Surface mount miniature oven-controlled crystal oscillators for high stability applications

Euroquartz has launched a new range of surface mount miniature oven-controlled crystal oscillators (OCXO) providing excellent frequency stability from a quartz IT cut crystal. The OC51T series provides frequencies from 10 to 40MHz in a 9.7mm x 7.5mm x 4.1mm miniature SMD four-pad package with 3.3V and 5V supply voltage options. With voltage control as standard, the OCXOs achieve frequency stability of ±20ppb maximum making them perfect for use in applications demanding exceptionally accurate timing signals including cellular base stations, radio transmitters, defence communications equipment and for precision frequency measurement. Frequency stability versus temperature is ±10ppb over -30C to +70C and ±20ppb over -40C to +85C. Against voltage change, stability is ±10ppb for a ±5% input voltage change. Warm up time of five minutes maximum results in frequency output within ±0.1ppm of reference frequency while frequency stability against ageing is ±3.0ppb maximum after 30 days, ±600ppb maximum first year and ±3ppm maximum over 10 years. Voltage control specifications provide greater than ±5% reference to nominal frequency at 25C and over operating temperature range. Control voltage range is +1.65V, ±1.65V.