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P36E.pdf 02.8.5
SAW Resonators
www..com
SURFACE ACOUSTIC WAVE RESONATORS
Murata Manufacturing Co., Ltd.
Cat.No.P36E
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P36E.pdf 02.8.5
CONTENTS
Part Numbering Applications and Data of SAW Resonator SARCC Series
Oscillation Circuit Actual measurments of SAW Oscillator Keyless Entry System Packaging/Notice
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2 3 5 7 9 15 16
Recycled Paper
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P36E.pdf 02.8.5
o Part Numbering
SAW Resonators
the "Global Part Numbers" that have been adopted and the www..com ( The structure ofquestions about details, inquire at your usual Muratasince June 2001distributor.meaning of each code are described herein.) If you have any sales office or
(Global Part Number) qProduct ID Product ID SA wFunction Code R eStructure/Size Code CC rResonant Frequency
SA q
R w
CC e
433M92 r
B
X
M
0
R05 o yBoard Code Board Crystal
tyui
SAW
X uResonant Frequency Tolerance
Function Resonator
Code L M P
Resonant Frequency Tolerance 50kHz 75kHz 100kHz
Structure/Size Package (SC33 package) iCustomer Code Expressed by a figure. oPackaging Code Packaging 2000pcs. /o178mm Reel 5000pcs. /o330mm Reel
Expressed by six-digit alphanumerics. The unit is in hertz (Hz). A decimal point is expressed by the capital letter "M".
tDesign Code B Design 1 port
R12 R05
2
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P36E.pdf 02.8.5
Applications and Data ofwww..com SAW Resonator
s Application
SAW RESONATER has generally 2 types of 1-port type and 2-port type. 1-port SAW RESONATOR is basically a 2 terminal device and its application is similar to that of quartz bulk wave resonator or ceramic resonator. Most of the application circuit is Colpitts or similar type that can be made with low cost. 1-port SAW RESONATOR is also applicable to VCO (Voltage Controlled Oscillator) application. 2-port SAW RESONATOR is a kind of very narrow, low loss band-pass filter. Oscillation circuit is mostly like a RF amplifier with feedback loop. SARCC series is 1-port SAW RESONATOR. Later application data is oscillation circuit by 1-port SAW RESONATOR.
s Basic structure of 1-port SAW RESONATOR
1-port SAW RESONATOR has one IDT (Inter Digital Transducer), which generates and receives SAW, and two grating reflectors, which reflect SAW and generate a standing wave between the two reflectors. IDT and reflectors are fabricated on quartz crystal substrate by photolithographic process. Cut angle of the substrate shall be selected carefully. SAW RESONATOR chip is encapsuled in a ceramic package.
SAW IDT
REFLECTOR
s Test Circuit
Rg 3 2 1 S.S.G.
4 5 6 Ri RF Voltmeter V1
s Transmission Characteristics of 1-port SAW RESONATOR
SARCC315M00BXM0 SARCC433M92BXM0
0 10 Insertion Lose (dB)
Amplitude
0 10 Insertion Lose (dB) 20
Amplitude
20 5 dB/cm 30 40 50 60 70 314.50 314.70 314.90 315.10 Frequency (MHz) 315.30 Phase 180 Phase (deg) 90 0 90 180 315.50
5 dB/cm 30 40 50 60 70 433.42 433.62 433.82 434.02 Frequency (MHz) 434.22 Phase 180 Phase (deg) 90 0 90 180 434.42
Continued on the following page.
3
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*This catalog has only typical specifications. Therefore, you are requested to approve our product specification please approve our product specification or transact the approval sheet for product specification before ordering. This catalog has only typical specifications because there is no space for detailed specifications. Therefore, or to transact the approval sheet for product specificaion before ordering.
P36E.pdf 02.8.5
Applications and Data of SAW Resonator
Continued from the preceding page.
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s Temperature Characteristics of 1-port SAW RESONATOR
SARCC315M00BXM0 SARCC433M92BXM0
50
50
0 Frequency Drift (ppm) Frequency Drift (ppm)
0
-50
-50
-100
-100
-150
-150
-200 -60
-40
-20
0
20
40
60
80
100
120
-200 -60
-40
-20
0
20
40
60
80
100
120
Temperature (C)
Temperature (C)
4
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P36E.pdf 02.8.5
SAW Resonators
SARCC Series
www..com
1
3.0 0.2
SAW Resonator utilizes Surface acoustic Wave, and is able to be applied to high frequency circuit where conventional crystal, ceramic resonators are not available, as SAW Resonator oscillates stably with its fundamental mode over frequency range from 50 MHz to around 1 GHz. Murata SAW Resonator - SARCC series - has high stability, good temperature characteristics provided by quartz crystal substrate and is developed with SAW technology accumulated for SAW filters through Murata's long experience. SAW Resonator can be applied to many types of high frequency devices including RF remote controls, CATV FSK demodulators and CATV 2nd local oscillators.
Dot Marking(o0.5)
M
1.15max.
3.0 0.2
(0.20)
0.40.1
(3) (2) (1) 0.750.20 1.500.20
(4) (5) (6) 6-0.600.15
Marking : Laser Printing : EIAJ Code
Pin (2)(5) : Input Others : Ground
5-0.750.20 0.750.10 (in mm)
s Features
1. High Oscillation Frequency Stability Both initial tolerance and temperature coefficient of oscillating frequency of SAW Resonator are between quartz bulk resonator's and LC's / RC's. Temperature coefficient of oscillating frequency for quartz crystal : 10**-6/degree C, LC : 10**-3-10**-4/dgree C, while SAW Resonator : 5x10**-6/dgree C. (The number following ** means multiplier.) 2. Adjustment Free As SAW Resonator utilizes mechanical vibration of piezoelectric material, while LC/RC utilizes electrical resonance, oscillator using SAW Resonator is stable against peripheral circuit or supply voltage fluctuation, and is basically free from adjustment. 3. Simple/Low Cost Circuit by Fundamental Oscillation Multiplying circuit necessary for quartz bulk wave resonator is not required as SAW Resonator oscillates with its fundamental mode over the frequency range of 50 MHz to 1 GHz. Therefore, oscillation circuit is simple and low cost. 4. Quartz Crystal Substrate SARCC series realizes better temperature characteristics, higher stability against peripheral circuit, by utilizing quartz crystal substrate, compared to SAW Resonators with other materials. 5. Small Size Package SARCC series use small size ceramic package with 3.0x3.0x1.15mm. This is good for high density mount. 6. They can be applied Corpitts Oscillator circuit. 7. Components do not contain lead.
4-1.500.15
5
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*This catalog has only typical specifications. Therefore, you are requested to approve our product specification please approve our product specification or transact the approval sheet for product specification before ordering. This catalog has only typical specifications because there is no space for detailed specifications. Therefore, or to transact the approval sheet for product specificaion before ordering.
P36E.pdf 02.8.5
1
Part Number SARCC304M30BXL0 SARCC304M30BXM0 SARCC304M30BXP0 SARCC315M00BXL0 SARCC315M00BXM0 SARCC315M00BXP0 SARCC423M22BXL0 SARCC423M22BXM0 SARCC423M22BXP0 SARCC433M87BXL0 SARCC433M87BXM0 SARCC433M87BXP0 SARCC433M92BXL0 SARCC433M92BXM0 SARCC433M92BXP0 SARCC434M15BXL0 SARCC434M15BXM0 SARCC434M15BXP0
Resonant Loss (dB) 2.2 max. 2.2 max. 2.2 max. 2.2 max. 2.2 max. 2.2 max. 2.5 max. 2.5 max. 2.5 max. 2.5 max. 2.5 max. 2.5 max. 2.5 max. 2.5 max. 2.5 max. 2.5 max. 2.5 max. 2.5 max.
Resonant Frequency (MHz) 304.300 304.300 304.300 315.000 315.000 315.000 423.220 423.220 423.220 433.870 433.870 433.870 433.920 433.920 433.920 434.150 434.150 434.150
Parallel Capacitance (at 1MHz) www..com (pF) 2.4 2.4 2.4 2.4 2.4 2.4 2.1 2.1 2.1 2.1 2.1 2.1 2.1 2.1 2.1 2.1 2.1 2.1
Operating Temperature Range: -40 to +85 dgree C, Storage Temperature Range: -40 to +85 dgree C.
s Equivalent Circuit
L1 C1 R1
s Recommended Land Pattern
2.0 1.4
0.7
C0
Part Number SARCC304M30BX_0 SARCC315M00BX_0 SARCC423M22BX_0 SARCC433M87BX_0 SARCC433M92BX_0 SARCC434M15BX_0
L1 (H) 164.495 159.331 110.088 92.747 96.529 95.288
C1 (pF) 0.001663 0.001602 0.001284 0.001451 0.001394 0.00141
R1 () 22.0 22.0 22.2 20.2 22.1 20.0
C0 (pF) 2.37 2.25 2.00 2.00 2.112 1.97
0.7 0.6
4.0 (in mm)
6
1.25
1.25
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P36E.pdf 02.8.5
Oscillation Circuit
s Theory of Oscillation Circuit
Oscillation circuits using LC or quartz crystal are called 'Feedback Oscillators'. Feedback oscillator consists of an amplifier and a feedback circuit. The circuit oscillates, with no input signal applied from outside of the oscillator, when feedback signal from the output of the amplifier has the same amplitude and phase to the input signal. The conditions required to the feedback to enable oscillation are as follows; Amplitude : G = + U 0 [dB] Phase : = 1 + 2 = 360 x n [degree] (n: Natural number)
Oscillation Circuit www..com
1
Amplifier Gain: Phase delay:1
Feedback Circuit Gain: Phase delay:2
1-port SAW RESONATOR is a kind of two terminal resonant device utilizing piezoelectricity, like quartz crystal bulk wave resonator or ceramic resonator. The equivalent circuit of 1-port SAW RESONATOR is same to that of quartz or ceramic resonator, and therefore, impedance characteristics of SAW RESONATOR is as shown in Fig.1.
1. Fig. 1 Impedance Characteristics of 1-port SAW RESONATOR
SARCC315M00BXM0
Fr Cor Fa Cor
SARCC433M92BXM0
Fr Fa
Hid
Hid
Cor
Cor
Hid CENTER 315.000 000 MHz SPAN 1.000 000MHz
Hid CENTER 433.920 000 MHz SPAN 1.000 000MHz
2. Basic Structure of Corpitts Oscillator
Colpitts is one of the popular oscillation circuits. Basic structure of Colpitts oscillator is as shown in Fig.2. The oscillating frequency is approximately same to resonant frequency of L, CL1 and CL2. fosc = 1 / (2 ( L x CL1 x CL2 / ( CL1 + CL2 ))1/2)
Fig. 2. Corpitts Oscillator Circuit.
CL1
CL2
L
Continued on the following page.
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P36E.pdf 02.8.5
1
Oscillation Circuit
Continued from the preceding page.
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3. Example of 1-port SAW Oscillator
In the case of an oscillation circuit using piezo resonator, the inductor in Fig.2 can be replaced by the resonator because its impedance is inductive between fr (impedance minimum) and fa (impedance maximum) as shown in Fig.1. Fig.3 shows an example of oscillation circuit using 1-port SAW RESONATOR. Rb1 and Rb2 are for DC bias. Re is a load impedance. Cd is for power line de-coupling. CL1 and CL2 are load capacitance to satisfy oscillation conditions. Values of CL1 and CL2 must be evaluated to get desired oscillating frequency. Transistor shall be a high frequency type - fT a few GHz or more. SMT type transistor, resistor, capacitor are recommended for application more than 100 MHz due to the inductance of the lead terminals.
Fig. 3. 1-port SAW Oscillator Circuit
Vcc
Rb2
Cd Tr CL1 Co Out
SAW Rb1 CL2 Re
8
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P36E.pdf 02.8.5
Actual Measurements of SAW Oscillator Actual measurments of SAW Oscillator www..com
s 315 MHz 1-port SAW Oscillator
Fig.4 shows an example of oscillator with 1-port SAW RESONATOR. Here, transistor is 2SC4228(NEC), SAW RESONATOR is SARCC315M00BXL0 (315.00 MHz resonator). Supply voltage (Vcc) characteristics and temperature characteristics are shown in Fig.6. CL1, CL2, Co and Re characteristics are shown in Fig. 7 ti Fig. 10. Tr: 2SC4228 SAW: SARCC315M00BXL0 Rb1=Rb2=2k Re=160 CL1=12pF GRM18821CH120JA01B CL2=8pF GRM1882C2D8RDV01B Co=2pF GRM1884C1H2R0CZ01B Fig. 4 Oscilltor Circuit
Vcc
1
Fig. 5 Land Pattern
Output
Rb2
Cd 0 20mm Tr CL1 Co Out
Co CL2 Tr Vcc Rb2 0 Cd SC SAW Re CL1 Rb1
SAW Rb1 CL2 Re
25mm
1. Fig. 6 Vcc Characteristics
Frequency Output Power
315.020 -40C 315.000 f0 (MHz)
0 -40C -5 0C P0 (dBm) 25C 60C -10 -15 -20 -25 0 2 4 Vc (V) 6 8 0 2 4 Vc (V) 6 8 0C 25C 60C 85C
314.980
314.960
85C
314.940
Current Consumption
Rise Time
20 -40C 15 Ic (mA)
1000 -40C 800 0C t (us) 25C 60C 600 400 200 0 0 2 4 6 8 0 2 4 6 8 0C 25C 60C 85C
10
5
85C
0
Continued on the following page.
9
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*This catalog has only typical specifications. Therefore, you are requested to approve our product specification please approve our product specification or transact the approval sheet for product specification before ordering. This catalog has only typical specifications because there is no space for detailed specifications. Therefore, or to transact the approval sheet for product specificaion before ordering.
P36E.pdf 02.8.5
1
Measurements of SAW Oscillator Actual measurments of SAW Oscillator
Continued from the preceding page.
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2. Fig. 7 CL1 Characteristics
Frequency
315.030 315.025 -15 315.020 P0 (dBm) f0 (MHz) 315.015 315.010 -25 315.005 315.000 6 8 10 CL1 (pF) 12 14 16 -30 6 8 10 CL1 (pF) 12 14 16 -20 -10
Output Power
Current Consumption
8 7 1500 6 Ic (mA) t (us) 5 4 500 3 2 6 8 10 CL1 (pF) 12 14 16 0 6 8 1000 2000
Rise Time
10 CL1 (pF)
12
14
16
3. Fig. 8 CL2 Characteristics
Frequency
315.030 315.025 -15 315.020 P0 (dBm) f0 (MHz) 315.015 315.010 -25 315.005 315.000 4 6 8 CL2 (pF) 10 12 14 -30 4 6 8 CL2 (pF) 10 12 14 -20 -10
Output Power
Current Consumption
8 7 1500 6 Ic (mA) t (us) 5 4 500 3 2 4 6 8 CL2 (pF) 10 12 14 0 4 6 1000 2000
Rise Time
8 CL2 (pF)
10
12
14
Continued on the following page.
10
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*This catalog has only typical specifications. Therefore, you are requested to approve our product specification please approve our product specification or transact the approval sheet for product specification before ordering. This catalog has only typical specifications because there is no space for detailed specifications. Therefore, or to transact the approval sheet for product specificaion before ordering.
P36E.pdf 02.8.5
Actual Measurements of SAW Oscillator Actual measurments of SAW Oscillator www..com
Continued from the preceding page.
1
4. Fig. 9 Co Characteristics
Frequency
315.030 315.025 -15 315.020 P0 (dBm) f0 (MHz) 315.015 315.010 -25 315.005 315.000 0 1 2 Co (pF) 3 4 5 -30 0 1 2 Co (pF) 3 4 5 -20 -10
Output Power
Current Consumption
8 7 1500 6 Ic (mA) 5 4 500 3 2 0 1 2 Co (pF) 3 4 5 0 0 1 t (us) 1000 2000
Rise Time
2 Co (pF)
3
4
5
5. Fig. 10 Re Characteristics
Frequency
315.030 315.025 -15 315.020 P0 (dBm) f0 (MHz) 315.015 315.010 -25 315.005 315.000 0 150 Re (ohm) 200 250 -30 100 150 Re (ohm) 200 250 -20 -10
Output Power
Current Consumption
8 7 1500 6 Ic (mA) 5 4 500 3 2 100 150 Re (ohm) 200 250 0 100 t (us) 1000 2000
Rise Time
150 Re (ohm)
200
250
Continued on the following page.
11
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P36E.pdf 02.8.5
1
Measurements of SAW Oscillator Actual measurments of SAW Oscillator
Continued from the preceding page.
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s 433.92 MHz 1-port SAW Oscillator
Fig. 11 shows an example of oscillator with 1-port SAW RESONATOR. Here, transistor is 2SC4228(NEC), SAW RESONATOR is SARCC433M92BXM0 (433.92 MHz resonator). Supply voltage (Vcc) characteristics and temperature characteristics are shown in Fig. 13. Tr: 2SC4228 SAW: SARCC433M92BXM0 Rb1=Rb2=2k Re=160 CL1=10pF GRM1882C1H100JA01B CL2=8pF GRM1882C1H8RD201B Co=2pF GRM1884C1H2R0CZ01B Fig. 11 Oscillator Circuit
Vcc
Fig. 12 Land Pattern
Output
Rb2
Cd 0 20mm Tr CL1 Co Out
Co CL2 Tr Vcc Rb2 0 Cd SC SAW Re CL1 Rb1
SAW Rb1 CL2 Re
25mm
1. Fig. 13 Vcc Characteristics
Frequency Output Power
434.100 -40C 434.050 0C 434.000 P0 (dBm) f0 (MHz) 433.950 433.900 433.850 433.800 0 2 4 Vc (V) 6 8 25C 60C 85C
0 -5 -10 -15 -20 -25 85C -30 -35 0 2 4 Vc (V) 6 8 -40C 0C 25C 60C
Current Consumption
Rise Time
20 -40C 15 Ic (mA)
500 -40C 400 0C t (us) 25C 60C 300 200 100 0 0 2 4 Vc (V) 6 8 0 2 4 Vc (V) 6 8 0C 25C 60C 85C
10
5
85C
0
Continued on the following page.
12
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*This catalog has only typical specifications. Therefore, you are requested to approve our product specification please approve our product specification or transact the approval sheet for product specification before ordering. This catalog has only typical specifications because there is no space for detailed specifications. Therefore, or to transact the approval sheet for product specificaion before ordering.
P36E.pdf 02.8.5
Actual Measurements of SAW Oscillator Actual measurments of SAW Oscillator www..com
Continued from the preceding page.
1
2. Fig. 14 CL1 Characteristics
Frequency
434.040 434.035 -15 434.030 P0 (dBm) f0 (MHz) 434.025 434.020 -25 434.015 434.010 4 6 8 10 CL1 (pF) 12 14 16 -30 4 6 8 10 CL1 (pF) 12 14 16 -20 -10
Output Power
Current Consumption
8 7 6 Ic (mA) 600 5 4 3 2 4 6 8 10 CL1 (pF) 12 14 16 200 t (us) 1000
Rise Time
800
400
0 4 6 8 10 CL1 (pF) 12 14 16
3. Fig. 15 CL2 Characteristics
Frequency
434.030 434.025 -15 434.020 P0 (dBm) f0 (MHz) 434.015 434.010 -25 434.005 434.000 4 6 8 CL2 (pF) 10 12 14 -30 4 6 8 CL2 (pF) 10 12 14 -20 -10
Output Power
Current Consumption
8 7 6 Ic (mA) 600 5 4 3 2 4 6 8 CL2 (pF) 10 12 14 200 t (us) 1000
Rise Time
800
400
0 4 6 8 CL2 (pF) 10 12 14
Continued on the following page.
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*This catalog has only typical specifications. Therefore, you are requested to approve our product specification please approve our product specification or transact the approval sheet for product specification before ordering. This catalog has only typical specifications because there is no space for detailed specifications. Therefore, or to transact the approval sheet for product specificaion before ordering.
P36E.pdf 02.8.5
1
Measurements of SAW Oscillator Actual measurments of SAW Oscillator
Continued from the preceding page.
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4. Fig. 16 Co Characteristics
Frequency
434.030 434.025 -15 434.020 P0 (dBm) f0 (MHz) 434.015 434.010 -25 434.005 434.000 0 1 2 Co (pF) 3 4 5 -30 0 1 2 Co (pF) 3 4 5 -20 -10
Output Power
Current Consumption
8 7 6 Ic (mA) 600 5 4 3 2 0 1 2 Co (pF) 3 4 5 200 t (us) 1000
Rise Time
800
400
0 0 1 2 Co (pF) 3 4 5
5. Fig. 17 Re Characteristics
Frequency
434.030 434.025 -15 434.020 P0 (dBm) f0 (MHz) 434.015 434.010 -25 434.005 434.000 0 150 Re (ohm) 200 250 -30 100 150 Re (ohm) 200 250 -20 -10
Output Power
Current Consumption
8 7 6 Ic (mA) 600 5 4 3 2 100 150 Re (ohm) 200 250 200 t (us) 1000
Rise Time
800
400
0 100 150 Re (ohm) 200 250
14
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P36E.pdf 02.8.5
Keyless Entry System
RF remote control transmitter and reciver for automotive security device is getting popular. MURATA SARCC series are suitable for this application due to the advantage of adjustment-free (or easy adjustment) and high stability. Example of application circuit is shown in Fig.18 and Fig.19.
Keyless Entry System www..com
Fig. 18 Transmitter Circuit
1
Oscillator Encoder
SAW Resonator (433.92MHz etc)
Fig. 19 Receiver Circuit
LNA
LNA DEMOD
SAW Filter
IF Filter
Oscillator
SAW Resonator (423.22MHz etc)
15
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P36E.pdf 02.8.5
1
Packaging/Notice
1.750.10
www..com
4.00.1 2.00.1 o1.5 +0.1 -0.0
5.50.1
12.00.2
0.300.05 4.00.1 3 max. o1.5 +0.1 -0.0 Direction of Feed 1.250.10
Cover Tape
3.30.1 (in mm)
2.00.5
3 max.
2.00.5
13.00.5 (o178) 17.5 max. (o60)
3.30.1
(o100)
19.5 max.
o13.00.5
o13.00.5
o178 Reel Dimension
(in mm)
o330 Reel Dimension
(in mm)
s Notice (Handling)
1. Mount this component at the position so that stress by warp or bend of the PCB may not apply to it. 2. It might be a cause of destruction to apply excessive shock on mounting this component on PCB when positioning claw, pick-up nozzle, etc of component placement machine are abraded. Keep regular maintenance which is instructed on each machine to prevent from these kinds of troubles. 3. Mount all terminals, or terminal strength might be degraded. 4. Face this component to PCB.
16
(o330)
13.51.0
!Note Please read rating and !CAUTION (for storage and operating, rating, soldering and mounting, handling) in this PDF catalog to prevent smoking and/or burning, etc.
This catalog has only typical specifications. Therefore, you are requested to approve our product specification or to transact the approval sheet for product specificaion before ordering.
P36E.pdf 02.8.5
www..com
Note:
1. Export Control For customers outside Japan Murata products should not be used or sold for use in the development, production, stockpiling or utilization of any conventional weapons or mass-destructive weapons (nuclear weapons, chemical or biological weapons, or missiles), or any other weapons. For customers in Japan For products which are controlled items subject to the "Foreign Exchange and Foreign Trade Law" of Japan, the export license specified by the law is required for export.
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2. Please contact our sales representatives or product engineers before using our products listed in this catalog for the applications listed below which require especially high reliability for the prevention of defects which might directly cause damage to the third party's life, body or property, or when intending to use one of our products for other applications than specified in this catalog. q Aircraft equipment w Aerospace equipment e Undersea equipment r Power plant equipment t Medical equipment y Transportation equipment (vehicles, trains, ships, etc.) u Traffic signal equipment i Disaster prevention / crime prevention equipment o Data-processing equipment !0 Application of similar complexity and/or reliability requirements to the applications listed in the above 3. Product specifications in this catalog are as of May 2002. They are subject to change or our products in it may be discontinued without advance notice. Please check with our sales representatives or product engineers before ordering. If there are any questions, please contact our sales representatives or product engineers. 4. Please read rating and CAUTION (for storage and operating, rating, soldering and mounting, handling) in this catalog to prevent smoking and/or burning, etc. 5. This catalog has only typical specifications because there is no space for detailed specifications. Therefore, please approve our product specification or transact the approval sheet for product specification before ordering. 6. Please read CAUTION and Notice in this catalog for safety. This catalog has only typical specifications. Therefore you are requested to approve our product specification or to transact the approval sheet for product specification, before ordering. 7. Please note that unless otherwise specified, we shall assume no responsibility whatsoever for any conflict or dispute that may occur in connection with the effect of our and/or third party's intellectual property rights and other related rights in consideration of your using our products and/or information described or contained in our catalogs. In this connection, no representation shall be made to the effect that any third parties are authorized to use the rights mentioned above under licenses without our consent. 8. No ozone depleting substances (ODS) under the Montreal Protocol are used in our manufacturing process.
http://www.murata.com/
Head Office 2-26-10, Tenjin Nagaokakyo-shi, Kyoto 617-8555, Japan Phone: 81-75-951-9111 International Division 3-29-12, Shibuya, Shibuya-ku, Tokyo 150-0002, Japan Phone: 81-3-5469-6123 Fax: 81-3-5469-6155 E-mail: intl@murata.co.jp

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