Frequency control specialist, Euroquartz has launched a new range of switchable crystal oscillators offering users the ability to provide four different frequencies. The new QuikXO HC_JF series oscillators are available in frequencies from 15 to 2100MHz with a choice of outputs including LVCMOS (up to 250MHz), LVPECL, LVDS and CML differential. High current steering logic (HCSL) differential outputs are available for frequencies up to 700MHz. Integrated phase jitter performance of 150fs maximum makes these crystal oscillators particularly suitable for high frequency applications.
QuikXO HC_JF series crystal oscillators are available at low cost and can be delivered in days for prototypes with a choice of supply voltages – 1.8, 2.5 or 3.3V – across the range apart from LVPECL with 2.5 and 3.3V only. Customers can select any four frequencies in the range and the oscillator can switch to each as required, useful in frequency bus distribution applications on multi-processor boards where several frequencies are required for the different processors. The four chosen frequencies can all be synchronised from the single crystal oscillator instead of trying to sequence multiple clocks to achieve switching in of the various processors.
Frequency selection is made using two logic control pads FS0 and FS1 to provide the four user selectable frequencies with frequency select timing of 2.5ms maximum. Frequency stability specifications of ±25, ±50 and ±100ppm over both commercial (-10 to +70°C) and industrial (-40 to +85°C) temperature ranges are available as standard.
Other specifications include maximum ageing of ±3ppm in first year, duty cycle of 50%±5%, rise times of 0.35ns maximum and current consumption from 62 to 99mA typical depending on output logic selected. Additional features include start-up time of 5ms typical, 10ms maximum and output enable/disable functions.
RoHS compliant, the new QuikXO HC_JF crystal oscillators are housed in industry standard 8-pad, 7 x 5mm surface mount packages capable of withstanding 260°C for 10 seconds, twice. Storage temperature range is -55 to +155°C.
Euroquartz is an independent UK-based manufacturer and supplier of quartz crystals, oscillators, filters and frequency-related products to the electronics manufacturing industry worldwide. The company is AS9100 registered and designs and manufactures a comprehensive range of frequency control components for a wide range of customers including major OEMs covering a broad spectrum of applications including military and aerospace, communications, general electronics, computing, control systems and petrochemical among many others. For more information, visit www.euroquartz.co.uk.