• 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. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering.
P17E.pdf
2015.12.25
Introduction
Ceramic resonators (CERALOCK
®
) are made of high
stability piezoelectric ceramics that function as a
mechanical resonator.
This device has been developed to function as a
reference signal generator and the frequency is
primarily adjusted by the size and thickness of the
ceramic element.
With the advance of the IC technology, various
equipment may be controlled by a single
L S I i n te g ra te d c i rc u i t , s u c h a s t h e o n e - c h i p
microprocessor.
CERALOCK
®
can be used as the timing element in
most microprocessor based equipment.
In the future, more and more applications will use
• 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. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering.
P17E.pdf
2015.12.25
Contents
Product specifications are as of
December 2015.
1
2
1
Characteristics and Types of CERALOCK
®
1. General Characteristics of CERALOCK
®
……
2. Types of CERALOCK
®
……………………………
MHz Band lead CERALOCK
®
(CSTLS Series)
………………
MHz Band Chip CERALOCK
®
p2
p3
p3
p4
3
(CSACW/CSTCC/CSTCR/CSTCE/CSTCW Series)
…………
2
Principles of CERALOCK
®
1. Equivalent Circuit Constants
……………………
2. Basic Oscillation Circuits
………………………
3
Specifications of CERALOCK
®
p6
p9
4
1. Electrical Specifications
…………………………
Electrical Specifications of MHz Band Lead CERALOCK
Electrical Specifications of MHz Band Chip CERALOCK
®
p12
p12
p14
p15
(CSTLS Series)
……………………………………………
®
5
(CSACW Series) (CSTCC/CSTCR/CSTCE/CSTCW Series)
…
2. Mechanical and Environmental
Specifications of CERALOCK
®
……………………
4
Applications of Typical Oscillation Circuits
6
p17
p18
p18
p19
1. Cautions for Designing Oscillation Circuits
…
2. Application to Various Oscillation Circuits
…
Application to C-MOS Inverter
……………………
Application to H-CMOS Inverter
…………………
7
5
Characteristics of CERALOCK
®
Oscillation Circuits
p20
1. Stability of Oscillation Frequency
……………
p21
2. Characteristics of the Oscillation Level
………
3. Characteristics of Oscillation Rise Time
……
…
4. Starting Voltage
…………………………………
6
Application Circuits to Various ICs/LSIs
p22
p23
8
1. Application to Microcomputers
………………
2. Application to Remote Control ICs
……………
3. Application to ICs for Office Equipment
……
4. Other Kinds of Applications to Various ICs
…
7
Notice
…………………………………………………
8
Appendix
p24
p27
p27
p27
p28
Equivalent Circuit Constants of CERALOCK
®
……
p29
Please check the MURATA website
(http://www.murata.com/)
if you cannot find the part number in the catalog.
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. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering.
P17E.pdf
2015.12.25
1
1
Characteristics and Types of CERALOCK
1. General Characteristics of CERALOCK
®
Ceramic resonators use the mechanical resonance of
piezoelectric ceramics. (Generally, lead zirconium titanate:
PZT.)
The oscillation mode varies with resonant frequency.
The table on the right shows this relationship.
As a resonator device, Crystal Unit is well-known. RC
oscillation circuits and LC oscillation circuits are also used
to produce electrical resonance. The following are the
characteristics of CERALOCK
®
.
①
High stability of oscillation frequency:
Oscillation frequency stability is between that of Crystal
Units and LC or RC oscillation circuits.
The temperature coefficient of Crystal Units is 10–6/
°
C
C
maximum and approximately 10–3 to 10–4/
°
for LC or
C
RC oscillation circuits. For comparison these, it is 10–5/
°
C
at –20 to +80
°
for ceramic resonators.
②
Small configuration and light weight:
The ceramic resonator is half the size of popular Crystal
Units.
③
Low price, non-adjustment:
CERALOCK
®
is mass produced, resulting in low cost and
high stability.
Unlike RC or LC circuits, ceramic resonators use
mechanical resonance. This means it is not basically
affected by external circuits or by the fluctuation of the
supply voltage.
Highly stable oscillation circuits can therefore be made
without the need of adjustment.
The table briefly describes the characteristics of various
oscillator elements.
Vibration Mode and Frequency Range
Frequency (Hz)
Vibration Mode
1
Flexural
mode
2
Length
mode
3
Area
expansion
mode
4
Radius
vibration
5
Shear
thickness
mode
6
Thickness
expansion
mode
7
Surface
acoustic
wave
®
RoHS
1k
10k 100k 1M 10M 100M 1G
[Note] :
←→
show the direction of vibration
Characteristics of Various Oscillator Elements
Name
Symbol
Price
Size
Oscillation Long-
Adjust- Frequency
term
Initial
ment
Tolerance Stability
LC
lower
cost
Big
Required
±
2.0
％
Fair
CR
lower
cost
Small
Required
±
2.0
％
Fair
Crystal
Unit
Expen-
sive
Big
Not
±
Excellent
required 0.001
％
Ceramic
Resonator
Inexpen-
sive
Small
Not
required
±
0.5
％
Excellent
2
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. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering.
P17E.pdf
2015.12.25
1
2.TypesofCERALOCK®
MHz Band lead CERALOCK
®
(CSTLS Series)
As CSTLS series does not require externally mounted capac-
itors, the number of components can be reduced, allowing
circuits to be made more compact.
The table shows the frequency range and appearance of the
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