The miniature ECX-39 is a very compact SMD Tuning Fork Crystal. The 4.9 x 1.8 x 1.0 mm ceramic package is ideal for today’s SMD manufacturing environment. ECX-39 SMD CRYSTAL Request a Sample ECX-39 SMD CRYSTAL Low Profile 4.9 x 1.8 mm Footprint Extended Temp. Range RoHS Compliant DIMENSIONS (mm) OPERATING CONDITIONS / ELECTRICAL CHARACTERISTICS PARAMETERS Frequency Frequency Tolerance Load Capacitance Drive Level Equivalent Series Resistance Turnover T.