XRCGB SMT Crystal Resonators The Murata XCRGB Series are tiny (2.0mm x 1.6mm x 0.7mm), RoHS compliant hybrid crystal resonators with four connection pads on the base allowing there use on existing 3225 and 2520 board layouts and are available in frequencies ranging from 24 to 48MHz. Typical applications for these XRCGB crystal resonators include PCs, visual equipment and small portable equipment.