The ultra-minature ECX-12R is a very compact SMD Tuning Fork Crystal. The 2.0 x 1.2 x 0.6 mm ceramic package with reduced ESR is ideal for IOT and Wearable technology. ECX-12R 32.768 KHz SMD Tuning Fork Crystal Low ESR Request a Sample ECX-12R SMD CRYSTAL Low ESR 70K Ohms Max. 2.0 x 1.2 mm Footprint Extended Temp. Range RoHS Compliant Applications: Metering, Automotive, Industrial, IOT and Wearables. DIMENSIONS (mm) OPERATING CONDITIONS / ELECTRICAL CHARACTERISTI.