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Ecliptek is one of the ILSI America brands, which also include:

ILSI America MMD Oscilent

EA2540 Series Crystal
Quartz Crystal Resonator 2.5mm x 4.0mm x 0.7mm 4 Pad Ceramic Surface Mount (SMD)

Revision  A  12/05/2014

Electrical Specifications

Nominal Frequency 12.000MHz to 50.000MHz
Some frequencies within this range may not be available.
Frequency Tolerance (at 25°C) ±50ppm Maximum
±30ppm Maximum
±15ppm Maximum
±10ppm Maximum
Frequency Stability
(over Operating Temperature Range)
±100ppm Maximum
±50ppm Maximum
±30ppm Maximum
±20ppm Maximum
±15ppm Maximum
Operating Temperature Range 0°C to +70°C
-20°C to +70°C
-40°C to +85°C
Aging at 25°C ±3ppm/year Maximum
Load Capacitance 8pF Parallel Resonant to 32pF Parallel Resonant
Series Resonant
Shunt Capacitance 5pF Maximum
Equivalent Series Resistance Click to Open ESR Table
Mode of Operation AT-Cut Fundamental
Drive Level 100µWatts Maximum
Spurious Response Measured from Fo to Fo +5000ppm
-3dB Minimum
Storage Temperature Range -40°C to +90°C
Insulation Resistance Measured at 100VDC
500 Megaohms Minimum