ABLS2 SMD Microprocessor Crystals Abracon ABLS2 SMD Microprocessor Crystals offer a 3.57MHz to 70MHz frequency range, low height of 3mm, and 180Ω maximum ESR rating. ABLS2 crystals are suitable for RoHS compliant reflow, and feature tight stability and an extended temperature range. Abracon ABLS2 SMD Microprocessor Crystals are ideal for computers, modems, and wireless applications.