CSTCW24M0X53-R0 Datasheet, PDF (20/32 Pages) Murata Manufacturing Co., Ltd. – Ceramic Resonator

P17E.pdf
2012.10.31 ^{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.
4 _{Application to Typical Oscillation Circuits}
Oscillation frequency fosc. in this circuit is expressed
approximately by the following equation.
fosc.=Fr 1+ ^C1
C0+CL
(4-1)
Where, Fr=Resonance frequency of CERALOCK^®
Where, C1 : Equivalent series capacitance of
Where, C1 : CERALOCK^®
Where, C0 : Equivalent parallel capacitance of
Where, C1 : CERALOCK^®
Where,
Where, ^{C= LL==}
CL1 CL2
CL1+CL2
This clearly shows that the oscillation frequency is
influenced by the loading capacitance. Further caution
should be paid in defining its value when a tight
tolerance of oscillation frequency is required.
4
2. Application to Various Oscillation Circuits
Application to C-MOS Inverter
For the C-MOS inverting amplifier, the one-stage 4069
C-MOS group is best suited.
The C-MOS 4049 type is not used, because the three-
stage buffer type has excessive gain, which causes RC
oscillation and ringing.
Murata employs the TOSHIBA TC4069UBP as a
C-MOS standard circuit. This circuit is shown in
Fig. 4-2. The oscillation frequency of the standard
CERALOCK^® (C-MOS specifications) is adjusted by the
circuit in Fig. 4-2.
VDD
14
IC:TC4069UBP(TOSHIBA)
1
23
4
Rf
CERALOCK^® Rd
CL1
CL2
7
Output
Item
Circuit Constant
Frequency Rage
VDD
Part Number
CL1
CL2
Rf
Rd
CSTLS˘G53
3.40—10.00MHz
+5V (15pF) (15pF)
1MΩ
0
Fig. 4-2 C-MOS Standard Circuit
18