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Ray Set visibility: public ffd8b41 7d ago
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{
  "schema_version": 1,
  "type": "component",
  "slug": "ds1388z-33-t-r",
  "title": "DS1388Z-33+T&R",
  "brief": "Analog Devices Inc Maxim Integrated Real Time Clocks, SO-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",
    "ds1388z-33+t&r",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "DS1388Z-33+T&R",
    "manufacturer": "Analog Devices Inc Maxim Integrated",
    "package": "SO-8",
    "pin_count": 8,
    "category": "Clock/Timing",
    "subcategory": "Real Time Clocks",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590227755083603968",
    "parts": {
      "symbol": "ds1388z-33-t-r.kicad_sym",
      "footprint": "ds1388z-33-t-r.kicad_mod",
      "model_3d": "ds1388z-33-t-r-hero.glb",
      "model_3d_plain": "ds1388z-33-t-r-etched.glb",
      "model_3d_step": "ds1388z-33-t-r-etched.step",
      "model_3d_step_plain": "ds1388z-33-t-r.step",
      "lbr": "ds1388z-33-t-r.lbr"
    },
    "distributor_links": {
      "lcsc": "C118483"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T10:47:25Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "X1",
        "type": "passive",
        "description": "Connection for a standard 32.768kHz quartz crystal (specified load capacitance CL of 6.0pF); X1 is the oscillator input and can optionally be driven by an external 32.768kHz oscillator."
      },
      {
        "number": "2",
        "name": "X2",
        "type": "passive",
        "description": "Output of the internal oscillator for the 32.768kHz crystal, left unconnected when an external oscillator drives pin X1."
      },
      {
        "number": "3",
        "name": "VBACKUP",
        "type": "power_in",
        "description": "Secondary power supply input that must be held between 1.3V and 5.5V for proper operation, and must be connected to ground if not used."
      },
      {
        "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, requiring an external pullup resistor; the datasheet specifies a logic 0 output limit of VOL = 0.15 x VCC at up to 3 mA."
      },
      {
        "number": "6",
        "name": "SCL",
        "type": "input",
        "description": "I2C serial clock input used to synchronize data movement on the serial interface."
      },
      {
        "number": "7",
        "name": "RST",
        "type": "bidirectional",
        "description": "Active-low open-drain reset output that is driven low when VCC falls below VPF and also accepts a debounced pushbutton reset input; it has an internal 50k nominal pullup to VCC and no external pullup should be connected."
      },
      {
        "number": "8",
        "name": "VCC",
        "type": "power_in",
        "description": "DC power pin for the primary power supply (supply range for DS1388Z-33 is 2.97V to 3.63V per the recommended operating conditions)."
      }
    ],
    "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: The T&R suffix denotes tape-and-reel packaging only. Ordering information (page 1) lists DS1388Z-33+; The SO top-view diagram text on page 1 is garbled in extraction, so the pin-to-position mapping was ; Pin types are inferred for KiCad ERC: X1 and X2 are marked passive because they are crystal connecti"
        ],
        "pages_sent": 7,
        "cost_usd": 0.0419,
        "at": "2026-10-18T10:45:48"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590227755083603968",
        "pages": 19,
        "sha256": "2650ce0d603f3f1f",
        "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": "ds1388z-33-t-r.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          4.9,
          1.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "07f46cff378d30e6c27dfd5a03092c795323f86d91c71fc7e743f4f418dc553a",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "ds1388z-33-t-r-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          4.9,
          1.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "28e5c746bdd7a08433a41c5414435b19c1fe99d9c4ed3bc8b7a0a0853e3b11bb",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Analog Devices Inc Maxim Integrated",
      "Package": "SO-8",
      "Category": "Clock/Timing",
      "Pins": "8"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "2650ce0d603f3f1f2f4996c1b8f3f4060668c839cf8a85f61c9ab7cd33d5b4b3",
      "rows": [
        {
          "name": "Supply Voltage",
          "symbol": "VCC",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 2.97,
          "typ": 3.3,
          "max": 3.63,
          "conditions": "DS1388Z-33; Note 3",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Logic 0",
          "symbol": "VIL",
          "kind": "recommended_operating",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": null,
          "conditions": "Note 3; max printed as 0.3 x VCC",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Pullup Voltage (SCL, SDA)",
          "symbol": "VPU",
          "kind": "recommended_operating",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 5.5,
          "conditions": "VCC = 0V",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "VBACKUP Voltage",
          "symbol": "VBACKUP",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 1.3,
          "typ": 3,
          "max": 5.5,
          "conditions": "Note 3",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Power-Fail Voltage",
          "symbol": "VPF",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 2.7,
          "typ": 2.88,
          "max": 2.97,
          "conditions": "DS1388Z-33; Note 3",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Voltage Range on VCC or VBACKUP Pins Relative to Ground",
          "symbol": "VCC/VBACKUP",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 6,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
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        {
          "name": "Voltage Range on Inputs Relative to Ground",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": null,
          "conditions": "max printed as VCC + 0.3V",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Operating Temperature Range",
          "symbol": "TA",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 85,
          "conditions": "noncondensing",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Storage Temperature Range",
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          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -55,
          "typ": null,
          "max": 125,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Lead Temperature (soldering, 10s)",
          "symbol": "",
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          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 300,
          "conditions": "soldering, 10s",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Soldering Temperature (reflow)",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 260,
          "conditions": "reflow",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Input Leakage (SCL)",
          "symbol": "ILI",
          "kind": "electrical",
          "unit": "μA",
          "min": -1,
          "typ": null,
          "max": 1,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "I/O Leakage (SDA)",
          "symbol": "ILO",
          "kind": "electrical",
          "unit": "μA",
          "min": -1,
          "typ": null,
          "max": 1,
          "conditions": "",
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          "source": "datasheet"
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        {
          "name": "I/O Leakage (RST)",
          "symbol": "ILORST",
          "kind": "electrical",
          "unit": "μA",
          "min": -200,
          "typ": null,
          "max": 10,
          "conditions": "Note 8",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "SDA Logic 0 Output",
          "symbol": "IOLDOUT",
          "kind": "electrical",
          "unit": "mA",
          "min": 3,
          "typ": null,
          "max": null,
          "conditions": "VOL = 0.15 x VCC",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "RST Logic 0 Output",
          "symbol": "IOLSIR",
          "kind": "electrical",
          "unit": "mA",
          "min": 3,
          "typ": null,
          "max": null,
          "conditions": "VCC > 2V; VOL = 0.4V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "RST Logic 0 Output",
          "symbol": "IOLSIR",
          "kind": "electrical",
          "unit": "μA",
          "min": 250,
          "typ": null,
          "max": null,
          "conditions": "1.3V < VCC < 1.8V; VOL = 0.2 x VCC",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "VCC Active Current, EEPROM Write Cycle",
          "symbol": "ICCEW",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 0.7,
          "conditions": "DS1388Z-33; Note 9",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "VCC Active Current, EEPROM Read, I2C Read/Write Access",
          "symbol": "ICCER",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": null,
          "max": 250,
          "conditions": "DS1388Z-33; Note 9",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "VCC Standby Current",
          "symbol": "ICCS",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 100,
          "max": 150,
          "conditions": "DS1388Z-33; Note 10",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "VBACKUP Leakage Current",
          "symbol": "IBACKUPLKG",
          "kind": "electrical",
          "unit": "nA",
          "min": null,
          "typ": 15,
          "max": 100,
          "conditions": "VBACKUP = 3.7V, VCC = VCC(MAX)",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "VBACKUP Current, OSC On (EOSC = 0), SDA = SCL = 0V",
          "symbol": "IBACKUP",
          "kind": "electrical",
          "unit": "nA",
          "min": null,
          "typ": 410,
          "max": 550,
          "conditions": "VCC = 0V, VBACKUP = 3.7V, TA = +25°C; Note 11",
          "source_page": 3,
          "source": "datasheet"
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        {
          "name": "VBACKUP Current, OSC Off (EOSC = 1), SDA = SCL = 0V (Data Retention)",
          "symbol": "IBACKUPDR",
          "kind": "electrical",
          "unit": "nA",
          "min": null,
          "typ": 10,
          "max": 100,
          "conditions": "VCC = 0V, VBACKUP = 3.7V, TA = +25°C; Note 11",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "SCL Clock Frequency",
          "symbol": "fSCL",
          "kind": "timing",
          "unit": "kHz",
          "min": 100,
          "typ": null,
          "max": 400,
          "conditions": "Fast mode",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "SCL Clock Frequency",
          "symbol": "fSCL",
          "kind": "timing",
          "unit": "kHz",
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          "typ": null,
          "max": 100,
          "conditions": "Standard mode",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Bus Free Time Between a STOP and START Condition",
          "symbol": "tBUF",
          "kind": "timing",
          "unit": "μs",
          "min": 1.3,
          "typ": null,
          "max": null,
          "conditions": "Fast mode",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Bus Free Time Between a STOP and START Condition",
          "symbol": "tBUF",
          "kind": "timing",
          "unit": "μs",
          "min": 4.7,
          "typ": null,
          "max": null,
          "conditions": "Standard mode",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Hold Time (Repeated) START Condition",
          "symbol": "tHD:STA",
          "kind": "timing",
          "unit": "μs",
          "min": 0.6,
          "typ": null,
          "max": null,
          "conditions": "Fast mode; Note 12",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Hold Time (Repeated) START Condition",
          "symbol": "tHD:STA",
          "kind": "timing",
          "unit": "μs",
          "min": 4,
          "typ": null,
          "max": null,
          "conditions": "Standard mode; Note 12",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "LOW Period of SCL Clock",
          "symbol": "tLOW",
          "kind": "timing",
          "unit": "μs",
          "min": 1.3,
          "typ": null,
          "max": null,
          "conditions": "Fast mode",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "LOW Period of SCL Clock",
          "symbol": "tLOW",
          "kind": "timing",
          "unit": "μs",
          "min": 4.7,
          "typ": null,
          "max": null,
          "conditions": "Standard mode",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "HIGH Period of SCL Clock",
          "symbol": "tHIGH",
          "kind": "timing",
          "unit": "μs",
          "min": 0.6,
          "typ": null,
          "max": null,
          "conditions": "Fast mode",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "HIGH Period of SCL Clock",
          "symbol": "tHIGH",
          "kind": "timing",
          "unit": "μs",
          "min": 4,
          "typ": null,
          "max": null,
          "conditions": "Standard mode",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Setup Time for a Repeated START Condition",
          "symbol": "tSU:STA",
          "kind": "timing",
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          "min": 0.6,
          "typ": null,
          "max": null,
          "conditions": "Fast mode",
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          "source": "datasheet"
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        {
          "name": "Setup Time for a Repeated START Condition",
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          "typ": null,
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          "conditions": "Standard mode",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Data Hold Time",
          "symbol": "tHD:DAT",
          "kind": "timing",
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          "max": 0.9,
          "conditions": "Fast mode; Notes 13, 14",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Data Hold Time",
          "symbol": "tHD:DAT",
          "kind": "timing",
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          "min": 0,
          "typ": null,
          "max": null,
          "conditions": "Standard mode; Notes 13, 14",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Data Setup Time",
          "symbol": "tSU:DAT",
          "kind": "timing",
          "unit": "ns",
          "min": 100,
          "typ": null,
          "max": null,
          "conditions": "Fast mode; Note 15",
          "source_page": 4,
          "source": "datasheet"
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        {
          "name": "Data Setup Time",
          "symbol": "tSU:DAT",
          "kind": "timing",
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          "min": 250,
          "typ": null,
          "max": null,
          "conditions": "Standard mode; Note 15",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Rise Time of Both SDA and SCL Signals",
          "symbol": "tR",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": null,
          "max": 300,
          "conditions": "Fast mode; Note 16",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Rise Time of Both SDA and SCL Signals",
          "symbol": "tR",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": null,
          "max": 1000,
          "conditions": "Standard mode; Note 16",
          "source_page": 4,
          "source": "datasheet"
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