Abracon | ClearClock™ Low Jitter XO Solutions


The ClearClock family of oscillators supports the next generation of bandwidth requirements for communications, cloud computing, storage, and RF applications. These oscillators lead the industry in low power consumption while maintaining typical jitter as low as 80fs. They also deliver phase noise performances that FPGAs and ICs require for serial data rates beyond 56Gbps. The ClearClock™ family includes phase locked loop and third overtone solutions offered in compact package sizes as small as 2.5 x 2.0 mm.

PLL-Based ClearClock Solutions

The AX7 series is optimized for superior rms jitter performance (119 typ), while consuming 130mW. The AX7 features the widest factory configurable frequency range from 50MHz to 2.1GHz in its performance class.

The AX5 series is available in a smaller 5 x 3.2 mm footprint for next generation networking and RF applications. This series leads the industry in low power consumption while maintaining typical jitter of 125fs, ideal for clocking serial data links beyond 56Gbps.

Third Overtone ClearClock Solutions

Typically consuming 30mW of power at the lowest operating voltage of 1.8V, the new AK2, AX3, AK5 and AK7 series deliver industry-leading low power consumption for low noise differential oscillators. The devices' simplified third overtone architecture avoids phase locked loop (PLL) based multiplication, reducing overall power consumption far below other high performance XO alternatives.

Check Out Our ClearClock for the Future of PCIe Whitepaper


  • 119fs Jitter Typical (F=322.265625MHz)
  • 150fs Jitter MAX (F>200MHz)
  • <80fs Typ (150fs Max @ 156.25MHz)
  • Widest in-class Frequency Range Offering from 50MHz to 2.1GHz
  • Lowest in-class Power Consumption
  • Supports LVPECL, LVDS, HCSL, CML Output Logic Type
  • Industry Standard Miniature Footprint


  • RF Systems
  • High Speed SERDES up to 56Gbps
  • High Performance Computing (HPC)
  • Network Processors
  • PCI Express
  • BTS / Basestations
  • Optical Modules
  • Test and Measurement
  • FPGA / Processors
  • 100/400Gb Ethernet
  • Server, Storage, Fibre Channel
  • Networking and Communications
  • Backplane/Chip to Chip Buses

Download ClearClock™ Crystal Oscillators Product Guide


Series Name Solution Type Jitter Package Size Abracon In-Stock
AX7 PLL-based Solution 119fs typ. RMS 7.0 x 5.0 x 1.8 mm Check Inventory
AX5 PLL-based Solution 125fs typ. RMS 5.0 x 3.2 x 1.4 mm Check Inventory
AX3 Third Overtone Solution <80fs typ RMS 3.2 x 2.5 x 1.0 mm Check Inventory
AK2 Third Overtone Solution <120fs typ. RMS 2.5 x 2.0 x 1.0 mm Check Inventory
AK5 Third Overtone Solution 70fs typ. RMS 5.0 x 3.2 x 1.3 mm Check Inventory
AK7 Third Overtone Solution 75fs typ. RMS 7.0 x 5.0 x 1.8 mm Check Inventory

Contact your local Abracon representative for additional information.


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