303.875 MHz SAW Filter
Phone: +86 10 6301 4184 Fax: +86 10 6301 9167 Email: sales@vanlong.com Web: http://www.vanlong.com
© April 2004 by Vanlong Technology Co., Ltd. SF303M87
• Designed to Provide Front-end selectivity in 303.875 MHz
• Low-Loss, Coupled-Resonator Quartz Design
• Simple External Impedance Matching
• Rugged, Hermetic, Low Profile TO-39 Package
Absolute Maximum Rating (Ta=25°C)
Parameter Rating Unit
CW RF Power Dissipation P +10 dBm
DC Voltage VDC Between Any Two Pins V
DC
±30
V
Operating Temperature Range T
A
-10 ~ +60
°C
Storage Temperature Range T
stg
-40 ~ +85
°C
Electronic Characteristics
Parameter Sym Minimum Typical Maximum Unit
Nominal Frequency (at 25°C)
(Center frequency between 3dB point)
f
C
NS 303.875 NS MHz
Insertion Loss
IL
- 3.0 4.5 dB
3dB Passband BW
3
- 600 800 KHz
at f
C
- 21.4 MHz (Image)
- 40 50 - dB
at f
C
- 10.7 MHz (LO)
- 20 30 - dB
Rejection
Ultimate
- - 60 - dB
Operating Temperature Range
T
C
-10 - +60
°C
T urnover Temperature
T
O
25 - 55
°C
Turnover Frequency
f
O
- f
C
- MHz
Temperature Stability
Frequency Temperature Coefficient
FTC
- 0.032 - ppm/C
2
Frequency Aging Absolute Value during the First Year |fA|
-
- 10 ppm/yr
DC Insulation Resistance Between any Two Pins - 1.0 - -
MΩ
NS = Not Specified
Notes:
1. The frequency f
C
is defined as the midpoint between the 3dB
frequencies.
2. Unless noted otherwise, all measurements are made with the filter
installed in the specified test fixture that is connected to a 50Ω test
system with VSWR ≤ 1.2:1. The test fixture L and C are adjusted
for minimum insertion loss at the filter center frequency, f
C
. Note
that insertion loss, bandwidth, and passband shape are dependent
on the impedance matching component values and quality.
3. Unless noted otherwise, specifications apply over the entire
specified operating temperature range.
4. Frequency aging is the change in f
C
with time and is specified at
+65°C or less. Aging may exceed the specification for prolonged
temperatures above +65°C. Typically, aging is greatest the first
year after manufacture, decreasing in subsequent years.
5. Turnover temperature, T
0
, is the temperature of maximum (or
turnover) frequency, f
0
. The nominal frequency at any case
temperature, T
C
, may be calculated from: f = f
0
[1 - FTC (T
0
- T
C
)
2
].
6. The specifications of this device are based on the test circuit
shown above and subject to change or obsolescence without
notice.
7. All equipment designs utilizing this product must be approved by
the appropriate government agency prior to manufacture or sale.
8. Our liability is only assumed for the Surface Acoustic Wave (SAW)
component(s) per se, not for applications, processes and circuits
implemented within components or assemblies.
9. For questions on technology, prices and delivery please contact
our sales offices or email to sales@vanlong.com.
SF303M87
303.875 MHz SAW Filter
Phone: +86 10 6301 4184 Fax: +86 10 6301 9167 Email: sales@vanlong.com Web: http://www.vanlong.com
© April 2004 by Vanlong Technology Co., Ltd. SF303M87
Package Dimensions (TO-39)
Marking Test Circuit
Typical Frequency Response
Electrical Connections
Terminals Connection
1 Input/Output
2 Output/Input
3 Case Ground
Package Dimensions
Dimensions Nom. (mm) Tol. (mm)
A
9.35
±0.10
B
3.40
±0.10
C
3.00
±0.20
D
0.45
±0.10
E
5.08
±0.10
F
2.54
±0.20
G 0.45
C = 15 pF*
Ls1 = Ls2 = 70 nH
SF
303M87
Ink Marking
Color: Black or Blue