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 ß 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. 500MΩ min./DC100V ±3 PPM max. @ +25˚C ±3˚C 0.0035 (typ.) 0.0030 (typ.) 0.0025 (typ.) UNITS KHz PPM pF µW KΩ ˚C PPM/(∆C˚) pF ˚C ˚C PPM MΩ PPM pF Note: Contact factory for optional load capacitance. PACKAGE DIMENSIONS (mm) 1.1 RECOMMENDED OSCILLATION CIRCUIT T (˚C) Rf ø 0.35 Ø 3.1 Max. PARABOLIC TEMPERATURE CURVE -20 -10 0 10 20 30 40 50 60 70 -10 -20 8.2 Max. Rd 10 -30 -40 Figure 1) ECS-3X8 -50 C2 ø 0.26 ø 2.1 Max 0.7 C1 6.2 Max. f/f (PPM) ELECTRICAL CHARACTERISTICS IC: TC 4069P Rf: 10MΩ Rd: 330KΩ (As required) C 1 = 22pF, C 2 = 22pF V DD = 3.0V 10 ø 0.2 ø 1.5 Max 0.45 Figure 2) ECS-2X6 5.1 Max. -60 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 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. 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 CRYSTALS