®
SF2079D
251.045 MHz
Pb
•
•
•
•
Low Insertion Loss
3.8 X 3.8 mm Surface-Mount Case
Single Ended Input and Output
Complies with Directive 2002/95/EC (RoHS)
SAW Filter
Absolute Maximum Ratings
Rating
Maximum Incident Power in Passband
Max. DC voltage between any 2 terminals
Storage Temperature Range
Suitable for lead-free soldering - Max Soldering Temperature
Value
+13
30
-40 to +85
260°C for 30 s
Units
dBm
VDC
°C
SM3838-8
Electrical Characteristics
Characteristic
Nominal Center Frequency
Insertion Loss
Amplitude Ripple (p-p)
Sym
f
C
Fc-6.250 to Fc-4.3925 MHz
Fc-4.3925 to Fc-2.535 MHz
Fc-2.5350 to Fc-0.025 MHz
Fc+0.025 to Fc+2.535 MHz
Fc+2.5350 to Fc+4.3925 MHz
Fc+4.3925 to Fc+6.250 MHz
Notes
1
1
Min
Typ
251.045
15.5
0.7
0.5
0.8
0.9
0.5
0.6
13.9
14.5
37
32
30
40
45
25
20
15
25
45
150
Max
17.5
1.5
1.5
1.5
1.5
1.5
1.5
Units
MHz
dB
dB
dB
dB
dB
dB
dB
MHz
MHz
dB
dB
dB
dB
ppm/K
ns
ns
ns
ns
ns
ns
Ohms
°C
Pass bandwidth of -1.5dB
Pass bandwidth of -3dB
Low side attenuation Fc<(Fc-16.5 MHz)
Low side attenuation between: (Fc-16.5 MHz)...(Fc-10.5 MHz)
High side attenuation between: (Fc+9.0 MHz)...(Fc+16.5 MHz)
High side attenuation Fc>(Fc+16.5 MHz)
Temperature Coefficient of frequency
Delay Ripple (p-p)
Fc-6.250 to Fc-4.3925 MHz
Fc-4.3925 to Fc-2.535 MHz
Fc-2.5350 to Fc-0.025 MHz
Fc+0.025 to Fc+2.535 MHz
Fc+2.5350 to Fc+4.3925 MHz
Fc+4.3925 to Fc+6.250 MHz
Terminating Source / Load Impedance: Z
IN
/ Z
OUT
Operating Temperature Range
Case Style
Lid Symbolization (Y=year, WW=week, S=shift)
33
28
24
35
-18
70
70
90
90
70
90
-40
+85
SM3838-8 3.8 x 3.8 mm Nominal Footprint
RFM TBD YWWS
Notes:
1.
2.
3.
4.
5.
6.
7.
8.
9.
Unless noted otherwise, all specifications apply over the operating temperature range with filter soldered to the specified demonstration board with impedance matching to
50
Ω
and measured with 50
Ω
network analyzer.
Rejection is measured as attenuation below the minimum IL point in the passband. Rejection in final user application is dependent on PCB layout and external impedance
matching design. See Application Note No. 42 for details.
The design, manufacturing process, and specifications of this filter are subject to change.
Tape and Reel Standard ANSI / EIA 481.
Either Port 1 or Port 2 may be used for either input or output in the design. However, impedances and impedance matching may vary between Port 1 and Port 2, so that
the filter must always be installed in one direction per the circuit design.
US and international patents may apply.
RFM, stylized RFM logo, and RF Monolithics, Inc. are registered trademarks of RF Monolithics, Inc.
©Copyright 1999, RF Monolithics Inc.
Electrostatic Sensitive Device. Observe precautions for handling.
RF Monolithics, Inc.
Phone: (972) 233-2903
Fax: (972) 387-8148
RFM Europe
Phone: 44 1963 251383
Fax: 44 1963 251510
©1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc.
E-mail: info@rfm.com
http://www.rfm.com
SF2079D-060607
Page 1 of 5
RFM [ RF MONOLITHICS, INC ]
