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June 10, 2006
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How to build a Part Number:
Part Number Example:
CTP3-32.768-12.5-20-R
CTP3- 3.8 x 8.0 mm Thermoplastic SMD Package
32.768 KHz Nominal Frequency
12.5 pF Load Capacitance
20: ±20 PPM Frequency Tolerance
-10 to +60° C Temperature Range
R: Tape and Reel Packaging
Notes:
1- Standard Temperature Range does not need to be included in Part Number description.
2- Product is shipped in Tape and Reel conguration. Each reel contains 3000 pieces.
3- Quantities less than 3000 are shipped bulk in ESD pouches.
4- Specication subject to change without notice.
CTP3-32.768-12.5-20
3.8 x 8.0 mm Thermoplastic SMD
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Frequency Tolerance
Package
Series
-
-
Temperature Range
Frequency
Load Capacitance
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Frequency vs. Temperature Characteristics:
To calculate the frequency stability the parabolic
curvature constant (K) is needed.
For calculating the stability at 45 ° C?
1- Change in temperature (T) is (45-25) = +20 ° C
2- Change in frequency is (-0.035 x (° C)2) =
(-0.035 x (20)2 = -14 PPM