The programmable NX Crystal Oscillator XO series incorporates a miniature AT-cut crystal resonator and highly flexible oscillator IC into standard 7.0 x 5.0 mm and 5.0 x 3.2, 3.2x2.5, and 2.5x2.0 mm ceramic packages.
Designed and tested to target high-frequency and low-jitter applications such as networking, storage, video, and other embedded applications, the programmable oscillator IC contains a very low jitter PLL and can therefore generate any frequency based on your needs. The flexibility of the oscillator IC also enables multiple output frequencies for these XO families. The dual and quad frequency options are available for each package size, thus providing options for supporting platform designs with easy configurable solutions.
Combining high performance and flexibility, our NX Crystal Oscillator families provide high-frequency outputs with jitter performance as low as 0.3ps (RMS). Not only are our NX clocks perfect for networking and telecom applications, but they are also great for applications that demand high-performance clock sources.
Parameter used to define the maximum deviation of the actual frequency from the specified nominal frequency over changes in operating conditions. Oscillator stability is usually rated as inclusive of temperature, load, initial calibration, supply, and aging effects.
Not all obsolete parts will have a direct replacement. However, we recommended that you contact your regional sales office.
Jitter can be cause by: poor decoupling to the Vcc and GND, signal source with heavy jitter, slow edge rate which will provide additional time to introduce jitter to the signal. Additional information can be found in Application Note 24: Designing for Minimal Jitter when using Clock Buffers
There are several types of jitter, but the main ones are: cycle-to-cycle jitter, period jitter, half period jitter, and peak-to-peak jitter. Jitter terminology can be found in AB36: Jitter Measurement Techniques at Application Brief No. 36 or Application Note No. 27.
Cycle-to-cycle jitter is the difference in the clock's period between two consecutive cycles and is expressed in units of + pico-seconds. This is because it can be either leading or lagging from the ideal output waveform.
Half-Period Jitter is the measure of maximum change in a clock's output transition from its ideal position during one-half period. It is measured as: tjit(half-period) = thalf-period n – 1/2 ƒo, where ƒo is the frequency of the input signal.
HiFlex® XO is programmable frequency synthesis crystal oscillator family. It has very short lead time for any frequency design need,even in flexible quantity. They are specially good for Telecom, Datacom, Ethernet, and SDRAM controller low jitter reference clock designs. HiFlex XO Finder
Measurement of the deviation of a clock period from its ideal position as calculated with respect to the average operating frequency under a fixed set of operating conditions.
Part per million is used to measure the deviation of the output signal (+/-20 ppM = +/-0.002%).
All Pericom's products that are not lead-free are composed of 85% Sn and 15% Pb. For lead-free products, they are composed of 100% matte Sn. Lead-free products are marked and ordered with the letter "E" suffix at the end of the part number.
FIT and MTBF data can be found at Pericom's Quality webpage.
Lead (Pb)-Free and Green information can be found on individual datasheets or Pb-Free & Green Page.