ECX-16 32.768 KHz SMD Tuning Fork Crystal The minature ECX-16 is a very compact SMD Tuning Fork Crystal. Low ESR part recommended by STMicroelectronics for the STM32 Microcontrollers. Request a Sample OPERATING CONDITIONS / ELECTRICAL CHARACTERISTICS ECX-16 SMD CRYSTAL PARAMETERS CONDITIONS ECX-16 MIN TYP Frequency Load Capacitance KHz ± 20 * @ +25°C Specify in P/N 12.5 ppm pF Drive Level DL 0.5 μW Equivalent Series Resistance R1 90K Ω 6.5 Motional Capacitance Turnover Temperature Temperature Coefficient Shunt Capacitance fF +20 +25 +30 °C -0.02 -0.03 -0.040 ppm/°C² Co Aging (First Year) DIMENSIONS (mm) MAX 32.768 Frequency Tolerance Low Power RTC Applications such as STM32 AN2867 1.6 x 1.0 mm Footprint Extended Temp. Range RoHS Compliant Applications: Automotive, COTS, Industrial, IOT UNITS 1.3 @ +25°C ±3°C pF ±3 ppm Operating Temperature Topr -40 +85 °C Storage Temperature Tstg -55 +125 °C PAD CONNECTIONS 1 In/Out 2 Out/In Figure 2) Suggested Land Pattern Figure 1) Top, Side, and Bottom views PART NUMBERING GUIDE: Example ECS-.327-12.5-16-TR ECS - FREQUENCY ABBREVIATION ECS .327 = 32.768 KHz LOAD CAPACITANCE PACKAGE 12.5 = 12.5 pF 9 = 9 pF 7 = 7 pF 5 = 5 pF -16 = ECX-16 CUSTOM OPTIONS PACKAGING Tolerance Blank = ±20 ppm * C = ± 10 ppm TR = Tape & Reel Rev.2017 15351 West 109th Street | Lenexa, KS 66219 | Phone: 913.782.7787 | Fax: 913.782.6991 | www.ecsxtal.com ECX-16 32.768 KHz SMD Tuning Fork Crystal POCKET TAPE DIMENSIONS (mm) SOLDER PROFILE Peak solder Temp +260°C Max 10 sec Max. 2 Cycles Max. MSL 1, Lead Finish Au Figure 1) Suggested Reflow Profile 15351 West 109th Street | Lenexa, KS 66219 | Phone: 913.782.7787 | Fax: 913.782.6991 | www.ecsxtal.com