DS1302N

{
  "slug": "ds1302n",
  "version": "0.1.0",
  "type": "component",
  "description": "XBLW Real Time Clocks, DIP-8. Datasheet-verified pinout, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "clock-timing",
    "ds1302n",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "ds1302n.kicad_sym",
    "ds1302n.kicad_mod",
    "ds1302n.glb",
    "ds1302n.step",
    "ds1302n.lbr",
    "docs/hero.png",
    "docs/ds1302n-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "component": {
    "mpn": "DS1302N",
    "manufacturer": "XBLW",
    "package": "DIP-8",
    "pin_count": 8,
    "category": "Clock/Timing",
    "subcategory": "Real Time Clocks",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/1f7d5a21c3fdba48e064a41f8443555b.pdf",
    "parts": {
      "symbol": "ds1302n.kicad_sym",
      "footprint": "ds1302n.kicad_mod",
      "model_3d": "ds1302n-etched.glb",
      "model_3d_plain": "ds1302n.glb",
      "model_3d_step": "ds1302n-etched.step",
      "model_3d_step_plain": "ds1302n.step",
      "lbr": "ds1302n.lbr"
    },
    "distributor_links": {
      "lcsc": "C42395632"
    },
    "pins": [
      {
        "number": "1",
        "name": "VCC2",
        "type": "power_in",
        "description": "Primary power-supply pin in dual-supply configuration; powers the DS1302 when VCC2 > VCC1 + 0.2V; otherwise VCC1 powers the device; operates from 2.0V to 5.5V."
      },
      {
        "number": "2",
        "name": "X1",
        "type": "passive",
        "description": "Crystal input connection for standard 32.768kHz quartz crystal with 6pF specified load capacitance; receives external oscillator signal when an external 32.768kHz oscillator is used (X2 floated in that configuration)."
      },
      {
        "number": "3",
        "name": "X2",
        "type": "passive",
        "description": "Crystal output connection for standard 32.768kHz quartz crystal with 6pF specified load capacitance; floated when an external oscillator drives X1."
      },
      {
        "number": "4",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference; all pin voltages referenced to ground."
      },
      {
        "number": "5",
        "name": "CE",
        "type": "input",
        "description": "Chip enable input; must be asserted high during a read or write; has an internal 40kΩ (typ) pulldown resistor to ground; formerly named RST with no functional change."
      },
      {
        "number": "6",
        "name": "I/O",
        "type": "bidirectional",
        "description": "Bidirectional serial data pin for the 3-wire interface; transfers data to and from the DS1302 in single-byte or burst mode; has an internal 40kΩ (typ) pulldown resistor to ground."
      },
      {
        "number": "7",
        "name": "SCLK",
        "type": "input",
        "description": "Serial clock input used to synchronize data movement on the 3-wire serial interface; has an internal 40kΩ (typ) pulldown resistor to ground."
      },
      {
        "number": "8",
        "name": "VCC1",
        "type": "power_in",
        "description": "Low-power backup supply pin; rechargeable energy source connected here when trickle charger is used; UL recognized to prevent reverse charging current when used with a lithium battery; powers DS1302 when VCC1 > VCC2; operates from 2.0V to 5.5V."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.2",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.2",
        "primary_model": "claude-sonnet-4-6",
        "primary_mode": "vision",
        "consensus_model": "claude-opus-4-7",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 12,
        "cost_usd": 0.1966,
        "at": "2026-09-22T10:55:38"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/1f7d5a21c3fdba48e064a41f8443555b.pdf",
        "pages": 16,
        "sha256": "4dffa2998571d25e",
        "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": "ds1302n.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "body on z = 0, through-hole leads below",
        "extents_mm": [
          7.874,
          9.27,
          6.98
        ],
        "zmin_mm": -3.3,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "4a377a56a8d9e9c0b86c095ef9ecc1869ac19e7f5069a3247b294250bf4f235d",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "ds1302n-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "body on z = 0, through-hole leads below",
        "extents_mm": [
          7.874,
          9.27,
          6.98
        ],
        "zmin_mm": -3.3,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "a14e01ab09c92049bd8828a79aaebafbfff2ac7343629115a78f2c909f59b9c2",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}