Design and specifi cations are each subject to change without notice. Ask factory for the current technical specifi cations before purchase and/or use.
Should a safety concern arise regarding this product, please be sure to contact us immediately.
Ceramic Resonators, Chip Type
– EC175 –
Ceramic Resonators, Chip Type. Type S/B/SS/SM/BM/JM
(3 Array Type)
Ceramic Resonators, Chip Type. Type P/D/PS/PM/DM/LM
(2 Array Type)
Handling Precautions
■Design Engineering Notes
1Fail-Safe Design for Equipment
When using The Ceramic Resonators, it is rec om -
mended that you build a protective failsafe circuit
into your de sign to prevent equipment damage in the
event that the resonator malfunctions or fails.
2Operating Temperature Ranges
The Ceramic Resonators should not be operated
beyond the “Operating Temperature Range” speci-
fi ed in the catalog.
3Changes/Drifts in Oscillating Frequency
Oscillating frequency may drift depending upon the
controlling IC and/or external capacitors C1
✽ and
C2
✽ used in the circuit design.
Note: ✽Refer to “Standard Test Circuit Diagram” in the catalog or
the individual specifi cation.
4Abnormal Oscillation
The Ceramic Resonators are always accompanied
by spurious resonances. Spurious oscillations or
stoppage of oscillation may occur depending on the
circuit design (IC used, frequency characteristics
of the IC, supply voltage etc.) and/or environmental
conditions. These factors should be taken into
consideration when designing the circuit.
5Stray Capacitance
Stray capacitances and insulation resistances on
printed circuit boards may cause abnormal oscillation
or stoppage of oscillation. These factors should be
taken into consideration when designing the circuit.
6Matching Capacitors
When using The Ceramic Resonators of Type PM
and LM/P/D/PS/DM, two selected capacitors✽✽
should be added for constructing “Colpitts Oscillation
Circuit”.
Note: ✽✽ The capacitance values are specifi ed in the catalog.
■Prohibited Applications
1“
Flow Soldering” should not be used to solder ceramic
resonators.
2“Ultrasonic Cleaning” and “Ultrasonic Welding”
should not be used on ceramic resonators.
3Avoid washing in water because it could deteriorate
the resonator's performance characteristics.
4Avoid resin coating or potting for humidity protection
because it could deteriorate the resonator's
performance characteristics.
■ Application Notes
1Overvoltage Spikes & Electrostatic Discharges
Voltage spikes and electrostatic discharges may cause
damage/malfunction or failures of the resonators.
2Abnormal Mechanical Stresses
Abnormal/excess mechanical stresses such
as vibration or shock should be avoided when
handling/storing res o na tors to prevent damage and
cracking.
3Surface Mounting Consideration
In automated mounting of The Ceramic Resonators
on printed circuit boards, any bending, expanding
and pulling forces or shocks to The Ceramic Reso-
nators should be kept to a minimum to prevent
electricalfailures and/or mechanical damage to the
devices.
01 Feb. 2009
Design and specifi cations are each subject to change without notice. Ask factory for the current technical specifi cations before purchase and/or use.
Should a safety concern arise regarding this product, please be sure to contact us immediately.
Ceramic Resonators, Chip Type
– EC176 –
Peak Temp.:
250 °C max.
gradual
cooling
20 sec max.
60 to 120 sec
250
220
175
Time (sec)
Temperature (°C)
Soldering Zone
Preheating Zone
4Soldering (Refl ow)
(1) Follow the soldering instructions given in the
ceramic data sheet specifi cations.
(2) Th e Ce r ami c Re son at ors are designed for
“Reflow Soldering”
(3) Too high of a soldering temperature and/or too
large of a temperature gradient, such as rapid
heating or cooling, may cause electrical failure
and/or mechanical damage.
5Soldering Flux
Product performance may be affected by fl ux residue,
which may result in deterioration or failure or the
ceramic resonator.
6Post Soldering Cleaning
Liquid cleaning is prohibited.
7Operating and Storage Conditions
The Ceramic Resonators should not be operated
and/or stored under the following environmental
conditions;
a) Direct exposure to water or salt water
b) Direct exposure to sunlight
c) Under conditions of dew formation
d) Corrosive atomospheres such as hydrogen
sulfi de, sulfuric acid, chlorine and ammonia
8Long Term Storage
The Ceramic Resonators should not be stored
under severe conditions of high temperatures
and high humidities.
Store them indoors under 40 °C max. and 75 %
RH max. Use them within one year and check
the solderability before use.
Fig. 1 Recommended Soldering Temperature-Time
profi le (Refl ow Soldering)
• Preheating: 175 °C for 60 to 120 seconds
• Soldering Temperature: 220 °C for 20 seconds
max.
• Peak Soldering Temperature: 250 °C max.
00 Sep. 2008
