ASSP Crystal Oscillator (XO)
Application Specific Standards Product Crystal Oscillator or ASSP XO, a collection of Pericom's most popular XOs tailored for specific applications. With Pericom’s 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
Pericom innovative XOs provide low jitter and low power performance specifically tailored to, and proven in, your application. Innovative designers around the world have specified Pericom XO products for designing their high-performance servers, digital media, storage, ultra mobility, security systems and more. ASSP XO lets you leverage Pericom's technical application experience in delivering application tailored solutions to our broad customer base.
ASSP XO Details
Crystal Oscillators Portfollio: XO, VCXO and Real-Time Clocks
- Output frequencies up to 670 MHz with ±20 ppm total lifetime accuracy available
- 5 V, 3.3 V, 2.5 V, and 1.8 V products available
- Patented XP Technology for cost-effective high-frequency, low-jitter clock circuits
- VCXO control voltage function for synchronizing with another clock or data signal
- Low power consumption as low as 2.0 mA
- Lowest jitter less than 0.5 ps for high-speed applications
ASSP XO FAQs
- Define Stability?
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.
- External links to some of the ASSPXO/VCXO datasheets are missing, where can I go to access them?
Please go to the Media & Downloads page. From there please click on the tab called "FCP Support Documents".
In that section, you should be able to access all the links related to each product, in terms of reflow, test circuits and tape and reel information. We apologise for the inconvenience.
- How do I know if a device has been obsoleted? I am unable of find the datasheet on the Pericom website.
If the datasheet is not found on Pericom's website, it is a strong indication that the part has been obsoleted. there are several ways to find out. The first method would be to check on the Product Detail page for your particular product choice, if there are related PDN notices, they will show up on the tab, marked "PDNS".
Alternatively go Discontinuation Notices to search for the part number.
- Is there a replacement for an obsolete part?
Not all obsolete parts will have a direct replacement. However, we recommended that you contact your regional sales office.
- What are the causes of jitter?
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
- What are the types of jitter?
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.
- What is cycle-to-cycle jitter?
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.
- What is half-period jitter?
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.
- What is Jitter?
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.
- What is PPM?
Part per million is used to measure the deviation of the output signal (+/-20 ppM = +/-0.002%).
- What is the lead finish for Pericom products? What about lead-free?
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.
- What is XO or SO?
- Where can I find Mean Time Before Failure (MTBF) or Failures In Time (FIT) values for Pericom products?
FIT and MTBF data can be found at Pericom's Quality webpage.
- Where can I find the information on your Pb-free and "Green" packaging?
Lead (Pb)-Free and Green information can be found on individual datasheets or Pb-Free & Green Page.
- Why is the marking on the FCT devices different from the datasheet?