XT38T Datasheet, PDF (1/3 Pages) Vishay Siliconix – Tuning Fork Crystal

Tuning Fork Crystal
XT38T
Vishay Dale
The tuning fork type quartz crystal provides ultimate in size,
performance and economic trade-offs. So it is used as a clock
source in communication equipment, measuring instrument,
microprocessor and other time management applications.
FEATURES
• Miniature package
• Low cost
• kHz frequency
• Tight tolerance
• 100 % Lead (Pb)-free and RoHS compliant
RoHS
COMPLIANT
STANDARD ELECTRICAL SPECIFICATIONS
PARAMETER
Frequency Range
Frequency Tolerance
Frequency Coefficient
Operating Temperature Range
Storing Temperature Range
Shunt Capacitance
Motional Capacitance
Load Capacitance
Insulation Resistance
Drive Level
Aging (first year)
Equivalent Series Resistance(ESR)
SYMBOL
F_O
ΔF/F_O
K
T_OPR
T_STG
C_O
C₁
CL
IR
DL
Fa
Rs
CONDITION
at 25 °C
ref to 25 °C
100 V_DC
at 25 °C ± 3 °C
DIMENSIONS in inches [millimeters]
0.122
[3.1] Max
0.326
[8.28] Max
0.012
[0.30]
UNIT
kHz
ppm
ppm/(Δ°C)²
°C
°C
pF
fF
pF
MΩ
µW
ppm
KΩ
MIN
- 10
- 20
1
500
- 5.0
TYPICAL
32.768
± 20
0.85
2
12.5
MAX
- 0.042
+ 60
+ 70
2
4
1
+ 5.0
35
PARABOLIC TEMPERATURE CURVE
TEMPERATURE (°C)
- 20 - 10
0
10
20
30 40
50 60 70
- 10
- 20
0.354
0.043
- 30
[9.0] Min
[1.1]
- 40
ORDERING INFORMATION
XT38T
MODEL
32.768 kHz
e2
FREQUENCY/kHz JEDEC LEAD (Pb)-FREE
STANDARD
- 50
- 60
∆F/f (ppm)
To determine frequency stability, use parabolic curvature (k).
For example: What is stability at 45 °C?
1) Change in Temperature (°C) = 45 - 25 = 20 °C
2) Change in Frequency = - 0.042 ppm*(Δ°C)
= - 0.042 ppm*(20)²
= - 16.8 ppm (max)
GLOBAL PART NUMBER
X
T
3
8
T
T
A
3
2
K
7
6
8
MODEL
OPERATING PACKAGE
TEMP.
CODE
FREQUENCY
Document Number: 35043
Revision: 18-Oct-07
For technical questions contact: [e-mail]
www.vishay.com
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