ECS-3X8X_14 Datasheet, PDF (1/2 Pages) ECS, Inc. – 32.768 KHz TUNING FORK

ECS-3X8X, 2X6X, 1X5X 32.768 KHz TUNING FORK
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
• PbFree/RoHS Compliant
PART NUMBERING GUIDE “EXAMPLE”
MANUFACTURER
FREQUENCY
ECS
–
.327
–
ECS
–
.327
–
ECS
–
.327
–
* Package type examples (8X=3x8, 13X=2x6, 14X=1x5)
LOAD CAPACITANCE
12.5
12.5
8
PACKAGE TYPE*
–
8X
–
13X
–
14X
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
Δf/fo
CL
DL
R1
Q
TM
ß
Co
TOPR
TSTG
IR
Δf/fo
C1
ECS-3X8X
ECS-2X6X
ECS-1X5X
32.768
32.768
32.768
±20
±20
±20
12.5
12.5
8.0
1
1
1
35 (max.)
35 (max.)
40 (max.)
90,000 (typ.)
70,000 (typ.)
80,000 (typ.)
+25 ±5
-0.040ppm/˚C² max.
+25 ±5
-0.040ppm/˚C² max.
+25 ±5
-0.040ppm/˚C² max.
1.60 (typ.)
1.35 (typ.)
1.00 (typ.)
460 (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.)
Note: Contact factory for optional load capacitance.
UNITS
KHz
PPM
pF
µW
KΩ
˚C
PPM/(ΔC˚)
pF
˚C
˚C
PPM
MΩ
PPM
pF
PACKAGE DIMENSIONS (mm)
8.2 Max.
10
Figure 1) ECS-3X8X
6.2 Max.
10
Figure 2) ECS-2X6X
5.1 Max.
4.3
Figure 3) ECS-1X5X
RECOMMENDED OSCILLATION
CIRCUIT
Rf
Rd
C1
C2
PARABOLIC TEMPERATURE CURVE
T (˚C) -20 -10 0 10 20 30 40 50 60 70
-10
-20
-30
-40
-50
-60
f/f (PPM)
ELECTRICAL CHARACTERISTICS
IC: TC 4069P
To determine frequency stability, use parabolic
curvature. For example: What is the stability at 45˚C?
Rf: 10MΩ
Rd: 330KΩ (As required)
C₁ = 22pF, C₂ = 22pF
V_DD = 3.0V
1) Change in T (˚C)
2) Change in frequency
= 45 -25 = 20˚C
= -0.04 PPM x (_ΔT) ²
= -0.04 PPM x (20) ²
= -16.0 PPM
In this circuit, low drive level with a maximum of 1µW is rec-
ommended. If excessive drive is applied, irregular oscillation
or quartz element fractures may occur.
ECS, INC. INTERNATIONAL 1105 S. RIDGEVIEW, OLATHE, KS 66062 • 913-782-7787 • 800-237-1041 • FAX [phone] • WWW.ECSXTAL.COM
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