Microchip Technology has released the 5071B caesium atomic clock which, the company says, can perform autonomous time keeping for months in the event of GNSS denials.

The 5071B is available in a 3U 19-inch rackmount enclosure and has upgraded electronic components to address possible obsolescence or non-Restriction of Hazardous Substances Directive (RoHS) circuitry. The product provides 100 ns holdover for more than two months, maintaining system synchronisation when GNSS signals such as GPS are denied. As a caesium beam tube product with no deterministic long-term frequency drift, the 5071B provides absolute frequency accuracy of 500 quadrillionths over all specified environmental conditions for the life of the product.

The unit is fully compliant with the RoHS Directive, meaning it is available in regions where regulatory policies are in place.