ECX-3TAX
MICRO MINIATURE SMD TUNING FORK CRYSTAL
The ECX-3TAX is a 2.0 mm low profile rug-
gedized thermoplastic molded 32.768KHz
SMD tuning fork crystal. This crystal is excel-
lent 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”
MANUFACTURER
ECS
–
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
C
L
D
L
@ +25˚C
R
1
T
OPR
Q
T
O
T
STG
IR
C
o
C
1
Δf/fo
ECX-3TA
32.768
12.5 Standard (6.0 Optional)
1.0 max.
±20
50 max.
-0.040 PPM /˚C
2
max.
-10 ~ +60
-40 ~ +85
50,000 min.
+25 ± 5
-55 ~ +125
500M
Ω
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
RECOMMENDED 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
C
1
C
2
-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
= 22pF, C
2
= 22pF
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 cur-
vature. 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
ECS [ ECS, INC. ]
