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 SAW Filter Pb Absolute Maximum Ratings Rating Value Maximum Incident Power in Passband dBm 3 VDC -40 to +85 °C Maximum DC Voltage between any Two Terminals Storage Temperature Range in Tape and Reel Units +10 Suitable for Lead-free Soldering - Maximum Soldering Profile 260°C for 30 s SM3838-8 Electrical Characteristics Characteristic Sym Notes Nominal Center Frequency Insertion Loss Insertion Loss Variation over Temperature 3 dB Bandwidth Passband Amplitude Ripple, Matching Network A, 129 to 151 MHz Passband Amplitude Ripple, Matching Network B, 129 to 151 MHz Passband Amplitude Ripple, Matching Network C or D, 130 to 150 MHz Absolute Attenuation (referenced to ILMAX) 10 to 116 MHz 165 to 700 MHz Absolute Group Delay in Passband Passband Group Delay Ripple, Matching Network A or B, 129 to 151 MHz Input Impedance, Unbalanced Matching Network Input Impedance, Balanced Matching Network Input Return Loss through any Matching Network Output Impedance, Unbalanced Matching Network Output Impedance, Balanced Matching Network Output Return Loss through any Matching Network Operating Temperature Range Case Style Lid Symbolization (Y=year, WW=week, S=shift) FC ILMAX 1 1 1 1 1 1 3 3 1 1 1 1 1 1 1 1 Min Typ 140 8 22 35 35 6 27 0.8 0.6 0.9 40 40 300 40 50 200 14 50 200 14 Max 9 1 1.2 1.0 1.0 350 80 6 -40 +85 SM3838-8 3.8 x 3.8 mm Nominal Footprint RFM 872 YWWS Units MHz dB dB MHz dBP-P dBP-P dBP-P dB dB ns nsP-P ohm ohm dB ohm ohm dB °C CAUTION: Electrostatic Sensitive Device. Observe precautions for handling. NOTES: 1. 2. 3. 4. Unless noted otherwise, all specifications apply over the operating temperature range with filter soldered to the specified demonstration board with impedance matching to 50 and measured with 50 network analyzer. Unless noted otherwise, all frequency specifications are referenced to the nominal center frequency, fc. Rejection in final user application is dependent on PCB layout and external impedance matching design. See Application Note No. 42 for details. "LRIP" or "L" after the part number indicates "low rate initial production" ©2010-2015 by Murata Electronics N.A., Inc. SF2181D (R) 8/3/15 5. 6. 7. 8. Page 1 of 11 and "ENG" or "E" indicates "engineering prototypes." The design, manufacturing process, and specifications of this filter are subject to change. 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. Murata, stylized Murata logo, and Murata N.A., Inc. are registered trademarks of Murata Manufacturing Co., Ltd. www.murata.com SF2181D, Using Matching Network A ©2010-2015 by Murata Electronics N.A., Inc. SF2181D (R) 8/3/15 Page 2 of 11 www.murata.com SF2181D, Using Matching Network A ©2010-2015 by Murata Electronics N.A., Inc. SF2181D (R) 8/3/15 Page 3 of 11 www.murata.com SF2181D, Using Matching Network B ©2010-2015 by Murata Electronics N.A., Inc. SF2181D (R) 8/3/15 Page 4 of 11 www.murata.com SF2181D, Using Matching Network C ©2010-2015 by Murata Electronics N.A., Inc. SF2181D (R) 8/3/15 Page 5 of 11 www.murata.com SF2181D, Using Matching Network C ©2010-2015 by Murata Electronics N.A., Inc. SF2181D (R) 8/3/15 Page 6 of 11 www.murata.com SF2181D, Using Matching Network D ©2010-2015 by Murata Electronics N.A., Inc. SF2181D (R) 8/3/15 Page 7 of 11 www.murata.com SF2181D, Matching Network A, Two Options SF2181D, Matching Network B, Two Options ©2010-2015 by Murata Electronics N.A., Inc. SF2181D (R) 8/3/15 Page 8 of 11 www.murata.com SF2181D, Matching Network C SF2181D, Matching Network D ©2010-2015 by Murata Electronics N.A., Inc. SF2181D (R) 8/3/15 Page 9 of 11 www.murata.com SM3838-8 Case 8-Terminal Ceramic Surface-Mount Case 3.8 X 3.8 mm Nominal Footprint Top View Bottom View 0 .0 6 6 (1 .6 8 ) 0 .0 3 3 (0 .8 4 ) 0 .0 0 2 (0 .0 5 ) 0 .0 4 4 (1 .1 2 ) 0 .0 5 0 T Y P . (1 .2 7 ) 0 .0 2 9 T Y P . (O .7 4 ) PCB Footprint for 180 Degree Rotation Option 0 .0 5 5 T Y P . (1 .4 0 ) ©2010-2015 by Murata Electronics N.A., Inc. SF2181D (R) 8/3/15 Page 10 of 11 www.murata.com Tape and Reel Specifications “B “ Nominal Size Inches Quantity Per Reel millimeters 7 178 1000 13 330 3000 COMPONENT ORIENTATION and DIMENSIONS Carrier Tape Dimensions Ao 4.25 mm Bo 4.25 mm Ko 1.30 mm Pitch 8.0 mm W 12.0 mm PIN #1 USER DIRECTION OF FEED ©2010-2015 by Murata Electronics N.A., Inc. SF2181D (R) 8/3/15 Page 11 of 11 www.murata.com