Application Specific Standards Product Crystal Oscillator or ASSP XO, a collection of Diodes Incorporated most popular XOs tailored for specific applications. With Diodes Incorporated ASSP XO solutions, which now includes voltage controlled crystal oscillators (VCXO), application specific reference clock for popular serial connectivity standard, and break free from critical trade-offs between performance and delivery times when selecting and qualifying oscillators in your designs. Now you can have physical performance, proven technology specific to your application, and fast delivery.
Proven Technology To Go
Diodes Incorporated innovative XOs provide low jitter and low power performance specifically tailored to, and proven in, your application. Innovative designers around the world have specified Diodes Incorporated XO products for designing their high-performance servers, digital media, storage, ultra mobility, security systems and more. ASSP XO lets you leverage Diodes Incorporated technical application experience in delivering application tailored solutions to our broad customer base.
Crystal Oscillators Portfollio: XO, VCXO and Real-Time Clocks
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.
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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.
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.