component
X1G0054210205
Public Made by Adomby adom
Seiko Epson Temperature Compensated Crystal Oscillators (TCXO), SMD2520-4P. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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Contents
README
markdownX1G0054210205
Seiko Epson · Temperature Compensated Crystal Oscillators (TCXO) · SMD2520-4P
X1G0054210205 from Seiko Epson, in a SMD2520-4P. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | N.C. (TCXO) | unconnected | 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. |
| 2 | GND | power_in | 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. |
| 3 | OUT | output | 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. |
| 4 | VCC | power_in | 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. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Seiko Epson |
| Package | SMD2520-4P |
| Category | Crystals, Oscillators, Resonators |
| Pins | 4 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Supply voltage (Vcc) | VCC | 1.7 | 1.8 | 1.9 | V | 1 | |
| Ground voltage | GND | 0 | 0 | V | 1 | ||
| Operating temperature range | T_use | -40 | 85 | °C | 1 | ||
| Output load resistance | Load_R | 9 | 10 | 11 | kΩ | 1 | |
| Output load capacitance | Load_C | 9 | 10 | 11 | pF | 1 | |
| DC-cut capacitor (external, not included in TCXO) | Cc | 0.01 | μF | DC-cut capacitor | 1 | ||
| Frequency tolerance before reflow | f_tol | -0.5 | 0.5 | x10⁻⁶ | T_use = +25 °C ± 2 °C, before reflow | 1 | |
| Frequency tolerance after 2 reflows | f_tol | -1.5 | 1.5 | x10⁻⁶ | T_use = +25 °C ± 2 °C, after 2 reflows | 1 | |
| Frequency / temperature characteristics | fo-Tc | -0.5 | 0.5 | x10⁻⁶ | T_use = -40 °C to +85 °C (reference to +25 °C) | 1 | |
| Frequency / load coefficient | fo-Load | -0.1 | 0.1 | x10⁻⁶ | Load ± 10 % | 1 | |
| Frequency / voltage coefficient | fo-Vcc | -0.1 | 0.1 | x10⁻⁶ | Vcc ± 5 % (within 1.7 V to 1.9 V operating range) | 1 | |
| Frequency aging, first year | f_age | -0.5 | 0.5 | x10⁻⁶ | T_use = +25 °C first year | 1 | |
| Frequency aging, 10 years | f_age | -3.5 | 3.5 | x10⁻⁶ | T_use = +25 °C 10 years | 1 | |
| Current consumption | Icc | 1.8 | mA | Vcc = 1.8 V, GND = 0.0 V, Load = 10 kΩ // 10 pF, T_use = +25 °C | 1 | ||
| Output level (peak to peak) | Vpp | 0.8 | V | Peak to peak voltage | 1 | ||
| Symmetry | SYM | 45 | 50 | 55 | % | GND level (DC-cut) | 1 |
| Start-up time to frequency | t_str | 2 | ms | Until frequency has been reached within ±0.5 x 10⁻⁶ of final frequency | 1 | ||
| Start-up time to output amplitude | t_str | 1 | ms | Until output signal has been reached min 90 % of final amplitude | 1 | ||
| Harmonics | -5 | dBc | 3rd harmonics | 1 | |||
| Supply voltage (VCC-GND) | VCC-GND | -0.5 | 4 | V | 4 | ||
| Storage temperature range | T_stg | -40 | 90 | °C | Storage as single product | 4 |
Materials and finish
As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).
| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | gold | 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. | 14 |
CAD (KiCad official)
- Symbol:
X1G0054210205 - Footprint:
Crystal:Crystal_SMD_2520-4Pin_2.5x2.0mm - 3D model: SMD2520-4P (KiCad packages3D, STEP)
- 3D model files:
x1g0054210205-etched.step/x1g0054210205-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);x1g0054210205.step/x1g0054210205.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Seiko Epson datasheet (18 pp, sha256
9b6c75a800a76864, retrieved 2026-10-17, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-sonnet-5-5(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).