SAW Components
SAW resonator
Data sheet
Characteristics
Reference temperature:
Terminating source impedance:
Terminating load impedance:
T
A
= 25 ˚C
Z
S
= 50
Ω
Z
L
= 50
Ω
min.
433.895
—
7800
—
C
1
L
1
R
1
C
0
T
0
—
—
—
—
—
10
typ.
433.920
1.5
11000
—
1.581
85.08
20
2.4
–0.032
—
max.
433.945
1.9
—
–50/+50
—
—
28
—
—
30
R990
433.92 MHz
Center frequency
1)
Minimum insertion attenuation
Unloaded quality factor
Ageing of f
C
Equivalent circuit elements
Motional capacitance
Motional inductance
Motional resistance
Parallel capacitance
2)
f
C
α
min
Q
U
MHz
dB
ppm
fF
µH
Ω
pF
ppm/K
2
˚C
Temperature coefficient of frequency
3)
TC
f
Turnover temperature
1)
2)
3)
Center frequency is defined as maximum of the real part of the admittance.
If used in two port configuration (pin 1 - input, pin 3 - output) C
0
is reduced by approx. 0.3 pF.
Temperature dependence of f
C
: f
C
(T
A
) = f
C
(T
0
) (1 + TC
f
(T
A
– T
0
)
2
)
Maximum ratings
Operable temperature range
Storage temperature range
DC voltage
Source power
T
T
stg
V
DC
P
S
–45/+125
–45/+125
12
0
˚C
˚C
V
dBm
Please read
cautions and warnings and
important notes
at the end of this document.
3
April 21, 2009
SAW Components
SAW resonator
Data sheet
R990
433.92 MHz
References
Type
Ordering code
Marking and package
Packaging
Date codes
Soldering profile
RoHS compatible
R990
B39431R 990H110
C61157-A7-A143
F61074-V8228-Z000
L_1126
S_6001
defined as compatible with the following documents:
"DIRECTIVE 2002/95/EC OF THE EUROPEAN PARLIAMENT
AND OF THE COUNCIL of 27 January 2003 on the restriction
of the use of certain hazardous substances in electrical and
electronic equipment. 2005/618/EC from April 18th, 2005,
amending Directive 2002/95/EC of the European Parliament
and of the Council for the purposes of establishing the maxi-
mum concentration values for certain hazardous substances in
electrical and electronic equipment."
For further information please contact your local EPCOS sales office or visit our webpage at
www.epcos.com .
Published by EPCOS AG
Surface Acoustic Wave Components Division
P.O. Box 80 17 09, 81617 Munich, GERMANY
©
EPCOS AG 2009. This brochure replaces the previous edition.
For questions on technology, prices and delivery please contact the Sales Offices of EPCOS AG or
the international Representatives.
Due to technical requirements components may contain dangerous substances. For information on
the type in question please also contact one of our Sales Offices.
Please read
cautions and warnings and
important notes
at the end of this document.
4
April 21, 2009
Important notes
The following applies to all products named in this publication:
1.
Some parts of this publication contain
statements about the suitability of our products for
certain areas of application.
These statements are based on our knowledge of typical
requirements that are often placed on our products in the areas of application concerned. We
nevertheless expressly point out
that such statements cannot be regarded as binding
statements about the suitability of our products for a particular customer application.
As a rule, EPCOS is either unfamiliar with individual customer applications or less familiar
with them than the customers themselves. For these reasons, it is always ultimately incum-
bent on the customer to check and decide whether an EPCOS product with the properties
described in the product specification is suitable for use in a particular customer application.
We also point out that
in individual cases, a malfunction of electronic components or
failure before the end of their usual service life cannot be completely ruled out in the
current state of the art, even if they are operated as specified.
In customer applications
requiring a very high level of operational safety and especially in customer applications in
which the malfunction or failure of an electronic component could endanger human life or
health (e.g. in accident prevention or life-saving systems), it must therefore be ensured by
means of suitable design of the customer application or other action taken by the customer
(e.g. installation of protective circuitry or redundancy) that no injury or damage is sustained
by third parties in the event of malfunction or failure of an electronic component.
The warnings, cautions and product-specific notes must be observed.
In order to satisfy certain technical requirements,
some of the products described in this
publication may contain substances subject to restrictions in certain jurisdictions (e.g.
because they are classed as hazardous).
Useful information on this will be found in our
Material Data Sheets on the Internet (www.epcos.com/material). Should you have any more
detailed questions, please contact our sales offices.
We constantly strive to improve our products. Consequently,
the products described in this
publication may change from time to time.
The same is true of the corresponding product
specifications. Please check therefore to what extent product descriptions and specifications
contained in this publication are still applicable before or when you place an order.
We also
reserve the right to discontinue production and delivery of products.
Conse-
quently, we cannot guarantee that all products named in this publication will always be avail-
able. The aforementioned does not apply in the case of individual agreements deviating from
the foregoing for customer-specific products.
Unless otherwise agreed in individual contracts,
all orders are subject to the current ver-
sion of the “General Terms of Delivery for Products and Services in the Electrical
Industry” published by the German Electrical and Electronics Industry Association
(ZVEI).
The trade names EPCOS, BAOKE, Alu-X, CeraDiode, CSMP, CSSP, CTVS, DSSP, MiniBlue,
MKK, MLSC, MotorCap, PCC, PhaseCap, PhaseCube, PhaseMod,
SIFERRIT, SIFI, SIKOREL, SilverCap, SIMDAD, SIMID, SineFormer, SIOV, SIP5D, SIP5K,
ThermoFuse, WindCap are
trademarks registered or pending
in Europe and in other coun-
tries. Further information will be found on the Internet at www.epcos.com/trademarks.
2.
3.
4.
5.
6.
7.
5
April 21, 2009
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