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

ILSI America MMD Oscilent

E1WC Series Crystal
Watch Crystal Resonator 2.1mm x 6.2mm Thru-Hole Metal Cylindrical

Revision  B  04/13/2015

Electrical Specifications

Nominal Frequency 32.768kHz
Frequency Tolerance ±20ppm at 25°C
Frequency Stability Temperature Coefficient -0.034ppm ±0.006ppm/(Change in °C)2 Maximum
Turn over Temperature 25°C ±5°C
Aging at 25°C ±3ppm/year Maximum
Operating Temperature Range -10°C to +60°C
-20°C to +70°C
Load Capacitance 6.0pF Parallel Resonant
12.5pF Parallel Resonant
Shunt Capacitance 2.0pF Maximum
Motional Capacitance 3.0fF Typical
Equivalent Series Resistance 35,000 Ohms Maximum
Mode of Operation Fundamental
Drive Level 1µWatt Maximum
Crystal Cut Tuning Fork
Storage Temperature Range -40°C to +85°C
Insulation Resistance Measured at 100VDC
500 Megaohms Minimum