DS1307N

{
  "schema_version": 1,
  "type": "component",
  "slug": "ds1307n",
  "title": "DS1307N",
  "brief": "HGSEMI Real Time Clocks, DIP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "clock-timing",
    "ds1307n",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "DS1307N",
    "manufacturer": "HGSEMI",
    "package": "DIP-8",
    "pin_count": 8,
    "category": "Clock/Timing",
    "subcategory": "Real Time Clocks",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8756372559656816640",
    "parts": {
      "symbol": "ds1307n.kicad_sym",
      "footprint": "ds1307n.kicad_mod",
      "model_3d": "ds1307n-hero.glb",
      "model_3d_plain": "ds1307n-etched.glb",
      "model_3d_step": "ds1307n-etched.step",
      "model_3d_step_plain": "ds1307n.step",
      "lbr": "ds1307n.lbr"
    },
    "distributor_links": {
      "lcsc": "C434596",
      "digikey": "DS1307N-ND",
      "mouser": "700-DS1307N-NR"
    },
    "distributor_check": {
      "checked_at": "2026-10-16T04:27:40Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "DS1307N-ND",
        "status": "found",
        "lifecycle": "Obsolete"
      },
      "mouser": {
        "pn": "700-DS1307N-NR",
        "status": "found",
        "lifecycle": "Obsolete"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "X1",
        "type": "passive",
        "description": "Connection for the standard 32.768 kHz quartz crystal; it can alternatively be driven by an external 32.768 kHz oscillator output, with X2 left floating."
      },
      {
        "number": "2",
        "name": "X2",
        "type": "passive",
        "description": "Connection for the other terminal of the 32.768 kHz crystal, which is specified for a 12.5 pF crystal load capacitance; left unconnected when X1 is driven by an external oscillator."
      },
      {
        "number": "3",
        "name": "VBAT",
        "type": "power_in",
        "description": "+3 V battery input for a standard 3 V lithium cell or other backup supply; the battery voltage must be kept between 2.0 V and 3.5 V for proper operation."
      },
      {
        "number": "4",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference for the device."
      },
      {
        "number": "5",
        "name": "SDA",
        "type": "bidirectional",
        "description": "I2C serial data input/output, open-drain; it requires an external pull-up resistor."
      },
      {
        "number": "6",
        "name": "SCL",
        "type": "input",
        "description": "I2C serial clock input that synchronizes data transfer on the serial interface; the datasheet pin table describes it as open-drain."
      },
      {
        "number": "7",
        "name": "SQW/OUT",
        "type": "output",
        "description": "Open-drain square-wave/output driver that requires an external pull-up resistor; when SQWE is 1 it outputs 1 Hz, 4.096 kHz, 8.192 kHz or 32.768 kHz, and it can operate from either the VCC or VBAT supply."
      },
      {
        "number": "8",
        "name": "VCC",
        "type": "power_in",
        "description": "+5 V supply input; the recommended operating range is 4.5 V to 5.5 V, and below 1.25×VBAT the device blocks RTC and RAM access."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
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        "primary_model": "claude-haiku-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The datasheet's pin table is in Chinese; pin names and functions were translated into English descri; The datasheet pin table labels SCL as open-drain, but the I2C input role is the typical reading; SCL; The ordering table lists DS1307N in DIP-8 (datasheet page 1). The DS1307 (non-Z) variant is rated 0 "
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        "cost_usd": 0.0514,
        "at": "2026-10-16T04:27:26"
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        "pages": 14,
        "sha256": "99d95856b4d3f840",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 8,
        "described": 8,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
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        "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
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        "zmin_mm": -3.3,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "4a377a56a8d9e9c0b86c095ef9ecc1869ac19e7f5069a3247b294250bf4f235d",
        "checked": "2026-10-16",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "HGSEMI",
      "Package": "DIP-8",
      "Category": "Clock/Timing",
      "Pins": "8"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "99d95856b4d3f840893b52984a7b764d02ed4be716e26e677ba24fa01b9e4333",
      "rows": [
        {
          "name": "Supply voltage",
          "symbol": "VCC",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 4.5,
          "typ": 5,
          "max": 5.5,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Logic 1 input voltage",
          "symbol": "VIH",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 2.2,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Logic 0 input voltage",
          "symbol": "VIL",
          "kind": "recommended_operating",
          "unit": "V",
          "min": -0.5,
          "typ": null,
          "max": 0.8,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Battery voltage",
          "symbol": "VBAT",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 2,
          "typ": null,
          "max": 3.5,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Voltage on any pin to ground",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.5,
          "typ": null,
          "max": 7,
          "conditions": "",
          "source_page": 3,
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        },
        {
          "name": "Storage temperature",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -55,
          "typ": null,
          "max": 125,
          "conditions": "",
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        },
        {
          "name": "Operating temperature (DS1307, commercial)",
          "symbol": "",
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          "unit": "°C",
          "min": 0,
          "typ": null,
          "max": 70,
          "conditions": "",
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        },
        {
          "name": "Soldering temperature",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 260,
          "conditions": "10 s",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Input leakage current (SCL)",
          "symbol": "ILI",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": null,
          "max": 1,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "I/O leakage current (SDA & SQW/OUT)",
          "symbol": "ILO",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": null,
          "max": 1,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Logic 0 output voltage",
          "symbol": "VOL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.4,
          "conditions": "IOL=5mA",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Operating supply current",
          "symbol": "ICCA",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 1.5,
          "conditions": "Note 7: SCL at maximum frequency, 100kHz",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Standby supply current",
          "symbol": "ICCS",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": null,
          "max": 200,
          "conditions": "Note 1: VCC, SDA and SCL at 5.0V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Battery current (oscillator ON, SQW/OUT OFF)",
          "symbol": "IBAT1",
          "kind": "electrical",
          "unit": "nA",
          "min": null,
          "typ": 300,
          "max": 500,
          "conditions": "Note 2: VCC=0V, VBAT=3V; SQW/OUT OFF",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Battery current (oscillator ON, SQW/OUT ON 32kHz)",
          "symbol": "IBAT2",
          "kind": "electrical",
          "unit": "nA",
          "min": null,
          "typ": 480,
          "max": 800,
          "conditions": "Oscillator ON; SQW/OUT ON (32kHz)",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "SCL clock frequency",
          "symbol": "fSCL",
          "kind": "timing",
          "unit": "kHz",
          "min": 0,
          "typ": null,
          "max": 100,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Bus idle time between STOP and START",
          "symbol": "tBUF",
          "kind": "timing",
          "unit": "µs",
          "min": 4.7,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "START condition hold time",
          "symbol": "tHDSTA",
          "kind": "timing",
          "unit": "µs",
          "min": 4,
          "typ": null,
          "max": null,
          "conditions": "Note 3",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "SCL low period",
          "symbol": "tLOW",
          "kind": "timing",
          "unit": "µs",
          "min": 4.7,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "SCL high period",
          "symbol": "tHIGH",
          "kind": "timing",
          "unit": "µs",
          "min": 4,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "START condition setup time",
          "symbol": "tSUSTA",
          "kind": "timing",
          "unit": "µs",
          "min": 4.7,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Data hold time",
          "symbol": "tHDDAT",
          "kind": "timing",
          "unit": "µs",
          "min": 0,
          "typ": null,
          "max": null,
          "conditions": "Notes 4, 5",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Data setup time",
          "symbol": "tSUDAT",
          "kind": "timing",
          "unit": "ns",
          "min": 250,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "SDA and SCL rise time",
          "symbol": "tR",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": null,
          "max": 1000,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "SDA and SCL fall time",
          "symbol": "tF",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": null,
          "max": 300,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "STOP condition setup time",
          "symbol": "tSUSTO",
          "kind": "timing",
          "unit": "µs",
          "min": 4.7,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Capacitive load per bus",
          "symbol": "CB",
          "kind": "timing",
          "unit": "pF",
          "min": null,
          "typ": null,
          "max": 400,
          "conditions": "Note 6: CB = total bus capacitance",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "I/O capacitance",
          "symbol": "CI/O",
          "kind": "electrical",
          "unit": "pF",
          "min": null,
          "typ": null,
          "max": 10,
          "conditions": "TA=25℃",
          "source_page": 4,
          "source": "datasheet"
        }
      ]
    }
  },
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  "discovery_pitch": "DS1307N (HGSEMI) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
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