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SF1145B (R) 3/19/14 Page 1 of 3
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1. 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.
2. Unless noted otherwise, all frequency specifications are referenced to the nominal center frequency, fc.
3. 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.
4. "LRIP" or "L" after the part number indicates "low rate initial production" and "ENG" or "E" indicates "engineering prototypes."
5. The design, manufacturing process, and specifications of this filter are subject to change.
6. Tape and Reel Standard ANSI / EIA 481.
7. 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.
8. US and international patents may apply.
9. Murata, stylized Murata logo, and Murata N.A., Inc. are registered trademarks of Murata Manufacturing Co., Ltd.
Electrical Characteristics
Characteristic Sym Notes Min Typ Max Units
Nominal Center Frequency f
C
1
427.250 MHz
Passband Insertion Loss at fc IL 3.5 dB
1.5 dB Passband BW
1
1, 2 ±15 kHz
Rejection (referenced to fc=427.250 MHz) fc±1.5 MHz
1, 2, 3
5
dB
fc±6.0 MHz 20
fc±50 MHz 50
Operating Temperature Range T
A
1-40 +85°C
Differential Input and Output Impedance after matching 50 ohms
Case Style
6
SMP-03 7 x 5 mm Nominal Footprint
Lid Symbolization (YY=year, WW=week, S=shift) See note 4 RFM SF1145B YYWWS
SMP-03
• Low Insertion Loss
• 5.0 X 7.0 mm Surface-Mount Case
• Complies with Directive 2002/95/EC (RoHS)
Absolute Maximum Ratings
Rating Value Units
Maximum Incident Power in Passband +10 dBm
Max. DC voltage between any 2 terminals 30 VDC
Storage Temperature Range -40 to +85 °C
Suitable for lead-free soldering - Max Soldering Profile 260°C for 30 s
427.250 MHz
SAW Filter
SF1145B
Electrical Connections
Connection Terminals
Port 1 Hot 10
Port 1 Ground Return 1
Port 2 Hot 5
Port 2 Ground Return 6
Case Ground All Others
Pb
CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.
NOTES:
Copyright © Murata Manufacturing Co., Ltd. All Rights Reserved 2007
