SAW Components
Data Sheet R 851
SAW Components
Resonator
Data Sheet
R 851
315,02 MHz
Ceramic package
QCC4A
Features
s
1-port resonator
s
Provides reliable, fundamental mode, quartz fre-
1,2
1
quency stabilization i.e. in transmitters or local
oscillators
Terminals
s
Ni, gold plated
0,8
4
3
0,5
3,5
1,45
5,0
Dimensions in mm, approx. weight 0,1 g
Pin configuration
C1
1
3
2,4
Input
Output, grounded in 1-port conf.
Ground (case)
R1
L1
C0
1
3
Type
R 851
Ordering code
B39321-R 851-H210
Marking and Package
according to
C61157-A7-A86
Packing
according to
F61074-V8120-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
–40/+125
–40/+125
12
0
˚C
˚C
V
dBm
between any terminals
2
Aug 21, 2002
2
SAW Components
Resonator
Data Sheet
Characteristics
Reference temperature:
Terminating source impedance:
Terminating load impedance:
R 851
315,02 MHz
T
A
= 25 ˚C
Z
S
= 50
Ω
Z
L
= 50
Ω
min.
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
typ.
315,02
1,3
13200
—
2,47
103,34
15
3,2
–0,032
35
max.
315,07
1,6
—
–10/+50 ppm
—
—
20
—
—
45
fF
µH
Ω
pF
ppm/K
2
˚C
MHz
dB
f
c
α
min
314,97
—
8300
—
Q
U
C
1
L
1
R
1
C
0
TC
f
T
0
—
—
—
—
—
25
frequency is defined as maximum of the real part of the admittance
dependence of
f
c
:
used in two port configuration (pin 1-input, pin 3-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
Aug 21, 2002
SAW Components
Resonator
Data Sheet
R 851
315,02 MHz
Published by EPCOS AG
Surface Acoustic Wave Components Division, SAW CE AE
P.O. Box 80 17 09, 81617 Munich, GERMANY
©.EPCOS
AG 2002. Reproduction, publication and dissemination of this brochure and the informa-
tion contained therein without EPCOS’ prior express consent is prohibited.
Purchase orders are subject to the General Conditions for the Supply of Products and Services of
the Electrical and Electronics Industry recommended by the ZVEI (German Electrical and Electronic
Manufacturers’ Association), unless otherwise agreed.
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.
4
Aug 21, 2002
