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Электронный компонент: OC2541EH-xxxx

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OSCILLATOR PRODUCTS
CATALOG
O-20-A
Please visit our website
www.murata.com
Introduction and Standards ..........................................................................................................1-4
RFQ Form/Quick Quote...................................................................................................................5
Part Numbering System ..................................................................................................................6
Temperature Compensating High Stability Crystal Oscillators ...........................................712
Voltage Controlled Oscillators...........................................................................................1318
Ovenized Crystal Oscillators.............................................................................................1925
Surface Mount Crystal Oscillators ....................................................................................2628
Digitally Compensated Crystal Oscillators ..............................................................................29
Microwave Oscillators VCO ...........................................................................................3031
Phase Lock Loop Modules ...............................................................................................3233
If you have any questions concerning Crystal Oscillator products
please contact:
Murata Electronics N.A., Inc.
State College Operations
1900 West College Avenue
State College, PA 16801-2799
Phone: 814-237-1431
Fax: 814-238-0490
CONTENTS
1
Precision Oscillators / Frequency Control Devices
Quality Control
Murata Electronics' Quality
Control Department maintains
product quality at a level equal to
the company's high standards of
performance and workmanship,
which are certified to ISO-9001
and ISO-14000 requirements.
The department is vested
with the authority to exercise
control over every phase of
the manufacturing process.
This control extends from
incoming inspection of
purchased material to
in-process inspection,
inspection of final product,
packaging and shipping.
Product quality is guaranteed by our
Quality Assurance Program. Many
oscillators are custom designed to
meet your needs.
Standard oscillator design parameters are:
Storage Temperature: 55C to +85C
(to +125C Optional)
Vibration: 10G's, 10 to 500Hz
MIL-STD-202, Method 204
Shock:
Test condition A
30g, 11msec.,
1
/
2
sine
MIL-STD-202, Method 213,
Test Condition J
Altitude: Sea Level to space per
MIL-STD-202, Method 105
Seal:
MIL-STD-202, Method 112
Test Condition D
More stringent specification levels are
available. Consult our factory for details.
Other environmental conditions
encountered by oscillators should
be specified so that we may design
units to meet your requirements.
Such conditions would include soldering
profiles, board washing, exposure to
moisture, corrosive atmospheres,
solvents, etc.
Standard environmental tests are
conducted on site in the Corporate QA
laboratory. Specialized environmental
tests are conducted at independent
testing laboratories.
Environmental Testing
2
Introduction and Standards
Precision Oscillators / Frequency Control Devices
MURATA ELECTRONICS MANUFACTURES
A COMPLETE LINE OF OSCILLATORS
We are a volume producer of TTL, CMOS, ECL and Sine Wave Clock
Oscillators for the instrumentation and communication industries. Excellent
frequency stability is achieved with TCXO, Temperature Compensated
Crystal Oscillators and OCXO, Ovenized (Proportional Control) Crystal
Oscillators. Special requirements are met with VCXO, Voltage Controlled
Crystal Oscillators, which can be frequency modulated, with combinations
of the basic types such as the TC/VCXO or OC/VCXO. Murata has full-line
expertise from economy models to sophisticated, high stability, very low
phase noise oscillators that are used as standards for microwave
transmitters. Our oscillator production lines are closely monitored by
Quality Control through Incoming, In-Process and Final Inspections.
The Crystal Oscillators featured in this catalog are manufactured
exclusively at our manufacturing facility in State College, PA and are
designed to meet the requirements of most high technology market
applications today. However, oscillators can be custom designed to
meet your needs. Send us your specifications. We have full-line
capability backed by a well staffed engineering department. Murata
will assist you in defining your oscillator requirements and provide
the support to take your project from the conceptual stage through
implementation, including fast prototype turnaround.
OSCILLATOR TECHNICAL PERFORMANCE
If you have a formal specification, send us a copy for quotation. If not,
make a copy of our Specification and RFQ Form to help you specify an
oscillator to meet your requirements. Select those specifications relevant
to your application; cost increases as electrical and mechanical
requirements become more stringent. Murata Electronics will produce a
cost effective product which will meet all of your oscillator requirements.
Since tradeoffs exist in many instances, we are always happy to quote
options when cost/performance or cost/size tradeoffs exist.
Attach additional sheets to our specification sheet if necessary.
3
Introduction and Standards
Precision Oscillators / Frequency Control Devices
The following material briefly describes our in-house
standards and offers some cost/performance tradeoffs.
ENVIRONMENTAL CONDITIONS
See Page 1.
FREQUENCY RANGE
From less than 1Hz to 1GHz, Murata Electronics designs
typically center around the "AT" cut crystals,
but "SC," "IT," and other cuts are used for certain
applications. Fundamental mode crystals from 3MHz
and overtones from 5 to 400MHz are utilized in the
oscillators. This range is extended through the use of
dividers and multipliers. (Oscillators in the microwave
range are available through the Murata RF and
Microwave Products Group in State College,
Pennsylvania.)
FREQUENCY STABILITY
ls generally defined in two ways:
1.0 Total Frequency Stability the maximum frequency
excursion from the nominal for all conditions. This is
usually expressed as a fraction centered at the
nominal frequency.
FREQUENCY STABILITY [ppm]
f [Hz]
2.0 Specific Stabilities
f
c
[MHz]
2.1 Accuracy the frequency setting tolerance at
room temperature at time of shipment.
Oscillators may incorporate external
adjustments for exact calibration. TCXO's
typically exhibit a resolution of 1pp 10
7
. For
OCXO's, the typical resolution is to 1pp 10
9
.
2.2 Frequency Stability Versus Temperature a
maximum change from the nominal frequency.
Oscillators relying on the temperature
characteristics of the "AT" crystal can be
designed to meet a stability requirement as
tight as 10ppm from 10C to +60C. Tighter
stabilities to 0.1ppm require temperature
compensation techniques. Ovenized oscillators
are used for stabilities to 5pp 10
10
.
2.3 Frequency Stabilities Versus Supply Voltage
and Load Variation these parameters may be
improved by the use of voltage regulation and
additional buffer stages. The tighter the stability
requirements, the more complex
the design.
2.4 Stability Versus Time can be expressed over
periods of milliseconds to years. Through use
of high quality crystals typical aging rates of
1ppm/year are achieved. For OCXO's, it is
possible to achieve aging rates as low as
5pp 10
10
per day. Short term stability can be
expressed as an Allan Variance over a range
of gate times from less than 1msec to 10sec,
or in terms of SSB phase noise in the frequency
domain.
OUTPUT CHARACTERISTICS
Oscillator output waveforms are either sine or square
waves.
1.0 Sine Waves outputs are specified by stating the
amplitude of the signal (mW or V
RMS
and the
nominal load impedance (typically) 50 ohms or
1K ohms).
Harmonic and Sub-Harmonic distortion less than 20dBc
is standard.
Deviations from the standards can be accommodated.
Consult our engineering department.
2.0 Square Wave*
TTL
CMOS
ECL
Logic "0" Level
0.4V Max.
1.0V Max.
1.89V
Logic "1" Level
2.4V Min.
Vcc 1.0V
0.89
Symmetry
40/60
40/60
40/60
50 ohms
Load
10 Gates
50pF Max.
to 2VDC
1Hz to
1Hz to
4.0MHz to
Freq. Range
100MHz
100MHz
700MHz
*Specify logic type to be driven
RELATIVE FREQUENCY STABILITY OF TYPICAL
CRYSTAL OSCILLATOR TYPES
+10ppm
0
10ppm
f/f
40C
+20C
+80C
Temperature
Uncompensated
"AT" Cut
Crystal Osc.
(XO)
Ovenized Crystal Oscillator
(OCXO)
Analog Temp.
Compensation
(TCXO)