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Diodes Pericom: A product line of Diodes Incorporated

可编程晶体振荡器 (XO)

可编程 (HiFlex) 晶体振荡器 XO 系列产品,在标准 7.0 x 5.0 mm 和 5.0 x 3.2 mm 陶瓷封装内并入了微型 AT 裁切石英晶体谐振器及具高度弹性的振荡器 IC。可编程振荡器 IC 内含极低抖动的 PLL,因此可依需求产生任何频率,专门针对网络、储存、视讯和其他嵌入式产品应用等高频率及低抖动的产品应用而设计并测试。

Diodes Incorporated 的 HiFlex 时钟发生器兼具高效能及弹性,可提供 0.4 ps (RMS) 超低抖动效能的高频率输出。Diodes Incorporated 的 HiFlex 频率不仅适用于网络及电信产品应用,对于需要高效能频率产生器之产品应用,更是最佳选择。或者,您也能选用特别针对您需求而设计的工具,制作自己的 HiFlex XO 零件。试试「制作可编程 XO 零件」工具。


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可编程晶体振荡器 (XO) Details

Features

  • CMOS: 10 to 212.5 MHz
  • LVPECL: 10 to 360 MHz (other high frequencies available upon request)
  • Low phase noise jitter: < 0.8ps (typ)
  • Fast rise/fall time for LVPECL: 350ps (max)
  • High precision and tight frequency stability
  • ±25 ppm to ±50 ppm
  • Industry-standard 7.0 x 5.0 mm and 5.0 x 3.2 mm packages
  • Pb-Free and RoHS/Green compliant
  • Temperature range: -20 ~ +70 ℃; -40 ~ +85 ℃
  • Available on tape & reel

Applications

  • Networking
  • Storage
  • Video
  • PON
  • Other embedded applications

可编程晶体振荡器 (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.

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 HiFlex XO?

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

 

 

 

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.