EMI Noise Filter KNF 21/32 Series / Signal Line Use HOW TO ORDER Part Number KNF 32 1 2 050 -W 3 3 4 5 1 Series 2 Size: 21=2012 (0805); 32=3216 (1206) 3 Type (Freq.): 025 – 25MHz, 050 – 50MHz 100 –100MHz, 200 – 200MHz 400 – 400MHz 4 Taping Direction (W, X) W (STD) X 5 Quantity Per Reel: 3 – 3000p (Std.) FEATURES • Distributed constant type LC filter. Prevents ringing caused by circuit impedance. Suitable for high speed digital circuits and visual line circuits. • Stable noise attenuation over wide frequency ranges. • Low profile (H = 1.0mm max.) suitable for miniature electronic equipment. • First class auto-placement. DIMENSIONS A 3 Input Directional Mark 1 APPLICATIONS 1 : INPUT • PCs, Laser Printers, Clock Data Lines for LCD Display • High Speed Video Signal Circuits and Interface Circuits • High Speed Digital Circuits • Anti-Noise Solution Achieves effective noise suppression in noisy high speed circuits without signal waveform distortion. Cut off Frequency (MHz) Capacitance (pF) Attenuation (dB) C 2 : OUTPUT D 3 : GROUND millimeters (inches) A SPECIFICATIONS Part Number 2 B Rated Current (A) Rated Voltage (V) KNF 21 KNF 32 2.00 (0.079) 3.20 (0.126) B 1.25 (0.049) 1.60 (0.063) C 0.80 (0.031) 1.00 (0.039) D 0.40 (0.016) 0.60 (0.024) KNF21050 50 130 20 (350-850) MHz 0.15 25 KNF21100 100 65 20 (450-950) MHz 0.15 25 KNF21200 200 33 20 (700-1200) MHz 0.15 25 KNF21400 400 17 20 (900-1400) MHz 0.15 25 KNF32025 25 235 20 (200-600) MHz 0.20 25 KNF32050 50 130 20 (350-850) MHz 0.20 25 GND KNF32100 100 65 20 (450-950) MHz 0.20 25 Equivalent Circuit KNF32200 200 33 20 (600-1100) MHz 0.20 25 OUT IN EMI Noise Filter KNF 21/32 Series / Signal Line Use PERFORMANCE CHARACTERISTICS KNF 21 SERIES 10 -10 -20 100MHz 50MHz -30 200MHz 0 Attenuation (dB) Attenuation (dB) 0 KNF 32 SERIES 10 400MHz 200MHz 100MHz -10 -20 50MHz 25MHz -30 -40 -40 -50 10 20 50 -50 10 100 200 500 1000 2000 Frequency (MHz) 20 50 100 200 500 1000 2000 Frequency (MHz) LAND PATTERN TYPICAL EXAMPLE OF SUPPRESSION U (Via Hole) Spectrum Attenuation (dB) KC KNF32050 10 Distributed Parameter Circuit OUTPUT WAVE FORM ORIGINAL WAVE FORM 0 Q S -10 W R -20 -30 -40 2V 0 20ns 20ns 2V 100 200 300 400 500 Frequency (MHz) Foot Print P C Solder Resist Area Spectrum Attenuation (dB) LC FILTER T Lumped Parameter Circuit 10 Dimensions: millimeters (inches) 0 74HC04 FILTER 74HC00 -10 T -20 10MHz 15cm -30 -40 2V 0 20ns Measuring Point 100 200 300 400 500 Frequency (MHz) KNF 21 KNF 32 3.20 (0.126) 4.40 (0.173) W 1.00 (0.039) 1.40 (0.055) R 2.30 (0.091) 3.00 (0.118) C 1.20 (0.047) 2.50 (0.098) P 0.80 (0.031) 1.20 (0.047) Q 0.40 (0.016) 0.60 (0.024) S 0.60 (0.024) 0.60 (0.024) U 0.30 (0.012) - 0.40 (0.016) 0.50 (0.020) NOTICE: Specifications are subject to change without notice. Contact your nearest AVX Sales Office for the latest specifications. All statements, information and data given herein are believed to be accurate and reliable, but are presented without guarantee, warranty, or responsibility of any kind, expressed or implied. Statements or suggestions concerning possible use of our products are made without representation or warranty that any such use is free of patent infringement and are not recommendations to infringe any patent. The user should not assume that all safety measures are indicated or that other measures may not be required. Specifications are typical and may not apply to all applications. 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