ECX-71 SMD CRYSTAL The miniature ECX-71 is a very compact SMD Tuning Fork Crystal. The 7 x 1.5 x 1.4 mm plastic package is ideal for Request a Sample commercial and industrial applications. OPERATING CONDITIONS / ELECTRICAL CHARACTERISTICS ECX -71 SMD CRYSTAL PARAMETERS CONDITIONS ECX-71 UNITS MIN TYP MAX Frequency Fo 32.768 KHz Frequency Tolerance @ +25°C ± 20 ppm Load Capacitance Specify in P/N 12.5 pF Drive Level DL 0.1 1.0 μW Equivalent Series Resistance R1 65K Ω Turnover Temperature +20 +25 +30 °C Temperature Coefficient -0.025 -0.035 -0.045 ppm/°C² • Low Profile Shunt Capacitance Co 0.8 pF • 7 x 1.5 mm Footprint • Extended Temp. Range Aging (First Year) @ +25°C ±3°C ±3 ppm • RoHS Compliant Operating Temperature Topr -40 +85 °C • Low Power RTC Applications Storage Temperature Tstg -55 +125 °C such as STM32 AN2867 • DIMENSIONS (mm) PAD CONNECTIONS 1 In/Out 4 Out/In Figure 1) Top, Side, and Bottom views Figure 2) Suggested Land Pattern PART NUMBERING GUIDE: Example ECS-.327-12.5-38-TR ECS - FREQUENCY ABBREVIATION LOAD PACKAGE PACKAGING CAPACITANCE ECS .327 = 32.768 KHz 12.5 = 12.5 pF -38 = ECX-71 TR = Tape 9 = 9 pF & Reel 7 = 7 pF 3K/Reel 6 = 6 pF Rev.2017 15351 West 109th Street | Lenexa, KS 66219 | Phone: 913.782.7787 | Fax: 913.782.6991 | www.ecsxtal.com

ECX-71 SMD CRYSTAL POCKET TAPE DIMENSIONS (mm) SOLDER PROFILE Peak solder Temp +260°C Max 10 sec Max. 2 Cycles Max. MSL 1, Lead Finish Sn Figure 1) Suggested Reflow Profile 15351 West 109th Street | Lenexa, KS 66219 | Phone: 913.782.7787 | Fax: 913.782.6991 | www.ecsxtal.com