鈥?/div>
Tight tolerance
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.
STANDARD ELECTRICAL SPECIFICATIONS
PARAMETER
Frequency Range
Frequency Tolerance
Frequency Coef鏗乧ient
Operating Temperature Range
Storing Temperature Range
Shunt Capacitance
Motional Capacitance
Load Capacitance
Insulation Resistance
Drive Level
Aging (鏗乺st year)
Equivalent Series Resistance(ESR)
SYMBOL
F
O
鈭?/div>
F/F
O
K
T
OPR
T
STG
C
O
C
1
CL
IR
DL
Fa
Rs
at 25擄C 鹵 3擄C
100V
DC
at 25擄C
ref to 25擄C
CONDITION
UNIT
KHz
ppm
ppm/(
鈭?/div>
擄C)
2
擄C
擄C
pF
fF
pF
M
鈩?/div>
碌W
ppm
K
鈩?/div>
- 5.0
500
1
+ 5.0
50
1
- 10
- 20
0.85
2
12.5
MIN
TYPICAL
32.768
鹵 20
- 0.042
+ 60
+ 70
2
4
MAX
DIMENSIONS
in inches [millimeters]
0.248
[6.3] Max
0.083
[2.1] Max
0.158
[4.0] Min
0.028
[0.7]
0.008
[0.20]
PARABOLIC TEMPERATURE CURVE
TEMPERATURE (擄C)
- 20
- 10
0
10
20
30
40
50
60
70
- 10
- 20
- 30
- 40
- 50
ORDERING INFORMATION
- 60
鈭咶/f(ppm)
XT26T
MODEL
32.768KHz
FREQUENCY/KHz
To determine frequency stability, use parabolic curvature (k).
For example: What is stability at 45擄C?
1) Change in Temperature (擄C) = 45 - 25 = 20擄C
2) Change in Frequency = - 0.042ppm*(
鈭?/div>
擄C)
= - 0.042ppm*(20)
2
= - 16.8ppm(max)
Document Number: 35017
Revision: 28-Mar-03
For technical questions contact: frequency@vishay.com
www.vishay.com
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