X1G0054210205

{
  "schema_version": 1,
  "type": "component",
  "slug": "x1g0054210205",
  "title": "X1G0054210205",
  "brief": "Seiko Epson Temperature Compensated Crystal Oscillators (TCXO), SMD2520-4P. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
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  "component": {
    "mpn": "X1G0054210205",
    "manufacturer": "Seiko Epson",
    "package": "SMD2520-4P",
    "pin_count": 4,
    "category": "Crystals, Oscillators, Resonators",
    "subcategory": "Temperature Compensated Crystal Oscillators (TCXO)",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590908085055528960",
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    "distributor_links": {
      "lcsc": "C7527388"
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      "checked_at": "2026-10-17T15:27:39Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
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      "mouser": {
        "pn": null,
        "status": "quota"
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    "pins": [
      {
        "number": "1",
        "name": "N.C. (TCXO)",
        "type": "unconnected",
        "description": "For this TCXO variant (no VC function, ordering suffix ECGNNM) the pin is N.C.; keep it open or connect it to GND, and it does not work as a ground pin."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference (0.0 V) for VCC; the metal cap on top of the device is directly connected to this pin, so no conductor at non-ground potential may touch the cap."
      },
      {
        "number": "3",
        "name": "OUT",
        "type": "output",
        "description": "Clipped sine wave output into a 10 kΩ // 10 pF load (9 to 11 kΩ, 9 to 11 pF), with a minimum output level of 0.8 Vpp; an external DC-cut capacitor of at least 0.01 µF must be attached to this pin."
      },
      {
        "number": "4",
        "name": "VCC",
        "type": "power_in",
        "description": "Supply voltage of 1.7 V to 1.9 V for the 1.8 V variant (absolute maximum VCC-GND −0.5 V to +4.0 V), with a 0.01 µF to 0.1 µF bypass capacitor placed as close to the TCXO as possible between VCC and GND."
      }
    ],
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        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The datasheet lists pin 1 as 'N.C. (TCXO)' for the non-VC variant; the 'Vc (VC-TCXO)' function is no; The MPN given (X1G0054210205) lacks the 2-digit suffix defined in the datasheet (X1G0054210205xx). P"
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        "cost_usd": 0.071,
        "at": "2026-10-17T15:27:08"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590908085055528960",
        "pages": 18,
        "sha256": "9b6c75a800a76864",
        "source_tier": "lcsc"
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      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 4,
        "described": 4,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
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        "seat": "z = 0",
        "extents_mm": [
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "cd0c53e8a35a3cb36fc18e5248a2acf382b94b62d156b7bb9cc398eef3e21c4a",
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  "metadata": {
    "specs": {
      "Manufacturer": "Seiko Epson",
      "Package": "SMD2520-4P",
      "Category": "Crystals, Oscillators, Resonators",
      "Pins": "4"
    },
    "appearance": {
      "contacts": {
        "quote": "Terminal coating : Au plating capacitor(0.01 μF to 0.1 μF) between Vcc and GND. Please place it as close to TCXO as possible.",
        "page": 14,
        "doc": "ds.pdf",
        "plating": "gold"
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      "version": 1,
      "datasheet_sha256": "9b6c75a800a76864090cb2cbb05dd18be32186476337b8dd59c253d98c54f988"
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    "characteristics": {
      "version": 1,
      "source": "datasheet",
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      "rows": [
        {
          "name": "Supply voltage (Vcc)",
          "symbol": "VCC",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 1.7,
          "typ": 1.8,
          "max": 1.9,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Ground voltage",
          "symbol": "GND",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 0,
          "typ": null,
          "max": 0,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Operating temperature range",
          "symbol": "T_use",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 85,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Output load resistance",
          "symbol": "Load_R",
          "kind": "recommended_operating",
          "unit": "kΩ",
          "min": 9,
          "typ": 10,
          "max": 11,
          "conditions": "",
          "source_page": 1,
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        },
        {
          "name": "Output load capacitance",
          "symbol": "Load_C",
          "kind": "recommended_operating",
          "unit": "pF",
          "min": 9,
          "typ": 10,
          "max": 11,
          "conditions": "",
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          "source": "datasheet"
        },
        {
          "name": "DC-cut capacitor (external, not included in TCXO)",
          "symbol": "Cc",
          "kind": "recommended_operating",
          "unit": "μF",
          "min": 0.01,
          "typ": null,
          "max": null,
          "conditions": "DC-cut capacitor",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Frequency tolerance before reflow",
          "symbol": "f_tol",
          "kind": "tolerance",
          "unit": "x10⁻⁶",
          "min": -0.5,
          "typ": null,
          "max": 0.5,
          "conditions": "T_use = +25 °C ± 2 °C, before reflow",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Frequency tolerance after 2 reflows",
          "symbol": "f_tol",
          "kind": "tolerance",
          "unit": "x10⁻⁶",
          "min": -1.5,
          "typ": null,
          "max": 1.5,
          "conditions": "T_use = +25 °C ± 2 °C, after 2 reflows",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Frequency / temperature characteristics",
          "symbol": "fo-Tc",
          "kind": "temperature_coefficient",
          "unit": "x10⁻⁶",
          "min": -0.5,
          "typ": null,
          "max": 0.5,
          "conditions": "T_use = -40 °C to +85 °C (reference to +25 °C)",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Frequency / load coefficient",
          "symbol": "fo-Load",
          "kind": "electrical",
          "unit": "x10⁻⁶",
          "min": -0.1,
          "typ": null,
          "max": 0.1,
          "conditions": "Load ± 10 %",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Frequency / voltage coefficient",
          "symbol": "fo-Vcc",
          "kind": "voltage_coefficient",
          "unit": "x10⁻⁶",
          "min": -0.1,
          "typ": null,
          "max": 0.1,
          "conditions": "Vcc ± 5 % (within 1.7 V to 1.9 V operating range)",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Frequency aging, first year",
          "symbol": "f_age",
          "kind": "tolerance",
          "unit": "x10⁻⁶",
          "min": -0.5,
          "typ": null,
          "max": 0.5,
          "conditions": "T_use = +25 °C first year",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Frequency aging, 10 years",
          "symbol": "f_age",
          "kind": "tolerance",
          "unit": "x10⁻⁶",
          "min": -3.5,
          "typ": null,
          "max": 3.5,
          "conditions": "T_use = +25 °C 10 years",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Current consumption",
          "symbol": "Icc",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 1.8,
          "conditions": "Vcc = 1.8 V, GND = 0.0 V, Load = 10 kΩ // 10 pF, T_use = +25 °C",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Output level (peak to peak)",
          "symbol": "Vpp",
          "kind": "electrical",
          "unit": "V",
          "min": 0.8,
          "typ": null,
          "max": null,
          "conditions": "Peak to peak voltage",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Symmetry",
          "symbol": "SYM",
          "kind": "electrical",
          "unit": "%",
          "min": 45,
          "typ": 50,
          "max": 55,
          "conditions": "GND level (DC-cut)",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Start-up time to frequency",
          "symbol": "t_str",
          "kind": "timing",
          "unit": "ms",
          "min": null,
          "typ": null,
          "max": 2,
          "conditions": "Until frequency has been reached within ±0.5 x 10⁻⁶ of final frequency",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Start-up time to output amplitude",
          "symbol": "t_str",
          "kind": "timing",
          "unit": "ms",
          "min": null,
          "typ": null,
          "max": 1,
          "conditions": "Until output signal has been reached min 90 % of final amplitude",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Harmonics",
          "symbol": "",
          "kind": "electrical",
          "unit": "dBc",
          "min": null,
          "typ": null,
          "max": -5,
          "conditions": "3rd harmonics",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Supply voltage (VCC-GND)",
          "symbol": "VCC-GND",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.5,
          "typ": null,
          "max": 4,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Storage temperature range",
          "symbol": "T_stg",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 90,
          "conditions": "Storage as single product",
          "source_page": 4,
          "source": "datasheet"
        }
      ]
    }
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