DS1307ZN+T&R

{
  "schema_version": 1,
  "type": "component",
  "slug": "ds1307zn-t-r",
  "title": "DS1307ZN+T&R",
  "brief": "Analog Devices Inc Maxim Integrated Real Time Clocks, SOP-8. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
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    "clock-timing",
    "ds1307zn+t&r"
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  "component": {
    "mpn": "DS1307ZN+T&R",
    "manufacturer": "Analog Devices Inc Maxim Integrated",
    "package": "SOP-8",
    "pin_count": 8,
    "category": "Clock/Timing",
    "subcategory": "Real Time Clocks",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8551101105892040704",
    "parts": {
      "symbol": "ds1307zn-t-r.kicad_sym",
      "footprint": "ds1307zn-t-r.kicad_mod",
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      "model_3d_plain": "ds1307zn-t-r.glb",
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      "lbr": "ds1307zn-t-r.lbr"
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    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "X1",
        "type": "input",
        "description": "Connection for a standard 32.768kHz quartz crystal (specified CL = 12.5pF). X1 is the input to the internal oscillator; it can alternatively be driven by an external 32.768kHz oscillator (in which case X2 must be floated)."
      },
      {
        "number": "2",
        "name": "X2",
        "type": "output",
        "description": "Output of the internal 32.768kHz oscillator; the other terminal of the external quartz crystal connects here. Must be left floating if an external oscillator is driving X1."
      },
      {
        "number": "3",
        "name": "VBAT",
        "type": "power_in",
        "description": "Backup supply input for a standard 3V lithium cell or other energy source (2.0V to 3.5V, 3V typ). Nominal power-fail trip point is 1.25 x VBAT. Must be tied to ground if a backup supply is not used. A 48mAh lithium cell backs up the DS1307 for >10 years at +25 degC."
      },
      {
        "number": "4",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference (0V) for the device."
      },
      {
        "number": "5",
        "name": "SDA",
        "type": "bidirectional",
        "description": "I2C serial data input/output. Open-drain output requiring an external pullup resistor; pullup voltage may be up to 5.5V independent of VCC. Input logic thresholds: VIL max 0.8V, VIH min 2.2V; VOL max 0.4V at IOL = 5mA."
      },
      {
        "number": "6",
        "name": "SCL",
        "type": "input",
        "description": "I2C serial clock input (0 to 100kHz), used to synchronize data movement on the serial interface. Pullup voltage may be up to 5.5V regardless of VCC."
      },
      {
        "number": "7",
        "name": "SQW/OUT",
        "type": "output",
        "description": "Square-wave/output driver. When the SQWE control-register bit is set, the pin outputs one of four square-wave frequencies (1Hz, 4.096kHz, 8.192kHz, or 32.768kHz). Open-drain; requires an external pullup (up to 5.5V). Operates from either VCC or VBAT; may be left floating if unused."
      },
      {
        "number": "8",
        "name": "VCC",
        "type": "power_in",
        "description": "Primary power supply input (4.5V to 5.5V, 5.0V typ). When VCC is above 1.25 x VBAT the device operates from VCC; when VCC falls below VBAT the device switches to battery-backup mode and inhibits reads/writes while continuing timekeeping."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8551101105892040704",
        "pages": 14,
        "sha256": "4114781b89b9a71a",
        "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": [
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        "file": "ds1307zn-t-r.step",
        "role": "plain",
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        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          4.9,
          1.75
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "07f46cff378d30e6c27dfd5a03092c795323f86d91c71fc7e743f4f418dc553a",
        "checked": "2026-10-07",
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
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        "sha256": "0e77a5a9c1ac348947f5a36d666e63c0fca6dc8b82c020cdf7740dbe124d705c",
        "checked": "2026-11-03",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Analog Devices Inc Maxim Integrated",
      "Package": "SOP-8",
      "Category": "Clock/Timing",
      "Pins": "8"
    }
  },
  "variants": [
    {
      "mpn": "DS1307ZN+T&RZ+",
      "kind": "packaging"
    },
    {
      "mpn": "DS1307ZN+T&R",
      "kind": "packaging"
    },
    {
      "mpn": "DS1307ZN+T&RZ+T&R",
      "kind": "packaging"
    },
    {
      "mpn": "DS1307ZN+T&R+",
      "kind": "packaging"
    }
  ],
  "sections": [
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  "discovery_triggers": [
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  "discovery_pitch": "DS1307ZN+T&R (Analog Devices Inc Maxim Integrated) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
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    "viewers/symbol.html",
    "viewers/footprint.html"
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  "visibility": {
    "public": true
  },
  "updated_at": "2026-09-24T20:05:13.391Z"
}