GC1307

{
  "schema_version": 1,
  "type": "component",
  "slug": "gc1307",
  "title": "GC1307",
  "brief": "Gcore 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",
    "gc1307"
  ],
  "component": {
    "mpn": "GC1307",
    "manufacturer": "Gcore",
    "package": "SOP-8",
    "pin_count": 8,
    "category": "RTC",
    "subcategory": "Real-time Clocks (RTC)",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/a96a0a24e062a4eeb4186876848ecd9d.pdf",
    "parts": {
      "symbol": "gc1307.kicad_sym",
      "footprint": "gc1307.kicad_mod",
      "model_3d": "gc1307-etched.glb",
      "model_3d_plain": "gc1307.glb",
      "model_3d_step": "gc1307-etched.step",
      "model_3d_step_plain": "gc1307.step",
      "lbr": "gc1307.lbr"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "X1",
        "type": "input",
        "description": "Oscillator input. Connect to a standard 32.768 kHz crystal with a 12.5 pF load capacitance (CL). May alternatively be driven by an external 32.768 kHz oscillator, in which case X2 must be left floating."
      },
      {
        "number": "2",
        "name": "X2",
        "type": "output",
        "description": "Oscillator output. Connect to the 32.768 kHz crystal opposite X1. Leave floating when X1 is driven by an external oscillator."
      },
      {
        "number": "3",
        "name": "VBAT",
        "type": "power_in",
        "description": "Backup supply input for a standard 3 V lithium cell or other backup source (2.0 V to 3.5 V typical). Must be within the min/max limits for correct operation; tie to GND if backup is not used. RTC/RAM access is disabled below the power-fail trip point VPF = 1.25 x VBAT. A >48 mAh Li cell provides >10 years of backup at +25 C."
      },
      {
        "number": "4",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference for all supplies and I/O."
      },
      {
        "number": "5",
        "name": "SDA",
        "type": "bidirectional",
        "description": "I2C serial data input/output. Open-drain; requires an external pull-up resistor. The pull-up voltage may be as high as 5.5 V regardless of VCC."
      },
      {
        "number": "6",
        "name": "SCL",
        "type": "input",
        "description": "I2C serial clock input used to synchronise data transfers on SDA. The pull-up voltage may be as high as 5.5 V regardless of VCC. Standard-mode 100 kHz only."
      },
      {
        "number": "7",
        "name": "SQW/OUT",
        "type": "output",
        "description": "Square-wave / output driver. When enabled (SQWE=1) drives one of four frequencies (1 Hz, 4.096 kHz, 8.192 kHz, 32.768 kHz). Open-drain; requires an external pull-up (up to 5.5 V). Powered from VCC or VBAT. Leave floating if unused."
      },
      {
        "number": "8",
        "name": "VCC",
        "type": "power_in",
        "description": "Main supply (4.5 V to 5.5 V, 5.0 V typical). Full device access when VCC is in range. When VBAT is present and VCC falls below VTP (~1.25 x VBAT), read/write is inhibited; timekeeping continues on VBAT."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/a96a0a24e062a4eeb4186876848ecd9d.pdf",
        "pages": 13,
        "sha256": "03896c33df3fb5e7",
        "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"
    }
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Gcore",
      "Package": "SOP-8",
      "Category": "RTC",
      "Pins": "8"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "gc1307"
  ],
  "discovery_pitch": "GC1307 (Gcore) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "gc1307.kicad_sym",
    "gc1307.kicad_mod",
    "gc1307.glb",
    "gc1307.step",
    "gc1307-etched.step",
    "gc1307.lbr",
    "docs/hero.png",
    "docs/gc1307-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "visibility": {
    "public": true
  },
  "updated_at": "2026-09-24T20:53:44.268Z"
}