www.rfm.com e-mail: info@rfm.com page 1 of 5 ?2010 by rf monolithics, inc. SF1218D - 4/19/10 sm3838-6 ? low insertion loss ? 3.8 x 3.8 x 1.0 mm surface mount case ? single-ended input and output ? complies with directive 2002/95/ec (rohs) absolute maximum ratings rating value units maximum input power +27 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 260 c for 30 s 453.5 mhz saw filter SF1218D 1. unless noted otherwise, all specifications apply over the operat ing temperature range with filter soldered to the specified d emonstration board with impedance matching to 50 ? and measured with 50 ? 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 depen dent on pcb layout and external impedance matching design. see application note no. 42 for details. 4. the design, manufacturing process, and specifications of this filter are subject to change. 5. 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. 6. us and international patents may apply. 7. rfm, stylized rfm logo, and rf monolithics, inc. are registered trademarks of rf monolithics, inc. pb electrical characteristics characteristic sym notes min typ max units center frequency f c 1 453.5 mhz source impedance, single ended 50 ? load impedance, single ended 50 ? attenuation referenced to 0 db db 300 khz to 350 mhz 30 33 350 mhz to 445 mhz 25 30 460 mhz to 462 mhz 620 462 mhz to 467 mhz 25 35 467 mhz to 2000 mhz 25 33 maximum insertion loss, 450 to 455 mhz il max 1.7 3.0 db amplitude variation, 450 to 457 mhz 0.9 1.5 db input return loss, 450 to 457 mhz 9 11 db output return loss, 450 to 457 mhz 9 11 db operating temperature -40 +85 c case style sm3838-6 3.8 x 3.8 mm nominal footprint lid symbolization (y=year, ww=week, s=shift) dot=pin 1 indicator tbd, ywws standard reel quantity reel size 7 inch 1000 pieces/reel reel size 13 inch 3000 pieces/reel caution: electrostatic sensitive device. observe precautions for handling. notes: preliminary
www.rfm.com e-mail: info@rfm.com page 2 of 5 ?2010 by rf monolithics, inc. SF1218D - 4/19/10 filter broadband response
www.rfm.com e-mail: info@rfm.com page 3 of 5 ?2010 by rf monolithics, inc. SF1218D - 4/19/10 filter input impedance filter output impedance
www.rfm.com e-mail: info@rfm.com page 4 of 5 ?2010 by rf monolithics, inc. SF1218D - 4/19/10 6-terminal ceramic surface-mount case 3.8 x 3.8 mm nominal footprint case dimensions dimension mm inches min nom max min nom max a 3.60 3.80 4.0 0.14 0.15 0.16 b 3.60 3.80 4.0 0.14 0.15 0.16 c 1.30 1.50 1.70 0.05 0.06 0.067 d 0.95 1.10 1.25 0.037 0.043 0.05 e 2.39 2.54 2.69 0.090 0.10 0.110 g 0.90 1.0 1.10 0.035 0.04 0.043 h 1.90 2.0 2.10 0.75 0.08 0.83 i 0.50 0.6 0.70 0.020 0.024 0.028 j 1.70 1.8 1.90 0.067 0.07 0.075 electrical connections connection terminals port 1 single-ended input 2 port 2 single-ended output 5 ground all others single-ended operation only dot indicates pin 1 materials solder pad plating 0.3 to 1.0 m gold over 1.27 to 8.89 m nickel lid plating 2.0 to 3.0 m nickel body al 2 o 3 ceramic pb free sm3838-6 case top view bottom view 0.055 typ. (1.40) 0.036 (0.91) 0 . 0 2 9 t y p . ( 0 . 7 4 ) 0.066 (1.68) 0 . 0 5 0 t y p . ( 1 . 2 7 ) 0.176 ref. (4.47) 0 . 1 2 9 r e f . ( 3 . 2 8 ) pcb footprint 1 2 3 6 5 4 1 2 3 6 5 4 a bc d j e gh i
www.rfm.com e-mail: info@rfm.com page 5 of 5 ?2010 by rf monolithics, inc. SF1218D - 4/19/10 tape and reel specifications ?b ? quantity per reel inches millimeters 7 178 1000 13 330 3000 see detail "a" 1 3 . 0 2 0 . 2 2.0 12.0 1 0 0 r e f . " b " r e f . 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 ro.3 (max.) ko section a-a 0.3 0.05 section b-b bo 2.0 4.0 ao pitch bb a r0.5 (max.) a 5 . 5 1 2 . 0 1 . 7 5 1.5 1.50 pin #1 user direction of feed
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