|Our crystal products are designed so they may withstand the same standard
reflow soldering temperatures as most other electronics components. However,
if the reflow temperature is higher than our specification allows, the
crystals' performance may be affected. Avoid soldering the product at temperatures
higher than specified.
For the reflow temperature profile of SMD products, refer to Reflow Temperature Profile.
General cleaning solutions or ultrasonic cleaning may be used to clean our crystal products, but verification tests are recommended prior to use.
Tuning fork crystals resonate at frequency bands that are close to the washing frequency of ultrasonic cleaning machines and this may cause resonance deterioration in the crystal. Therefore the use of ultrasonic cleaning machines to clean tuning fork crystals should be avoided. After applying ultrasonic cleaning, the functionality of crystals should be verified by testing the performance of the end product.
|Crystal products are designed to resist shock, but if the products receive excessive shocks or are dropped on the ground, be sure to check for any damages before using.|
<SMD crystal products>
|Storing crystal products at high temperatures or high humidity may deteriorate the soldering condition of pins. Do not store in direct sunlight or damp environments.|
Negative resistance determines the tolerance margin of a circuit that oscillates the resonator. We recommend that the negative resistance be at least five times the standard series resistance for standard applications, and at least ten times the standard series resistance for automotive and safety applications.
Some crystal oscillators do not have internally connected bypass capacitors. When using the product, use a condenser with a good high frequency characteristic of 0.01 μ F between Vdd and GND(e.g.Ceramic chip capacitor)and connect it at the shortest possible distance. For details, refer to the specifications of each individual product.
<Monolithic Crystal Filters>
If the floating capacity of a PCB(on which a crystal filter is to be mounted)is too large, circuit tuning may be required to cancel out the excess floating capacity.
When excessive voltage is applied to crystal filters, their performance may be affected or the crystal blank may be damaged. When handling the product, use at its input level equal to or less than -10dBm.
<Optical Quartz Products>
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