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

ILSI America MMD Oscilent

E4WS Series Crystal
Watch Crystal Resonator 1.0mm x 1.6mm x 0.5mm 2 Pad Ceramic Surface Mount (SMD)

Revision  A  01/23/2017

Electrical Specifications

Nominal Frequency 32.768kHz
Frequency Tolerance ±20ppm at 25°C
Frequency Stability Temperature Coefficient -0.04ppm/(Change in °C)2 Maximum
Turn over Temperature 25°C ±5°C
Operating Temperature Range -40°C to +85°C
Load Capacitance 9pF Parallel Resonant
12.5pF Parallel Resonant
Shunt Capacitance(C0) 1.2pF Typical, 1.5pF Maximum
Equivalent Series Resistance 90,000 Ohms Maximum
Mode of Operation Fundamental
Crystal Cut Tuning Fork
Drive Level 1µWatt Maximum
Aging (at 25°C) ±3ppm/year Maximum
Storage Temperature Range -55°C to +125°C
Insulation Resistance Measured at 100VDC
500 Megaohms Minimum