Silicon clock can outperform quartz, claims supplier

ON Semiconductor has added to its range of silicon-based crystal oscillator clocks modules with dual voltage capabilities and frequency stability as low as ±20 parts per million (ppm).

The devices are designed to provide clock signals in 2.5V/3.3V low-voltage positive emitter coupled logic (LVPECL) designs in comms switches and basestations.
 
They offer frequencies for SONET, Gigabit Ethernet, and LAN/WLAN. 

Designated the NBX series, the silicon clocks are designed to match the performance of quartz-based third overtone or surface acoustic wave products. Phase noise is specified at -160dB relative to the carrier per hertz (dBc/Hz), typical RMS phase jitter of 0.5ps.

“This frequency and voltage range expansion gives designers of LVPECL clock tree designs even greater choice,” said Ryan Cameron, director, custom industrial and timing products business unit at ON Semiconductor.

New frequencies supported are 622.08 megahertz (MHz) for the NBXMBB024 and NBXSBB024; 156.25 MHz for the NBXHGA017; 125.00 MHz for the NBXHGA019; 161.1328 MHz for the NBXSGA008; and 50.00 MHz for the NBXHGA053

"With improved performance, dual voltage flexibility and reduced lead times compared to quartz-based alternatives, the NBX series is keeping ahead of the increasing demands of applications in this sector,” said Cameron.

The modules are packaged in RoHS compliant, hermetically sealed 5.0 mm x 7.0 mm x 1.9 mm ceramic CLCC-6 SMD packages