ECX-3TAX
MICRO MINIATURE SMD TUNING FORK CRYSTAL
The ECX-3TAX is a 2.0 mm low profile ruggedized thermoplastic molded 32.768KHz SMD tuning fork crystal. This crystal is excellent for SMD applications with limited circuit board space requirements.
FEATURES
• Low profile 2.0 mm maximum height • Industry standard footprint • Long term stability • Excellent shock resistance • Excellent environmental characteristics • Tape & Reel (3,000 pcs) • RoHS Compliant w/exemption for Pb in High Temp Solder
Discontinued
PART NUMBERING GUIDE “EXAMPLE”
M ANUFACTURER E CS – FREQUENCY .327 – LOAD CAPACITANCE 12.5 – PACKAGE TYPE 24X
OPERATING CONDITIONS/ELECTRICAL CHARACTERISTICS
PARAMETERS NOMINAL FREQUENCY LOAD CAPACITANCE DRIVE LEVEL CALIBRATION TOLERANCE EQUIVALENT SERIES RESISTANCE TEMPERATURE COEFFICIENT OPERATING TEMPERATURE RANGE MAX. OPERATING TEMPERATURE RANGE Q FACTOR TURNOVER TEMPERATURE STORAGE TEMPERATURE RANGE INSULATION RESISTANCE SHUNT CAPACITANCE MOTIONAL CAPACITANCE AGING (FIRST YEAR) Fo CL DL @ +25˚C R1 TOPR Q TO TSTG IR Co C1 Δf/fo E CX-3TA 32.768 12.5 Standard (6.0 Optional) 1.0 max. ±20 50 max. -0.040 PPM /˚C2 max. -10 ~ +60 -40 ~ +85 50,000 min. +25 ± 5 -55 ~ +125 500MΩ min./ DC 100V 2.0 typical 0.003 pF typical ±3 PPM max. @ +25˚C UNITS KHz pF µW PPM KΩ PPM/(ΔC˚) ˚C ˚C ˚C ˚C MΩ pF pF PPM
PACKAGE DIMENSIONS (mm)
#4 2.0 #3 2.5
R ECOMMENDED OSCILLATION CIRCUIT
Rf
PARABOLIC TEMPERATURE CURVE
T (˚C)
-20 -10
0 10 20 30 40 50 60 70 -10
#1 7.3 max.
#2
Rd
-20 -30
2.0 max.
1.8
C1
C2
-40 -50 -60
5.08
0.2 min.
0.4
Figure 1) ECX-3TA – Top, Side and End views
#4
#3
1.2
3.88
1.2
1.3
ELECTRICAL CHARACTERISTICS IC: TC 4069P Rf: 10MΩ Rd: 330KΩ (As required) C 1 = 2 2pF, C 2 = 2 2pF V DD = 3 .0V
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.
2.4
f/f (PPM)
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) Change in frequency = -0.04 PPM x (ΔT) 2 = -0.04 PPM x (20) 2 = -16.0 PPM
#1
#2
Figure 2) ECX-3TA – Land Pattern - Top view
ECS, INC. INTERNATIONAL 1105 S. RIDGEVIEW, OLATHE, KS 66062 • 913-782-7787 • 800-237-1041 • FAX 913-782-6991 • WWW.ECSXTAL.COM SMD CRYSTALS 13 SMD CRYSTALS
1.3
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