RFM products are now Murata products. SF2181D 22 MHz Filter Bandwidth 3.8 x 3.8 x 1.4 mm Surface-mount Package Complies with Directive 2002/95/EC (RoHS) 140 MHz Pb SAW Filter Absolute Maximum Ratings Rating Value Units Maximum Incident Power in Passband +10 dBm Maximum DC Voltage between any Two Terminals 3 VDC Storage Temperature Range in Tape and Reel -40 to +85 C Suitable for Lead-free Soldering - Maximum Soldering Profile 260C for 30 s SM3838-8 Electrical Characteristics Characteristic Sym Notes Min Typ Max Units Nominal Center Frequency F 1 140 MHz C Insertion Loss IL189dB MAX Insertion Loss Variation over Temperature 1 1 dB 3 dB Bandwidth 1 22 27 MHz Passband Amplitude Ripple, Matching Network A, 129 to 151 MHz 1 0.8 1.2 dB P-P Passband Amplitude Ripple, Matching Network B, 129 to 151 MHz 1 0.6 1.0 dB P-P Passband Amplitude Ripple, Matching Network C or D, 130 to 150 MHz 0.9 1.0 dB P-P Absolute Attenuation (referenced to IL ) MAX 10 to 116 MHz 335 40 dB 165 to 700 MHz 335 40 dB Absolute Group Delay in Passband 1 300 350 ns Passband Group Delay Ripple, Matching Network A or B, 129 to 151 MHz 1 40 80 ns P-P Input Impedance, Unbalanced Matching Network 1 50 ohm Input Impedance, Balanced Matching Network 1 200 ohm Input Return Loss through any Matching Network 1 6 14 dB Output Impedance, Unbalanced Matching Network 1 50 ohm Output Impedance, Balanced Matching Network 1 200 ohm Output Return Loss through any Matching Network 1 6 14 dB Operating Temperature Range -40 +85 C Case Style SM3838-8 3.8 x 3.8 mm Nominal Footprint Lid Symbolization (Y=year, WW=week, S=shift) RFM 872 YWWS CAUTION: Electrostatic Sensitive Device. Observe precautions for handling. NOTES: 1. Unless noted otherwise, all specifications apply over the operating tem- andEN or indicatesengineering prototypes perature range with filter soldered to the specified demonstration board 5. The design, manufacturing process, and specifications of this filter are with impedance matching to 50 and measured with 50 network ana- subject to change. lyzer. 6. Either Port 1 or Port 2 may be used for either input or output in the design. 2. Unless noted otherwise, all frequency specifications are referenced to the However, impedances and impedance matching may vary between Port 1 nominal center frequency, fc. and Port 2, so that the filter must always be installed in one direction per 3. Rejection in final user application is dependent on PCB layout and the circuit design. external impedance matching design. See Application Note No. 42 for 7. US and international patents may apply. details. 8. Murata, stylized Murata logo, and Murata N.A., Inc. are registered 4.LRI or after the part number indicateslow rate initial productio trademarks of Murata Manufacturing Co., Ltd. 2010-2015 by Murata Electronics N.A., Inc. SF2181D (R) 8/3/15 Page 1 of 11 www.murata.comSF2181D, Using Matching Network A 2010-2015 by Murata Electronics N.A., Inc. SF2181D (R) 8/3/15 Page 2 of 11 www.murata.com