EMI Filters KNF Series Features How to Order KNF 21 050 - W 3 * Distributed constant type LC filter. Prevents ringing caused by circuit impedance. Suitable for high speed digital circuits and video signal lines. * Stable noise attenuation over wide frequency ranges. * Low profile (T=0.95mm max.) suitable for miniature electronic equipments. * First class auto-placement RoHS Compliant Dimensions (Unit : mm) W L OUT Input Direction Mark 025 050 100 Applications * PCs, Laser Printers, Cellular Phone, 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 25MHz 50MHz 100MHz L 2.00.2 W 1.250.2 T 0.80.15 G 0.40.3 3 Cut off Freq. (MHz) KNF21025 25MHz 235pF 200- 600MHz KNF21050 50MHz 130pF 350- 850MHz KNF21100 100MHz 65pF 450- 950MHz KNF21200 200MHz 33pF 700-1200MHz KNF21400 400MHz 17pF 900-1400MHz 10 0 -10 KNF21025 KNF21050 -20 KNF21100 KNF21200 KNF21400 -30 -40 Equivalent Circuit 200MHz 400MHz Capacitance 20dB Attenuation Rated Rated (+50/-20%) (Typical) current(mA) voltage(VDC) (pF) KNF21 Series GND 200 400 3000pcs. Part Number Cut off Frequency at Attenuation typical 3dB, max. 6dB Operating Temperature: -25 to 85(C) OUT (EIAJ) (2012) Specifications Frequency Characteristics IN Taping Direction (See Fig 1) W: Standard Quantity per Reel G KNF21 Series Size EIA 21 :0805 Frequency T IN -50 1 10 100 Frequency(MHz) - 17 - 1000 10000 150mA 25VDC EMI Filters KNF Series <Impedance Matching Free> Output Waveform (Clock frequency 25MHz) * Stable attenuation against impedance change * Good impedance matching without ringing on distortion even at the time of IC ON/OFF and pattern layout change R LC filter KNF21100 1M Test circuit LVC74 LVC04 filter R 25MHz 300 Test point <No Ringing> Excellent Impedance Matching KNF series Output waveform LC filter Output waveform * Wide attenuation up to high frequency range without distortion Wide Attenuation Bandwidth KNF21100 LC Filter (T-Type) Spectrum att.(dBuV) filter 50mm 25MHz 120 100 80 Original 60 Filter passed 40 25 Test point Recommended Land Pattern Spectrum att.(dBuV) 120 Test Circuit LVC74 No filter Output waveform 100 60 Filter passed 40 125 225 325 425 525 625 725 825 925 Frequency(MHz) (Unit : mm) Original 80 25 125 225 325 425 525 625 725 825 925 Frequency(MHz) Packaging Specification (Fig.1) * Taping (3,000/reel) Through Hole D Resist (Unit : mm) R 8.0 W Q U S Taping Direction(W) W(Standard) 4.0 P T KNF21 3.20 C Conductor T Resist W R 2.30 1.00 C P 1.20 0.80 Q 0.40 S Direction of Feed D U 0.60 0.3-0.4 2.00 - 18 - EMI Filters KNH Series How to Order KNH 21 104 - 3 AA Features * 0805 Size. Rated current up to 2A. * Effective for filtering noise on power (Vcc) lines. RoHS Compliant Series Size EIA (EIAJ) 21: 0805 (2012) Capacitance Value Applications Pb Free * PCs, Laser Printers, Cellular Phone, Power/Signal Lines for LCD Display, Office Equipments * AV Power Supply/Signal Line, TV, VCR, etc. * High Current Signal Lines 104 473 471 221 100nF 47nF 470pF 220pF 101 470 220 100pF 47pF 22pF Quantity per Reel 3 3000pcs. Code (AA : STD) Dimensions Specifications (Unit : mm) W IN/OUT T IN/OUT G Capacitance Rated Current Rated Voltage Direct-current Value(pF) (A) (VDC) resistance() (+50/-20%) KNH21 Type L 2.00.2 KNH21104 100,000 2.0 25 0.02 KNH21473 47,000 2.0 50 0.02 W 1.250.2 KNH21471 470 1.0 50 0.08 T 0.850.15 KNH21221 220 1.0 50 0.08 G 0.400.30 KNH21101 100 1.0 50 0.08 KNH21470 47 1.0 50 0.08 KNH21220 22 1.0 50 0.08 L Operating Temperature: -25 to 85(C) Attenuation Characteristics Recommended Land Pattern (Unit : mm) -30 0.40 2.30 0.60 KNH21471 KNH21221 KNH21101 -20 1.00 -10 2.00 Resist 0 -50 8.0 KNH21470 KNH21220 -40 KNH21104 -60 KNH21473 1 10 100 1000 0.80 10000 4.0 1.20 Frequency(MHz) Conductor Resist 3.20 <Electrical Characteristics> * Wide attenuation range including surrounding circuit. KNH series LC filter VDD(3.3V) filter LVC74 25MHz Spectrum attenuation(dBuV) 60 Test Circuit Test point Attenuation Effect of Power Supply Noise 60 Original 55 50 45 Filter passed 40 35 30 25 125 225 325 425 525 625 725 825 925 FREQ(MHz) - 21 - Spectrum attenuation(dBuV) Attenuation(dB) Packaging specifications * Taping (3000/reel) Through Hole 0.3-0.4 10 -70 (Unit : mm) Original 55 50 Filter passed 45 40 35 30 25 125 225 325 425 525 625 725 825 925 FREQ(MHz)