Abracon | ClearClock® Third Overtone Crystal Oscillators
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ClearClock® Third Overtone XOs

AK2, AX3, AK5 & AK7 ClearClock® Series

The optimal convergence in power optimization, miniature size and <80fs jitter performance

Abracon's new AK2, AX3, AK5 & AK7 ClearClock® XO series are designed to meet the needs of compact applications such as optical modules, active cables, and small networking and storage gear, while maintaining the world’s highest data rates in excess of 10Gbps and up to 100/400Gbps.

This next generation of ClearClock® is ideal for applications requiring carrier frequencies in the 100MHz to 200MHz range. Most network processors and advanced CPUs require ultra-low jitter for connectivity greater than 10Gigabits per second and up to 100Gbps. The AK2, AX3, AK5 and AK7 devices utilize a quieter third overtone architecture that avoids phase locked loop (PLL) based multiplication, reducing overall power consumption far below other high-performance XO alternatives.

The third overtone ClearClock® solutions provide the best combination of ultra-low sub-100fs jitter performance in a miniature footprint. Typically consuming 30mW of power at the lowest operating voltage of 1.8V, the third-overtone ClearClock® devices deliver industry-leading low power consumption for low noise differential oscillators.

Read Abracon's third overtone application note.

ClearClock® Series Jitter Package Size Datasheet Inventory
AK2 <120fs typ. RMS 2.5 x 2.0 x 1.0 mm AK2 ClearClock™ Datasheet AK2 Inventory
AX3 <80fs typ. RMS 3.2 x 2.5 x 1.0 mm AX3 ClearClock™ Datasheet AX3 Inventory
AK5 70fs typ. RMS 5.0 x 3.2 x 1.3 mm AK5 ClearClock™ Datasheet AK5 Inventory
AK7 75fs typ. RMS 7.0 x 5.0 x 1.8 mm AK7 ClearClock™ Datasheet AK7 Inventory

Ultra-Low Jitter For the World's Highest Data Rates

Product Information



  • PCI Express
  • 10G/40G/100G optical Ethernet
  • Networking and Communications
  • Optical Modules
  • RF Systems
  • BTS / Base stations
  • Test and Measurement
  • Data Center


<80fs Typ. (150fs Max @ 156.25MHz)

Available in industry standard frequencies: 100MHz to 212.5MHz

Lowest in-class Power Consumption 16mA Typ. LVDS @ 156.25MHz

±25ppm stability: Over industrial operating temperature (-40 to +85ºC)

3.3V, 2.5V, 1.8V supply voltage options

Supports LVPECL, LVDS, HCSL differential outputs

Industry Standard Miniature Footprints

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