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

ILSI America MMD Oscilent

EA1012 Series Crystal
Quartz Crystal Resonator 1.0mm x 1.2mm x 0.33mm 4 Pad Ceramic Surface Mount (SMD)

Revision  A  07/24/2017

Electrical Specifications

Nominal Frequency 36.000MHz to 52.000MHz
Some frequencies within this range may not be available.
Frequency Tolerance (at 25°C) ±30ppm Maximum
±15ppm Maximum
±10ppm Maximum
Frequency Stability
(over Operating Temperature Range)
±50ppm Maximum
±30ppm Maximum
±20ppm Maximum
±15ppm Maximum
±10ppm Maximum
Operating Temperature Range -10°C to +60°C
-20°C to +70°C
-30°C to +85°C
-40°C to +85°C
Load Capacitance 6pF to 10pF Parallel Resonant
Series Resonant
Equivalent Series Resistance 80 Ohms Maximum over Nominal Frequency of 36MHz to 37.999999MHz
60 Ohms Maximum over Nominal Frequency of 38MHz to 52MHz
Shunt Capacitance 5pF Maximum
Mode of Operation AT-Cut Fundamental
Crystal Cut AT-Cut
Storage Temperature Range -40°C to +85°C
Drive Level 100µWatts Maximum
Spurious Response Measured from Fo to Fo +5000ppm
-3dB Minimum
Aging at 25°C ±3ppm/year Maximum
Insulation Resistance Measured at 100VDC
500 Megaohms Minimum