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X1E0000210621

Seiko Epson · Crystals · SMD3225-4P

X1E0000210621 from Seiko Epson, in a SMD3225-4P. 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 XTAL1 passive Crystal terminal connected to the internal resonator (TSX-3225, 16.000 MHz to 48.000 MHz, CL 7 pF to infinity).
2 GND power_in Connected to the metal case (lid); the datasheet says to connect #2 and #4 to ground.
3 XTAL2 passive Crystal terminal connected to the internal resonator (TSX-3225, drive level 200 µW Max., recommended 1 µW to 100 µW).
4 GND power_in Connected to the metal case (lid); the datasheet says to connect #2 and #4 to ground.

Key specifications

Parameter Value
Manufacturer Seiko Epson
Package SMD3225-4P
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
Nominal frequency range (TSX-3225 column) f_nom 16 48 MHz TSX-3225 column 1
Frequency tolerance (standard) f_tol -50 50 × 10-6 Standard; ±15 to ±50 × 10-6 available 1
Frequency tolerance at +25 °C f_tol -10 10 × 10-6 +25 °C 1
Frequency-temperature stability f_tem -30 30 × 10-6 -20 °C to +70 °C 1
Frequency-temperature stability f_tem -10 10 × 10-6 -20 °C to +75 °C 1
Aging per year f_age -5 5 × 10-6 / year 1
Aging per year, first year f_age -1 1 × 10-6 / year +25 °C, 1st year 1
Equivalent series resistance (16.0 to 21.0 MHz) R1 60 Ω 16.0 MHz ≤ f_nom < 21.0 MHz; -40 °C to +85 °C, DL = 100 µW 1
Equivalent series resistance (21.0 to 48.0 MHz) R1 40 Ω 21.0 MHz ≤ f_nom ≤ 48.0 MHz; -40 °C to +85 °C, DL = 100 µW 1
Drive level DL 200 µW 1
Drive level range DL 1 100 µW 1
Load capacitance CL 7 pF 1
Operating temperature T_use -40 85 °C Above +85 °C (printed +105 °C) only on request 1
Storage temperature T_stg -40 125 °C 1

CAD (KiCad official)

  • Symbol: X1E0000210621
  • Footprint: Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm
  • 3D model: SMD3225-4P (KiCad packages3D, STEP)
  • 3D model files: x1e0000210621-etched.step / x1e0000210621-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); x1e0000210621.step / x1e0000210621.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Seiko Epson datasheet (2 pp, sha256 4e9c0baa33e30d2d, retrieved 2026-10-15, tier: lcsc)
  • Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text+vision), consensus claude-opus-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).

Datasheet PDF