Monolithic Crystal Filters [Products][Quartz Technology] Type Frequency (MHz) Poles Package 10M 10.7 2-8 Metal PTH 21M 21.4 2-8 Metal PTH 45M 45 2-4 Metal PTH 45F 45 2-4 Metal PTH 70M 70 2-4 Metal PTH 90M 90 2-4 Metal PTH S17M 17.9 2 7×5 SMD S21M 21.4 2 7×5 SMD S21.7M 21.7 2 7×5 SMD S45M 45 2 7×5 SMD XF38 45 , 46.35 2 3.8×3.8 SMD 96SMF 21.4 2 7x5x1.35 96SMF 21.7 2 7x5x1.35 96SMF 45 2 7x5x1.35 Model Holder Freq.(MHz) Poles 10M Metal PTH 10.7 2-8 21M Metal PTH 21.4 2-8 45M Metal PTH 45 2-4 45F(fund) Metal PTH 45 2-4 70M Metal PTH 70 2-4 90M Metal PTH 90 2-4 S17M SMD 7×5 17.9 2 S21M SMD 7×5 21.4 2 S21.7M SMD 7×5 21.7 2 S45M SMD 7×5 45 2 XF38 SMD 3.8×3.8 45 , 46.35 2 96SMF SMD 7×5 21.4 2 96SMF SMD 7×5 21.7 2 96SMF SMD 7×5 45 2 [Products][Quartz Technology]