High reliability crystal oscillators to military spec
Euroquartz (Crewkerne, UK) is targeting the military specification crystal oscillators for applications that require high reliability, tight frequency calibration tolerance and high stability over a wide temperature range. Frequency range is from 200 kHz to 200 MHz with calibration tolerance of ±30ppm at 25°C and frequency tolerance of ±100 to ±50ppm over the full military temperature range from -55 to +125°C (±100 to ±30 ppm over industrial temperature range from -40 to +85°C).
The high reliability ceramic substrate is packaged in a hermetically-sealed DIL metal package with four pins (EQXO-1000BMK) or 14 pins (EQXO-3000BMK) for extra mechanical security. Additional specifications include 5000g shock survivability, 20g vibration survivability, double-sealed design, low EMI emission and standard 5.0 VDC supply voltage (other voltages on request). Start-up time is 5 msec maximum with rise/fall time of 6 nsec maximum and minimum duty cycle of 40%, 60% maximum. Standard output is CMOS, 50 pF with other outputs available to special order. The oscillators can be screened to MIL-O-55310F, class B if required.
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