ECX-306X/306IX SMD TUNING FORK CRYSTAL Housing for the ECX-306X/306IX crystal is made from the same thermoplastic that is industry standard for integrated circuits. This ruggedized molded package is excellent for SMD applications. FEATURES • Low profile • Long term stability • Industry standard footprint • Excellent shock resistance • Excellent environmental characteristics • Tape and Reel (3,000 pcs) • RoHS Compliant w/ Exemption for High Temp Solder PART NUMBERING GUIDE “EXAMPLE” MANUFACTURER ECS FREQUENCY .327 – LOAD CAPACITANCE 12.5 – PACKAGE TYPE** 17X – ** Package Type examples (-17X= ECX-306,X 17IX= ECX-306IX) OPERATING CONDITIONS/ELECTRICAL CHARACTERISTICS PARAMETERS NOMINAL FREQUENCY LOAD CAPACITANCE DRIVE LEVEL CALIBRATION TOLERANCE EQUIVALENT SERIES RESISTANCE TEMPERATURE COEFFICIENT OPERATING TEMPERATURE RANGE MAX. OPERATING TEMPERATURE RANGE Q FACTOR TURNOVER TEMPERATURE STORAGE TEMPERATURE RANGE INSULATION RESISTANCE SHUNT CAPACITANCE MOTIONAL CAPACITANCE AGING (FIRST YEAR) ECX-306/306 I 32.768 12.5 Standard (6.0 Optional) 1 max. ±20 50 max. -0.040 PPM/˚C2 max. -10 ~ +60 -40 ~ +85 50,000 min. +25 ± 5 -55 ~ +125 500M Ω min./ DC 100V 1.35 typical 0.003 pF typical ±3 PPM max. @ +25˚C Fo CL DL @ 25˚C R1 TOPR Q TO TSTG IR Co C1 Δf/fo UNITS KHz pF µW PPM KΩ PPM/(ΔC˚) ˚C °C °C °C MΩ pF pF PPM PACKAGE DIMENSIONS (mm) RECOMMENDED OSCILLATION CIRCUIT 8.0 Max. #4 Rf 8.7 Max. #3 #3 #1 #2 #3 #4 #2 #1 #4 #3 #1 #2 3.7 Max. 3.8 Max. #4 #2 #1 Rd C1 5.5 2.5 Max. 2.5 Max. 0.5 C2 5.5 0.5 al) 0.5 ypic 0.5 1.15 T (0.9 Figure 2) ECX-306I - Top, Side and End views with pin connections 1.9 Figure 1) ECX-306 - Top, Side and End views with pin connections In this circuit, low drive level with a maximum of 1µW is recommended. If excessive drive is applied, irregular oscillation or quartz element fractures may occur. PARABOLIC TEMPERATURE CURVE -20 -10 0 10 20 30 40 50 60 70 1.3 T (˚C) ELECTRICAL CHARACTERISTICS IC: TC 4069P Rf: 10MΩ Rd: 330KΩ (As required) C1 = 22pF, C2 = 22pF VDD = 3.0V 1.9 -10 -20 -30 1.3 4.2 1.3 -40 -50 -60 Figure 3) ECX-306/306 I Land Pattern - Top view f/f (PPM) To determine frequency stability, use parabolic curvature. For example: What is the stability at 45˚C? 1) Change in T (˚C) = 45 -25 = 20˚C 2) Change in frequency = -0.04 PPM x (ΔT) 2 = -0.04 PPM x (20) 2 = -16.0 PPM ECS, INC. INTERNATIONAL 1105 S. RIDGEVIEW, OLATHE, KS 66062 • 913-782-7787 • 800-237-1041 • FAX 913-782-6991 • WWW.ECSXTAL.COM SMD CRYSTALS 12 SMD CRYSTALS