Diodes Incorporated
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JX321 (Obsolete)

Programmable XO (Not Recommended for New Design)

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Product Description

The JX321 XO series is a high performance CMS crystal oscillator family with very low jitter performance. It supports various options including wider frequency range, 2.5V/3.3V voltage, and various stabilities. It is designed to meet the clock source specifications for communication systems, and other high performance equipment


  • Very low phase jitter - 0.8 RMS typical
  • Thicker crystal for improved reliability
  • Low supply current - 45mA max.
  • Industrial Temperature Rnage
  • Pb-free & RoHS compliant
  • Fast lead time


  • Networking systems
  • Servers and storage systems
  • Profession video equipments
  • Test and measurement
  • FPGA/ASIC clock generation

Product Specifications

Product Parameters

Family HiFlexXO
Freq Range (MHz) 10 to 212.5
Additive Jitter (ps) 0.8 ps RMS
Output Logic CMOS
Package Size (mm) 3.2 x 2.5 x 1.0
Pads 4
PkgType Ceramic Seam
Product Series JX3
Supply Voltage (V) 3.3, 2.5

Technical Documents

Recommended Soldering Techniques



JX321 FAQs

What is FCP XO product?

FCP is Frequency Control Product. They include crystals, crystal oscillators (XO), voltage control oscillators (VCXO), and TCXO. XO has IC and crystal integrated together as a component for quality easy use in system designs. For more product information, please visit company website: https://www.diodes.com/products/connectivity-and-timing/crystal-and-crystal-oscillator/