CSTCE8M00G52-R0 datasheet(9/32 Pages) MURATA

9 / 32 page

Note • Please read rating and CAUTION (for storage, operating, rating, soldering, mounting and handling) in this catalog to prevent smoking and/or burning, etc.

• This catalog has only typical specifications because there is no space for detailed specifications. Therefore, please review our product specifications or consult the approval sheet for product specifications before ordering.

Principles of CERALOCK®

The table on this page shows a comparison of the

equivalent constants between CERALOCK® and a

quartz crystal oscillator.

In comparison, there is a large difference in capacitance

and Qm, which results in the difference of oscillating

conditions, when actually operated.

The table in the appendix shows the standard values of

an equivalent circuit constant for each type of

CERALOCK®. Furthermore, other higher harmonic

modes exist, other than the desired oscillation mode.

These other oscillation modes exist because the ceramic

resonator uses mechanical resonance.

Fig. 2-5 shows those characteristics.

Fig. 2-5 Spurious Characteristics of CERALOCK®

100k

10k

100

Frequency (MHz)

Main Vibration

3rd Vibration

CSTLS4M00G53–B0

■

Comparison of Equivalent Circuits of CERALOCK® and Crystal Oscillator

Resonator

Oscillation Frequency

L1 (μH)

C1 (pF)

C0 (pF)

R1 (Ω)

dF (kHz)

CERALOCK®

Crystal

2.00MHz

4.00MHz

8.00MHz

2.457MHz

4.00MHz

8.00MHz

1.71×103

0.46×103

0.13×103

7.20×105

2.10×105

1.80×105

4.0

3.8

3.5

0.005

0.007

0.002

20.8

19.8

19.9

2.39

4.48

43.9

9.0

8.0

37.0

22.1

154.7

475

1220

775

298869

240986

59600

177.2

350.9

641.6

P17E.pdf

2012.10.31

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