New clock oscillators offer tight frequency stability

Euroquartz has launched a new range of clock oscillators from Statek offering tight frequency stability of ±20ppm over the military temperature range and ±10ppm for industrial applications. Available in frequencies from 10MHz to 55MHz, the new STXO range also offers low RMS jitter and low phase noise. State-of-the-art design, process, manufacturing and test capabilities have made the development of this ultra-miniature 3.2mm x 2.5mm STXO oscillator possible. Key performance capabilities include low RMS jitter typically less than 300fs, typical noise floor less than -161dBc/Hz, high shock survival options (>20,000g) and ultra-low Allan Deviation and period jitter (1.4ps RMS). Supply voltage options are 2.5V and 3.3V ±10% with low current consumption of 3mA (no load across temperature range). Offering 15pF CMOS output load with enable/disable and tri-state functions, the new range delivers fundamental frequency output with no PLL artefacts and is housed in a hermetically-sealed ceramic four-pad surface mount package. The new clock oscillators are offered in versions for industrial applications over -10C to +85C and military applications over -55C to +125C, and available with full defence testing per MIL PRF 55310 on request. Tighter frequency stability performance can also be provided to special order. Additional specifications include start-up time of 5ms maximum, rise/fall time of 5ns maximum, duty cycle of 45% minimum/55% maximum and low ageing of 2ppm in first year. Defence and aerospace applications include smart munitions, communications, guidance and navigation.