ECS-31 SERIES LOW FREQUENCY QUARTZ CRYSTALS The ECS-31 Series features the same characteristics as only tuning fork crystals offer. Because of their miniature size they are ideal for portable and communication equipment applications. FEATURES • Miniature size • Cost effective • Long term stability • Excellent shock and vibration characteristics PART NUMBERING GUIDE “EXAMPLE” MANUFACTURER ECS ECS ECS – – – FREQUENCY .400 .400 2.0 – – – LOAD CAPACITANCE 12.5 12.5 12.5 PACKAGE TYPE* 8 13 14 – – – * Package type examples (8=3x8, 13=2x6, 14=1x5) OPERATING CONDITIONS/ELECTRICAL CHARACTERISTICS PARAMETERS FREQUENCY RANGE FREQUENCY TOLERANCE FREQUENCY VS. TEMP. CHARAC. TURNOVER TEMPERATURE TEMPERATURE COEFFICIENT OPERATING TEMP. RANGE STORAGE TEMP. RANGE EQUIVALENT SERIES RESISTANCE LOAD CAPACITANCE MOTIONAL CAPACITANCE SHUNT CAPACITANCE CAPACITANCE RATIO DRIVE LEVEL INSULATION RESISTANCE AGING (FIRST YEAR) fo ∆f/f o ∆f/f o Tm ß T OPR TSTG R1 CL C1 C0 τ DL IR ∆f/f o SHOCK RESISTANCE 3X8 20KHz ~ 40KHz ±30 PPM 2X6 30KHz ~ 150KHz ±30 PPM See Drawing +25˚C typ. 2 -0.034 PPM/˚C typ. -10 ~ +60 -40 ~ +85 30 ~ 50 (max.) 12.5pF typ. (Customer Specified) 1 ~ 4fF typ. 0.8 ~ 1.7pF typ. 425 ~ 800 typ. 1µW max. 500 MΩ min. ±5 PPM max. ±5 PPM max. 1X5 200KHz ±10,000 PPM CONDITIONS KHz @ +25˚C -10˚C ~ +60˚C Varies depending on frequency ˚C ˚C KΩ pF fF pF 10 (max.) µW DC 100V±15 +25˚C ± 3˚C Conditions will vary depending on frequency Drop test of 3 times on a hard board from 75 cm height or shock test of 3000G x 0.3ms x 1/2 sin wave x 3 directions PARABOLIC TEMPERATURE CURVE PACKAGE DIMENSIONS (mm) 0.45 ø 0.2 ø 0.35 ø 1.5 Max 1.1 Ø 3.1 Max. 8.2 Max. T (˚C) Figure 1) ECS-31-8 0 10 20 30 40 50 60 70 -10 -20 -30 -40 5.1 Max. 10 -20 -10 4.3 Figure 3) ECS-31-14 -50 -60 ø 0.26 ø 2.1 Max 0.7 f/f (PPM) 6.2 Max. 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 2) Change in frequency = -0.04 PPM x (∆T) 2 = -0.04 PPM x (20) = -16.0 PPM 10 Figure 2) ECS-31-13 ECS, INC. INTERNATIONAL 1105 S. RIDGEVIEW, OLATHE, KS 66062 • 913-782-7787 • 800-237-1041 • FAX 913-782-6991 • WWW.ECSXTAL.COM CRYSTALS 4 CRYSTALS