ECX-26/ECX-15 32.768 KHz SMD TUNING FORK CRYSTAL The miniature ECX-26 and the sub-miniature ECX-15 are compact, cost effective SMD tuning fork crystals. The slimline molded package requires less space than other SMD tuning fork crystals. FEATURES • Cost effective • Low profile • Long term stability • Tape & Reel packaging PART NUMBERING GUIDE “EXAMPLE” MANUFACTURER ECS FREQUENCY (32.768 MHz) .327 – LOAD CAPACITANCE* 12.5 – PACKAGE TYPE 26 – * Package type examples (26=ECX-26, 27=ECX-15) Sample Part Number: ECS-.327-12.5-26 OPERATING CONDITIONS/ELECTRICAL CHARACTERISTICS PARAMETERS CONDITIONS FREQUENCY RANGE FREQUENCY TOLERANCE LOAD CAPACITANCE DRIVE LEVEL EQUIV. SERIES RESISTANCE Q-FACTOR TURNOVER TEMPERATURE TEMPERATURE COEFFICIENT SHUNT CAPACITANCE CAPACITANCE RATIO OPERATING TEMP RANGE STORAGE TEMP RANGE INSULATION RESISTANCE AGING (FIRST YEAR) MOTION CAPACITANCE ECX-26 TYP 32.768 MIN FO ∆f/fo Optional CL available DL R1 Q MAX MIN ECX-15 TYP 32.768 ±20 12.5 1.0 50K 70K +25 -0.35 0.9 360 β CO T OPR T STG @ 100V DC ±15V @ +25˚C ±3˚C C1 KHz PPM pF µW Ω Q ˚C PPM/˚C 2 pF ±20 12.5 +20 UNITS MAX -20 -40 500M 1.0 55K +30 -0.04 +20 +70 +125 -20 -40 500M 70K +25 -0.35 0.95 380 +30 -0.04 +70 +125 ±3 0.0025 ˚C ˚C Ω PPM PF ±3 +0.0025 PARABOLIC TEMPERATURE CURVE PACKAGE DIMENSIONS (mm) T (˚C) -20 -10 0 10 20 30 40 50 60 70 -10 7.95 ±0.05 2.05 ±0.05 #2 #3 #1 -20 -30 #2 -40 #3 -50 <Top View> -60 #1 f/f (PPM) 1.55 ±0.05 <Top View> #1 0.75 0.75 0.85 #3 Figure 1) ECX-26 Top, Side Bottom & End views #1 0.75 0.75 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 0.75 0.6 0.75 #2 #3 0.9 #2 0.85 2.05 ±0.05 2.25 ±0.05 8.95 ±0.05 RECOMMENDED OSCILLATION CIRCUIT Figure 3) ECX-15 Top, Side Bottom & End views Rf 0.85 7.4 0.85 Figure 2) ECX-26 Land Pattern 0.85 0.5 0.85 0.6 0.6 2.2 0.95 0.7 0.8 2.7 0.7 0.95 Rd 0.85 6.4 C1 0.85 C2 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. ELECTRICAL CHARACTERISTICS IC: TC 4069P, Rf: 10MΩ Rd: 330KΩ (As required) C 1 = 22pF, C 2 = 22pF, V DD = 3.0V Figure 4) ECX-15 Land Pattern ECS, INC. INTERNATIONAL 1105 S. RIDGEVIEW, OLATHE, KS 66062 • 913-782-7787 • 800-237-1041 • FAX 913-782-6991 • WWW.ECSXTAL.COM SMD CRYSTALS 15 SMD CRYSTALS