Ultra-low jitter Clock Oscillators Suit Defence & Aerospace Applications


IQD has unveiled new surface mount clock oscillators with an ultra-low jitter designed for defense & aerospace applications such as smart munitions, guidance & navigation and communication systems; although the devices can also be used in demanding industrial applications.

The new STXO series has been designed with an ultra-low integrated RMS phase jitter of 256fs at 2.5V and RMS period jitter of 1.4ps over 10,000 cycles, claims the firm.

The phase noise level is -138dBc/Hz @ 1kHz and -163dBc/Hz at the noise floor, making the series ideal for the above stated applications, notes the firm.

Designed around a hermetically sealed high-shock crystal and a CMOS compatible integrated circuit, the series is able to survive shock levels of up to 20,000G and vibration levels of 20G at 10-2000Hz swept sine in accordance with MIL-STD-202G.


The products are offered in an industry standard 3.2 x 2.5mm 4-pad ceramic package with a metal lid. The series uses minor temperature compensation to achieve tight frequency stability of ±10ppm over an operating temperature range of -40 to +85 degrees C and ±20ppm over the full military operating temperature range of -55 to +125 degrees C.

Frequencies between 10MHz and 55MHz can be specified. Supply voltage can be 2.5V or 3.3V, and current consumption is 3mA with a 15pF CMOS drive capability.

Variants are also available which incorporate enable/disable and tri-state control. For military uses, the range can be specified with a number of termination finishes including tin/lead in applications where using a device that is RoHS compliant would cause approval issues.

However RoHS compliant finishes are also available for less sensitive applications. Duty cycle is 45% min and 55% max with a start-up time of 5ms max and a rise and fall time of 5ns max.
Packaging options include tray pack or tape and reel.

Printer Chip Sets A new Standard With 140 Pages Per Minute

Further product information is available at www.iqdfrequencyproducts.com/search/?q=stxo.

View the full Press release.



Please enter your comment!
Please enter your name here

Are you human? *