Crystals earlier mentioned thirty MHz (up to >two hundred MHz) are frequently operated at series resonance in which the impedance appears at its bare minimum and equivalent on the sequence resistance. For these crystals the sequence resistance is specified ( This series of products is commonly Utilized in customer electronics, https://thesocialcircles.com/story4672918/the-fact-about-smd-crystal-oscillators-that-no-one-is-suggesting