ECS 31X Data Sheet
ECS-31X
SERIES
LOW FREQUENCY QUARTZ CRYSTALS
The ECS-31X Series features the same
characteristics as only tuning fork crystals
offer. Because of their miniature size they
are ideal for portable and communication
equipment applications.
FEATURES
•
Miniature size
•
Cost effective
•
Long term stability
• Excellent shock and vibration
characteristics
• PbFree/RoHS Compliant
PART NUMBERING GUIDE
MANUFACTURER FREQUENCY LOAD CAPACITANCE PACKAGE TYPE*
ECS – .400 – 12.5 – 8X
ECS – .400 – 12.5 – 13X
ECS – 2.0 – 12.5 – 14X
* Package type examples (8x=3x8, 13x=2x6, 14x=1x5)
“EXAMPLE”
OPERATING CONDITIONS/ELECTRICAL CHARACTERISTICS
PARAMETERS
FREQUENCY RANGE fo 20KHz ~ 40KHz 30KHz ~ 150KHz 200KHz KHz
FREQUENCY TOLERANCE Δf/fo ±30 PPM ±30 PPM ±10,000 PPM @ +25˚C
FREQUENCY VS. TEMP. CHARAC. Δf/fo See Drawing -10˚C ~ +60˚C
TURNOVER TEMPERATURE Tm +25˚C typ.
TEMPERATURE COEFFICIENT ß -0.034 PPM/˚C2 typ.
OPERATING TEMP. RANGE T
STORAGE TEMP. RANGE T
EQUIVALENT SERIES RESISTANCE R1 30 ~ 50 (
LOAD CAPACITANCE CL 12.5pF typ. (Customer Specified) pF
MOTIONAL CAPACITANCE C1 1 ~ 4fF typ. fF
SHUNT CAPACITANCE C0 0.8 ~ 1.7pF typ. pF
CAPACITANCE RATIO τ 425 ~ 800 typ.
DRIVE LEVEL DL 1µW
INSULATION RESISTANCE IR 500 MΩ
AGING
(FIRST YEAR)
SHOCK RESISTANCE
Δf/f
3X8X 2X6X 1X5X CONDITIONS
Varies depending on frequency
-10 ~ +60 ˚C
OPR
-40 ~ +85 ˚C
STG
±5 PPM max. +25˚C ± 3˚C
o
±5 PPM max. Conditions will vary
Drop test of 3 times on a hard board from 75 cm height or shock test of 3000G x 0.3ms x 1/2 sin wave x 3 directions depending on frequency
max.
) 10 (
max.
µW
min.
DC 100V±15
max.
) KΩ
PACKAGE DIMENSIONS (mm)
1.1
3.1 Max.
Ø
ø 2.1 Max
8.2 Max. 10
Figure 1) ECS-31X-8
0.7
6.2 Max. 10
Figure 2) ECS-31X-13
ø 0.35
ø 0.26
ø 1.5 Max
5.1 Max. 4.3
Figure 3) ECS-31X-14
0.45
ø 0.2
PARABOLIC TEMPERATURE CURVE
T (˚C)
-10 010 2030405060 70
-20
-10
-20
-30
-40
-50
-60
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 (
= -0.04 PPM x (20)
= -16.0 PPM
ΔS
2
T)
2
ECS, INC. INTERNATIONAL 1105 S. RIDGEVIEW, OLATHE, KS 66062 • 913-782-7787 • 800-237-1041 • FAX 913-782-6991 • WWW.ECSXTAL.COM
CRYSTALS CRYSTALS
4
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