DS1302ZMM

{
  "schema_version": 1,
  "type": "component",
  "slug": "ds1302zmm",
  "title": "DS1302ZMM",
  "brief": "HGSEMI Real Time Clocks, MSOP-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",
    "ds1302zmm",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "DS1302ZMM",
    "manufacturer": "HGSEMI",
    "package": "MSOP-8",
    "pin_count": 8,
    "category": "Clock/Timing",
    "subcategory": "Real Time Clocks",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8758163126850064384",
    "parts": {
      "symbol": "ds1302zmm.kicad_sym",
      "footprint": "ds1302zmm.kicad_mod",
      "model_3d": "ds1302zmm-hero.glb",
      "model_3d_plain": "ds1302zmm-etched.glb",
      "model_3d_step": "ds1302zmm-etched.step",
      "model_3d_step_plain": "ds1302zmm.step",
      "lbr": "ds1302zmm.lbr"
    },
    "distributor_links": {
      "lcsc": "C7432287"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T16:48:08Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "VCC2",
        "type": "power_in",
        "description": "Primary supply pin for dual-supply systems; the DS1302 runs from whichever of VCC1 or VCC2 is higher, and VCC2 is specified at 2.0 V to 5.5 V."
      },
      {
        "number": "2",
        "name": "X1",
        "type": "passive",
        "description": "Connects to one terminal of the 32.768 kHz crystal, which should present a 6 pF load capacitance."
      },
      {
        "number": "3",
        "name": "X2",
        "type": "passive",
        "description": "Connects to the other terminal of the 32.768 kHz crystal, which should present a 6 pF load capacitance."
      },
      {
        "number": "4",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference for the device."
      },
      {
        "number": "5",
        "name": "RST",
        "type": "input",
        "description": "Reset/enable input: driving it high starts a data transfer, driving it low terminates the transfer and puts I/O in high impedance, and it must be low before VCC reaches 2.5 V at power-up."
      },
      {
        "number": "6",
        "name": "I/O",
        "type": "bidirectional",
        "description": "Serial data input/output; input data is valid on SCLK rising edges, output data changes on SCLK falling edges, and the pin goes high-impedance when RST is low."
      },
      {
        "number": "7",
        "name": "SCLK",
        "type": "input",
        "description": "Serial clock input that synchronizes all data transfers, and it must be low when RST is driven high."
      },
      {
        "number": "8",
        "name": "VCC1",
        "type": "power_in",
        "description": "Backup supply pin for battery or super-capacitor backup of the clock and RAM; the DS1302 runs from whichever of VCC1 or VCC2 is higher, and VCC1 is specified at 2.0 V to 5.5 V."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "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: Pin numbers and names are taken from the pin-description table on page 2, which covers DIP-8/SOP-8/M; Pin types are inferred from function, since the datasheet does not give electrical types. X1 and X2 "
        ],
        "pages_sent": 15,
        "cost_usd": 0.0535,
        "at": "2026-10-18T16:46:05"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8758163126850064384",
        "pages": 15,
        "sha256": "610b1880d250ea8d",
        "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": "ds1302zmm.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          4.9,
          3,
          0.95
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "847c4c5023fe1603fbd36900a5dcc4bd3901ba473f71d42c9a469f0236eaadf3",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "ds1302zmm-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          4.9,
          3,
          0.95
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "9ebf7f7271f21926a83159625e127ac1076595ef67dc63883ccaf9bcf546ca26",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "HGSEMI",
      "Package": "MSOP-8",
      "Category": "Clock/Timing",
      "Pins": "8"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "610b1880d250ea8d867af546ab2639122bff2d499989832c60fa262bba3e44c5",
      "rows": [
        {
          "name": "Supply voltage",
          "symbol": "VCC1，VCC2",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 2,
          "typ": null,
          "max": 5.5,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Logic 1 input voltage",
          "symbol": "VIH",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 2,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Logic 0 input voltage",
          "symbol": "VIL",
          "kind": "recommended_operating",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 0.3,
          "conditions": "VCC=2.0V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Logic 0 input voltage",
          "symbol": "VIL",
          "kind": "recommended_operating",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 0.8,
          "conditions": "VCC=5V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Input capacitance",
          "symbol": "CI",
          "kind": "electrical",
          "unit": "pF",
          "min": null,
          "typ": null,
          "max": 10,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "I/O capacitance",
          "symbol": "CI/O",
          "kind": "electrical",
          "unit": "pF",
          "min": null,
          "typ": null,
          "max": 15,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Crystal oscillator capacitance",
          "symbol": "CX",
          "kind": "electrical",
          "unit": "pF",
          "min": null,
          "typ": null,
          "max": 6,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Input current",
          "symbol": "ILI",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": null,
          "max": 500,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "I/O leakage current",
          "symbol": "ILO",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": null,
          "max": 500,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Logic 1 output voltage",
          "symbol": "VOH",
          "kind": "electrical",
          "unit": "V",
          "min": 1.6,
          "typ": null,
          "max": null,
          "conditions": "VCC=2.5V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Logic 1 output voltage",
          "symbol": "VOH",
          "kind": "electrical",
          "unit": "V",
          "min": 2.4,
          "typ": null,
          "max": null,
          "conditions": "VCC=5V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Logic 0 output voltage",
          "symbol": "VOL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.4,
          "conditions": "VCC=2.5V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Active supply current (VCC1)",
          "symbol": "ICC1A",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 0.4,
          "conditions": "VCC1=2.5V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Active supply current (VCC1)",
          "symbol": "ICC1A",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 1.2,
          "conditions": "VCC1=5V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Timekeeping current (VCC1)",
          "symbol": "ICC1T",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": null,
          "max": 0.3,
          "conditions": "VCC1=2.5V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Timekeeping current (VCC1)",
          "symbol": "ICC1T",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": null,
          "max": 1,
          "conditions": "VCC1=5V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Static current (VCC1)",
          "symbol": "ICC1S",
          "kind": "electrical",
          "unit": "nA",
          "min": null,
          "typ": null,
          "max": 100,
          "conditions": "VCC1=2.5V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Active supply current (VCC2)",
          "symbol": "ICC2A",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 0.425,
          "conditions": "VCC2=2.5V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Active supply current (VCC2)",
          "symbol": "ICC2A",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 1.28,
          "conditions": "VCC2=5V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Timekeeping current (VCC2)",
          "symbol": "ICC2T",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": null,
          "max": 25.3,
          "conditions": "VCC2=2.5V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Timekeeping current (VCC2)",
          "symbol": "ICC2T",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": null,
          "max": 81,
          "conditions": "VCC2=5V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Static current (VCC2)",
          "symbol": "ICC2S",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": null,
          "max": 25,
          "conditions": "VCC2=2.5V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Static current (VCC2)",
          "symbol": "ICC2S",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": null,
          "max": 80,
          "conditions": "VCC2=5V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "CLK to RST hold time",
          "symbol": "tcch",
          "kind": "timing",
          "unit": "ns",
          "min": 240,
          "typ": null,
          "max": null,
          "conditions": "VCC=2V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "CLK to RST hold time",
          "symbol": "tcch",
          "kind": "timing",
          "unit": "ns",
          "min": 60,
          "typ": null,
          "max": null,
          "conditions": "VCC=5V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "RST inactive time",
          "symbol": "tcwh",
          "kind": "timing",
          "unit": "ns",
          "min": 4,
          "typ": null,
          "max": null,
          "conditions": "VCC=2V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "RST inactive time",
          "symbol": "tcwh",
          "kind": "timing",
          "unit": "ns",
          "min": 1,
          "typ": null,
          "max": null,
          "conditions": "VCC=5V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "RST to I/O high-Z",
          "symbol": "tcdz",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": null,
          "max": 280,
          "conditions": "VCC=2V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "RST to I/O high-Z",
          "symbol": "tcdz",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": null,
          "max": 70,
          "conditions": "VCC=5V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "SCLK to I/O high-Z",
          "symbol": "tccz",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": null,
          "max": 280,
          "conditions": "VCC=2V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "SCLK to I/O high-Z",
          "symbol": "tccz",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": null,
          "max": 70,
          "conditions": "VCC=5V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Data to CLK setup time",
          "symbol": "tdc",
          "kind": "timing",
          "unit": "ns",
          "min": 200,
          "typ": null,
          "max": null,
          "conditions": "VCC=2V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Data to CLK setup time",
          "symbol": "tdc",
          "kind": "timing",
          "unit": "ns",
          "min": 50,
          "typ": null,
          "max": null,
          "conditions": "VCC=5V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "CLK to Data hold time",
          "symbol": "tcdh",
          "kind": "timing",
          "unit": "ns",
          "min": 280,
          "typ": null,
          "max": null,
          "conditions": "VCC=2V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "CLK to Data hold time",
          "symbol": "tcdh",
          "kind": "timing",
          "unit": "ns",
          "min": 70,
          "typ": null,
          "max": null,
          "conditions": "VCC=5V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "CLK to Data delay",
          "symbol": "tcdd",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": null,
          "max": 800,
          "conditions": "VCC=2V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "CLK to Data delay",
          "symbol": "tcdd",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": null,
          "max": 200,
          "conditions": "VCC=5V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "CLK low time",
          "symbol": "tcl",
          "kind": "timing",
          "unit": "ns",
          "min": 1000,
          "typ": null,
          "max": null,
          "conditions": "VCC=2V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "CLK low time",
          "symbol": "tcl",
          "kind": "timing",
          "unit": "ns",
          "min": 250,
          "typ": null,
          "max": null,
          "conditions": "VCC=5V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "CLK high time",
          "symbol": "tch",
          "kind": "timing",
          "unit": "ns",
          "min": 1000,
          "typ": null,
          "max": null,
          "conditions": "VCC=2V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "CLK high time",
          "symbol": "tch",
          "kind": "timing",
          "unit": "ns",
          "min": 250,
          "typ": null,
          "max": null,
          "conditions": "VCC=5V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "CLK frequency",
          "symbol": "tclk",
          "kind": "timing",
          "unit": "MHz",
          "min": null,
          "typ": null,
          "max": 0.5,
          "conditions": "VCC=2V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "CLK frequency",
          "symbol": "tclk",
          "kind": "timing",
          "unit": "MHz",
          "min": null,
          "typ": null,
          "max": 2,
          "conditions": "VCC=5V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "CLK rise and fall time",
          "symbol": "tr，tf",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": null,
          "max": 2000,
          "conditions": "VCC=2V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "CLK rise and fall time",
          "symbol": "tr，tf",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": null,
          "max": 500,
          "conditions": "VCC=5V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "RST to CLK setup time",
          "symbol": "tCC",
          "kind": "timing",
          "unit": "µs",
          "min": 4,
          "typ": null,
          "max": null,
          "conditions": "VCC=2V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "RST to CLK setup time",
          "symbol": "tCC",
          "kind": "timing",
          "unit": "µs",
          "min": 1,
          "typ": null,
          "max": null,
          "conditions": "VCC=5V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Voltage on any pin to ground",
          "symbol": "VP",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.5,
          "typ": null,
          "max": 7,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Operating temperature (DS1302Z)",
          "symbol": "TA",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": -40,
          "typ": null,
          "max": 85,
          "conditions": "DS1302Z",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Storage temperature",
          "symbol": "TS",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": -55,
          "typ": null,
          "max": 125,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Soldering temperature",
          "symbol": "TH",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": null,
          "typ": null,
          "max": 260,
          "conditions": "10 s",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Trickle charge resistor R1",
          "symbol": "R1",
          "kind": "electrical",
          "unit": "kΩ",
          "min": null,
          "typ": 2,
          "max": null,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Trickle charge resistor R2",
          "symbol": "R2",
          "kind": "electrical",
          "unit": "kΩ",
          "min": null,
          "typ": 4,
          "max": null,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Trickle charge resistor R3",
          "symbol": "R3",
          "kind": "electrical",
          "unit": "kΩ",
          "min": null,
          "typ": 8,
          "max": null,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Trickle charge diode forward voltage drop",
          "symbol": "VTD",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 0.7,
          "max": null,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        }
      ]
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "ds1302zmm"
  ],
  "discovery_pitch": "DS1302ZMM (HGSEMI) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "ds1302zmm.kicad_sym",
    "ds1302zmm.kicad_mod",
    "ds1302zmm.glb",
    "ds1302zmm.step",
    "ds1302zmm.lbr",
    "docs/hero.png",
    "docs/ds1302zmm-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "ds1302zmm-hero.glb",
    "ds1302zmm-hero.overlay.json",
    "ds1302zmm-etched.glb"
  ],
  "visibility": {
    "public": true
  }
}