ECX-31B Low Profile 3.2 x 1.5 mm Footprint Extended Temp. Range RoHS Compliant SMD TUNING FORK CRYSTAL The ultra-miniature ECX-31B is a very compact SMD Tuning Fork Crystal. The 3.2 x 1.5 x 0.9 mm ceramic package is ideal for today's SMD manufacturing environment. OPERATING CONDITIONS / ELECTRICAL CHARACTERISTICS ECX-31B PARAMETERS CONDITIONS Frequency FO Frequency Tolerance @ +25°C Optional ±10 ppm, See P/N Guide Load Capacitance Specify in P/N 12.5 Drive Level DL 0.1 Equivalent Series Resistance R1 MIN TYP UNITS MAX 32.768 KHz ± 20 ppm pF 1.0 µW 70K Ω Turnover Temperature +20 +25 +30 °C Temperature Coefficient -0.028 -0.034 -0.040 ppm/°C² Shunt Capacitance Co 1.05 First Year Aging +25°C ±3°C Operating Temperature Topr Storage Temperature Insulation Resistance pF ±3 ppm -40 +85 °C Tstg -55 +125 °C @ 100V DC 500M Ω TOP, BOTTOM, SIDE VIEWS & LAND PATTERN PART NUMBERING GUIDE: Example ECS-.327-12.5-34B-TR ECS - Frequency Abbreviation - Load Capacitance - Package Type - Tolerance .327 = 32.768 KHz 1105 South Ridgeview Road z 12.5 = 12.5 pF 9 = 9 pF 7 = 7 pF Olathe, KS 66062 z -34B = ECX-31B Phone: 913.782.7787 Blank = ±20 ppm C = ±10 ppm z - Packaging -TR = Tape & Reel 3K/Reel Fax: 913.782.6991 z www.ecsxtal.com