Q24FA20H00491

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  "title": "Q24FA20H00491",
  "brief": "Seiko Epson Crystals, SMD2520-4P. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
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    "mpn": "Q24FA20H00491",
    "manufacturer": "Seiko Epson",
    "package": "SMD2520-4P",
    "pin_count": 4,
    "category": "Crystals/Oscillators/Resonators",
    "subcategory": "Crystals",
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        "status": "quota"
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        "name": "Xtal",
        "type": "passive",
        "description": "Crystal terminal (Xtal); isolation resistance of 500 MΩ min. at DC 100 V is specified between terminal #1 and terminal #3."
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      {
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        "name": "GND",
        "type": "power_in",
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      {
        "number": "3",
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      {
        "number": "4",
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        "at": "2026-10-22T18:51:00"
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        "described": 4,
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        "centre_offset_mm": 0,
        "footprint_binding": "identity",
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  "metadata": {
    "specs": {
      "Manufacturer": "Seiko Epson",
      "Package": "SMD2520-4P",
      "Category": "Crystals/Oscillators/Resonators",
      "Pins": "4"
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    "appearance": {
      "contacts": {
        "quote": "Terminal #2、#4：GND Terminal treatment ：Au plate",
        "page": 5,
        "doc": "ds.pdf",
        "plating": "gold"
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      "rows": [
        {
          "name": "Storage temperature range",
          "symbol": "T_stg",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 125,
          "conditions": "Depends on the Environmental characteristics specifications",
          "source_page": 3,
          "source": "datasheet"
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        {
          "name": "Operating temperature range",
          "symbol": "T_use",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 85,
          "conditions": "",
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        },
        {
          "name": "Level of drive",
          "symbol": "DL",
          "kind": "recommended_operating",
          "unit": "µW",
          "min": null,
          "typ": null,
          "max": 200,
          "conditions": "Recommended : 100 µW",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Frequency tolerance",
          "symbol": "f_tol",
          "kind": "tolerance",
          "unit": "× 10-6",
          "min": -10,
          "typ": null,
          "max": 10,
          "conditions": "CL = 10pF, Ta = +25 ±3°C, DL = 100 μW, Not include aging",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Motional resistance",
          "symbol": "R1",
          "kind": "electrical",
          "unit": "Ω",
          "min": null,
          "typ": null,
          "max": 48,
          "conditions": "π circuit IEC 60444-2, Ta = Operating temperature range, DL = 100 μW",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Shunt capacitance",
          "symbol": "C0",
          "kind": "electrical",
          "unit": "pF",
          "min": null,
          "typ": null,
          "max": 2,
          "conditions": "π circuit and N.A.",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Frequency temperature characteristics",
          "symbol": "f_tem",
          "kind": "temperature_coefficient",
          "unit": "× 10-6",
          "min": -20,
          "typ": null,
          "max": 20,
          "conditions": "Ta = Operating temperature range (Ref. at Ta = +25 °C ±3 °C), DL = 100 μW",
          "source_page": 3,
          "source": "datasheet"
        },
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          "name": "Isolation resistance",
          "symbol": "IR",
          "kind": "electrical",
          "unit": "MΩ",
          "min": 500,
          "typ": null,
          "max": null,
          "conditions": "DC 100 V±15, 60 seconds, Between terminal # 1 and terminal # 3",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Frequency aging",
          "symbol": "f_age",
          "kind": "electrical",
          "unit": "× 10-6/year",
          "min": -1,
          "typ": null,
          "max": 1,
          "conditions": "12 < f_nom ≤ 40 MHz, Ta = +25 °C ±3 °C",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Nominal frequency",
          "symbol": "f_nom",
          "kind": "electrical",
          "unit": "MHz",
          "min": null,
          "typ": 24,
          "max": null,
          "conditions": "Fundamental",
          "source_page": 3,
          "source": "datasheet"
        }
      ]
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