Data Sheet

PARAMETERS 3X8X 2X6X 1X5X CONDITIONS
FREQUENCY RANGE f
o
20KHz ~ 40KHz 30KHz ~ 150KHz 200KHz KHz
FREQUENCY TOLERANCE Δf/f
o
±30 PPM ±30 PPM ±10,000 PPM @ +25˚C
FREQUENCY VS. TEMP. CHARAC. Δf/f
o
See Drawing -10˚C ~ +60˚C
TURNOVER TEMPERATURE Tm +25˚C typ.
TEMPERATURE COEFFICIENT ß -0.034 PPM/˚C
2
typ.
Varies depending on frequency
OPERATING TEMP. RANGE T
OPR
-10 ~ +60 ˚C
STORAGE TEMP. RANGE T
STG
-40 ~ +85 ˚C
EQUIVALENT SERIES RESISTANCE R
1
30 ~ 50 (
max.
) 10 (
max.
) KΩ
LOAD CAPACITANCE C
L
12.5pF typ. (Customer Specified) pF
MOTIONAL CAPACITANCE C
1
1 ~ 4fF typ. fF
SHUNT CAPACITANCE C
0
0.8 ~ 1.7pF typ. pF
CAPACITANCE RATIO τ 425 ~ 800 typ.
DRIVE LEVEL DL 1µW
max.
µW
INSULATION RESISTANCE IR 500 MΩ
min.
DC 100V±15
AGING
(FIRST YEAR)
Δf/f
o
±5 PPM max. +25˚C ± 3˚C
±5 PPM max. Conditions will vary
SHOCK RESISTANCE
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
4
ECS, INC. INTERNATIONAL 1105 S. RIDGEVIEW, OLATHE, KS 66062 • 913-782-7787 • 800-237-1041 • FAX [phone] • WWW.ECSXTAL.COM
CRYSTALS 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
ECS-31X
SERIES
LOW FREQUENCY QUARTZ CRYSTALS
OPERATING CONDITIONS/ELECTRICAL CHARACTERISTICS
PART NUMBERING GUIDE “EXAMPLE”
MANUFACTURER FREQUENCY LOAD CAPACITANCE PACKAGE TYPE*
ECS – .400 – 12.5 – 8X
ECS – .400 – 12.5 – 13X
ECS – 2.0 – 12.5 – 14X
PACKAGE DIMENSIONS (mm)
Figure 1) ECS-31X-8
ø 2.1 Max
ø 0.26
0.7
6.2 Max. 10
Figure 2) ECS-31X-13
ø 1.5 Max
ø 0.2
0.45
5.1 Max. 4.3
Figure 3) ECS-31X-14
* Package type examples (8x=3x8, 13x=2x6, 14x=1x5)
PARABOLIC TEMPERATURE CURVE
-20
-10
-20
-30
-40
-50
-60
-10 010 20304050 60 70
f/f (PPM)
T (˚C)
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 (
ΔS
T)
2
= -0.04 PPM x (20)
2
= -16.0 PPM
Ø
3.1 Max.
ø 0.35
1.1
8.2 Max. 10