "6",
        "name": "I/O",
        "type": "bidirectional",
        "description": "Bidirectional data pin of the 3-wire serial interface (push-pull output). Data is clocked in on SCLK rising edges and clocked out on SCLK falling edges. Has an internal ~40 kΩ (typ) pull-down to ground."
      },
      {
        "number": "7",
        "name": "SCLK",
        "type": "input",
        "description": "Serial clock input used to synchronize data movement on the 3-wire interface. Has an internal ~40 kΩ (typ) pull-down to ground. Max clock rate 0.5 MHz at VCC=2.0 V, 2.0 MHz at VCC=5.0 V."
      },
      {
        "number": "8",
        "name": "VCC1",
        "type": "power_in",
        "description": "Backup / secondary supply pin, used with a single supply plus a battery, or with a low-power backup battery. When the internal programmable trickle charger is enabled, this pin connects to a rechargeable energy source (e.g. supercap, NiMH). UL requires care to prevent reverse charging current when using a lithium cell."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/6e320d0a74d6abdccc26027ff9a7d37b.pdf",
        "pages": 14,
        "sha256": "8e9ff7eea88fa85c",
        "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": "gn1302.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": "gn1302-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": "2537303f47ca59e5c84efde7ede2651a7220de0081842bb0615105230ea46b62",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "GN Semic",
      "Package": "SOP-8",
      "Category": "RTC",
      "Pins": "8"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "gn1302"
  ],
  "discovery_pitch": "GN1302 (GN Semic) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "gn1302.kicad_sym",
    "gn1302.kicad_mod",
    "gn1302.glb",
    "gn1302.step",
    "gn1302-etched.step",
    "gn1302.lbr",
    "docs/hero.png",
    "docs/gn1302-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "visibility": {
    "public": true
  },
  "updated_at": "2026-09-24T21:06:13.954Z"
}