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| ECS-3X8, 2X6, 1X5 32.768 KHz TUNING FORK CRYSTALS ECS tuning fork type crystals are used as a clock source in communication equipment, measuring instruments, microprocessors and other time management applications. Their low power consumption makes these crystals ideal for portable equipment. FEATURES * Cost effective * Tight tolerance * Long term stability * Excellent resistance and environmental characteristics PART NUMBERING GUIDE "EXAMPLE" ECS ECS ECS - - - FREQUENCY .327 .327 .327 - - - LOAD CAPACITANCE 12.5 12.5 8 - - - PACKAGE TYPE* 8 13 14 * Package type examples (8=3x8, 13=2x6, 14=1x5) OPERATING CONDITIONS/ELECTRICAL CHARACTERISTICS PARAMETERS NOMINAL FREQUENCY FREQUENCY TOLERANCE LOAD CAPACITANCE (typ.) DRIVE LEVEL (max.) RESISTANCE AT SERIES RESONANCE Q-FACTOR TURNOVER TEMPERATURE TEMPERATURE COEFFICIENT SHUNT CAPACITANCE CAPACITANCE RATIO OPERATING TEMP. RANGE STORAGE TEMP. RANGE SHOCK RESISTANCE INSULATION RESISTANCE AGING (FIRST YEAR) MOTIONAL CAPACITANCE Fo f/fo CL DL R1 Q TM Co T OPR T STG IR f/fo C1 ECS-3X8 32.768 20 12.5 1 35 (max.) 90,000 (typ.) +25 5 -0.040ppm/C 2 max. 1.60 (typ.) 460 (typ.) ECS-2X6 ECS-1X5 32.768 32.768 20 20 12.5 8.0 1 1 35 (max.) 40 (max.) 70,000 (typ.) 80,000 (typ.) +25 5 +25 5 -0.040ppm/C 2 max. -0.040ppm/C 2 max. 1.35 (typ.) 1.00 (typ.) 450 (typ.) 400 (typ.) -10~+60 -40~+85 Drop test 3 times on hard wooden board from height of 75cm / 5 PPM max. 500M min./DC100V 3 PPM max. @ +25C 3C 0.0035 (typ.) 0.0030 (typ.) 0.0025 (typ.) UNITS KHz PPM pF W K C PPM/(C) pF C C PPM M PPM pF Note: Contact factory for optional load capacitance. PACKAGE DIMENSIONS (mm) 1.1 O 3.1 Max. RECOMMENDED OSCILLATION CIRCUIT Rf PARABOLIC TEMPERATURE CURVE T (C) -20 -10 0 10 20 30 40 50 -10 -20 60 70 o 0.35 8.2 Max. 10 Rd -30 -40 -50 Figure 1) ECS-3X8 0.7 C1 C2 -60 o 2.1 Max o 0.26 f/f (PPM) 6.2 Max. 10 Figure 2) ECS-2X6 0.45 o 1.5 Max ELECTRICAL CHARACTERISTICS IC: TC 4069P Rf: 10M Rd: 330K (As required) C 1 = 22pF, C 2 = 22pF V DD = 3.0V In this circuit, low drive level with a maximum of 1W is recommended. If excessive drive is applied, irregular oscillation or quartz element fractures may occur. To determine frequency stability, use parabolic curvature. For example: What is the stability at 45C? 1) Change in T (C) = 45 -25 = 20C 2 2) Change in frequency = -0.04 PPM x (T) 2 = -0.04 PPM x (20) = -16.0 PPM 5.1 Max. 4.3 Figure 3) ECS-1X5 ECS, INC. INTERNATIONAL 1105 S. RIDGEVIEW, OLATHE, KS 66062 * 913-782-7787 * 800-237-1041 * FAX 913-782-6991 * WWW.ECSXTAL.COM CRYSTALS 3 o 0.2 CRYSTALS |
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