SAW Components
Data Sheet R 728
SAW Components
Resonator
Data Sheet
R 728
345,00 MHz
Ceramic package
QCC8C
Features
s
1-port resonator
s
Provides reliable, fundamental mode, quartz fre-
quency stabilization i.e. in transmitters or local
oscillators
Terminals
s
Ni, gold plated
Dimensions in mm, approx. weight 0,1 g
Pin configuration
2
6
4,8
1,3
5,7
Input
Output, grounded in 1-port conf.
Ground (case)
float
float / ground
Type
R 728
Ordering code
B39351-R 728-U310
Marking and Package
according to
C61157-A7-A56
Packing
according to
F61074-V8070-Z000
Electrostatic Sensitive Device
(ESD)
Maximum ratings
Operable temperature range
Storage temperature range
DC voltage
Source power
T
A
T
stg
V
DC
P
s
–45/+85
–45/+85
12
0
˚C
˚C
V
dBm
between any terminals
2
May 09, 2001
SAW Components
Resonator
Data Sheet
Characteristics
Reference temperature:
Terminating source impedance:
Terminating Load impedance:
R 728
345,00 MHz
T
A
= 25 ˚C
Z
S
= 50
Ω
Z
L
= 50
Ω
min.
typ.
345,00
1,2
15200
—
1,994
106,73
15
2,9
– 0,03
—
max.
345,07
1,8
—
±
50
—
—
25
—
—
45
ppm
fF
µH
Ω
pF
ppm/K
2
˚C
MHz
dB
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)
Temperature coefficient of frequency
3)
Turnover temperature
1)
Center
2)
If
f
c
α
min
344,93
—
9200
—
Q
U
C
1
L
1
R
1
C
0
TC
f
T
0
—
—
—
—
—
15
frequency is defined as maximum of the real part of the admittance
dependence of
f
c
:
used in two port configuration (pin 2-input, pin 6-output)
C
0
is reduced by approx. 0,3 pF.
3)
Temperature
f
c
(T
A
) =
f
c
(T
0
)(1 +
TC
f
(T
A
–
T
0
)
2
)
3
May 09, 2001
SAW Components
Resonator
Data Sheet
R 728
345,00 MHz
Published by EPCOS AG
Surface Acoustic Wave Components Division, SAW CE AE PD
P.O. Box 80 17 09, D-81617 München
©
EPCOS AG 2001. All Rights Reserved.
As far as patents or other rights of third parties are concerned, liability is only assumed for compo-
nents per se, not for applications, processes and circuits implemented within components or
assemblies.
The information describes the type of component and shall not be considered as assured
characteristics.
Terms of delivery and rights to change design reserved.
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.
4
May 09, 2001
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