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ECX-26X/ECX-15X
32.768 KHz SMD TUNING FORK CRYSTAL
The miniature ECX-26X and the sub-miniature ECX-15X 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 * RoHS Compliant w/exemption for Pb in high temp solder * Tape & Reel packaging
PART NUMBERING GUIDE "EXAMPLE"
MANUFACTURER ECS - FREQUENCY (32.768 MHz) .327 - LOAD CAPACITANCE* 12.5 - PACKAGE TYPE 26X
* Package type examples (26X=ECX-26X, 27X=ECX-15X) Sample Part Number: ECS-.327-12.5-26X
OPERATING CONDITIONS/ELECTRICAL CHARACTERISTICS
PARAMETERS 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 CONDITIONS FO f/fo Optional CL available DL R1 Q +20 CO TOPR TSTG @ 100V DC 15V @ +25C 3C C1 -20 -40 500M 0.0025 MIN ECX-26X TYP 32.768 12.5 1.0 50K 70K +25 -0.35 0.9 360 +30 -0.04 +20 70K +25 -0.35 0.95 380 MAX 20 12.5 1.0 55K +30 -0.04 MIN ECX-15X TYP 32.768 MAX 20 UNITS KHz PPM pF W Q C PM/C pF C C PPM PF
+70 +125 3
-20 -40 500M +0.0025
+70 +125 3
PACKAGE DIMENSIONS (mm)
8.95 0.05
7.95 0.05
RECOMMENDED OSCILLATION CIRCUIT
#2
Rf
PARABOLIC TEMPERATURE CURVE
T (C)
-20 -10 0 10 20 30 40 50 -10 -20 60 70
2.25 0.05
2.05 0.05
#2 #3

#3

#1
#1
2.05 0.05
1.55 0.05
Rd
-30 -40
0.75 0.6 0.75
0.85
#2 #3 #1
#2 #3 #1
-50
C1 C2
-60
0.9
0.85
f/f (PPM)
0.75
0.75
0.75
0.75
Figure 1) ECX-26X Top, Side Bottom & End views
Figure 3) ECX-15X Top, Side Bottom & End views
0.85 0.5 0.85
0.95
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) Change in frequency = -0.04 PPM x (T)2 = -0.04 PPM x (20)2 = -16.0 PPM
0.95
0.7
2.7
0.8
2.2
0.7
0.85
7.4
0.85
0.85
0.6
0.6
6.4
0.85
Figure 2) ECX-26X Land Pattern
Figure 4) ECX-15X 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 14 SMD CRYSTALS

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