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Diodes Pericom: A product line of Diodes Incorporated

ASSP 石英晶体振荡器 (XO)


Diodes 的特殊应用石英晶体振荡器或称为 ASSP XO,是专为特定产品应用量身订制且最受欢迎 XO 的系列产品。Diodes 的 ASSP XO 解决方案目前包含电压控制石英晶体振荡器 (VCXO),以及串接标准专用的特殊应用参考时钟,让您在设计中选择及采用石英晶体时,不必再面临效能及交付时间需择其一的问题。现在,您的产品应用可以获得最佳效能效能及通过认证的技术,同时还能快速交付。


Diodes 的创新 XO 提供低抖动及低功耗效能,是专为您的产品应用量身订制且通过认证的产品。全球的创新设计师在设计高效能服务器、数字媒体、储存、手持及安全系统等产品时,皆指定采用 Diodes XO 产品。ASSP XO 让您利用 Diodes 的技术应用经验,为广大的客户交付针对产品应用量身订制的解决方案。

请参阅 Diodes 的 ASSP XO/VCXO 手册

下载 Diodes 完整的新型频率产品手册

ASSP 石英晶体振荡器 (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 石英晶体振荡器 (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 apologize for the inconvenience.

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?

A crystal (or SAW) oscillator outputs a precise fixed-frequency clock signal at a specified nominal value, used for data and processor timing.

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?

Sometimes the speed grades and the package nomenclature for our FCT devices may be swapped around. Full explanation for nomenclature information can be found under Packaging Support Documentation.