cg01-j 191 surface mount emi filters chip filters nfm839r series the nfm839r series is a high performance emi suppression filter which suppresses noise while limiting waveform distortion. available in three different values with cut-off frequencies ranging from 20mhz to 100mhz. features use of a distributed circuit constant allows a smooth change of impedance, preventing reflection of signal and distortion of wave shape the nfm839r series is effective where ground is unstable, because the resistance element in the filter absorbs noise std eia size steep attenuation characteristics applications suppression of noise in interface line or clock line of digital equipment (such as personal computers, word processors). nfm839r 02 c100 r220 t1 chip emi class capacitance resistance packaging filter code code code series c100: 10pf r220: 22 ohms t1 = tape c470: 47pf r101: 100 ohms b1 = bulk part numbering system typical insertion loss characteristics rated rated insulation operating dimensions: mm part number capacitance resistance current voltage resistance temperature (pf) (ohms) (ma) (vdc) (ohms min.) range ? ? ? nfm839r02c100r220 10 20% 22 30% 50 nfm839r02c100r470 47 30% 35 nfm839r02c470r220 22 30% 50 nfm839r02c470r470 47 20% 47 30% 35 nfm839r02c470r680 68 30% 30 50 1000m ?0 ~ +85? nfm839r02c470r101 100 30% 25 nfm839r02c101r220 22 30% 50 nfm839r02c101r470 100 20% 47 30% 35 nfm839r02c101r680 68 30% 30 nfm839r02c101r101 100 30% 25 specifications 0805 input (output) terminal ground terminal output (input) terminal 1.0 max. (surface) 2.00.2 1.00.35 0.50.2 1.250.2 0.95 0.35 insertion loss (db) 1 10 100 1000 frequency (mhz) nfm839r02c101r101 nfm839r02c470r101 0 10 20 30 40 50 insertion loss (db) 1 10 100 1000 frequency (mhz) nfm839r02c100r220 nfm839r02c100r470 nfm839r02c470r220 nfm839r02c470r470 nfm839r02c470r680 nfm839r02c101r220 nfm839r02c101r470 nfm839r02c101r680 0 10 20 30 40 50 for high impedance line (measured with 50 ohm ~ 3k ohm lines) for low impedance line (measured with 50 ohm ~ 150 ohm lines) available as standard through authorized murata electronics distributors. surface mount emi filters
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