Document 152 Tip and Ring Common Mode Filters These economical filters are designed to help telecommunications equipment engineers meet FCC and CCITT requirements. Available in 1 or 2 line (2 or 4 wire) versions, Coilcraft tip and ring filters provide >15 dB attenuation of common mode noise over the 3 Hz to 300 MHz frequency range. Part number: TRF 2000L (1-line) TRF 4000L (2-line) 20 µH 500 mA 0.065 Ohms max 1500 Vrms min Minimum inductance: Rated current: DC resistance: Dielectric strength1: 1. For TRF 2000, dielectric strength measured from pins 1,8 to 4,5. For TRF 4000, dielectric strength measured from pins 1,2,7,8 to pins 3,4,5,6. 2. Operating temperature range –40°C to +85°C. 3. Electrical specifications at 25°C. TRF 2000L Typical Response* TRF 4000L C C 0 Attenuation (dB) Differential Mode B B 10 D 20 0.030 dia 0,76 Common mode 5 8 D 0.030 dia 0,76 7 8 5 6 30 A 40 0.1 1 10 100 Frequency (MHz) 1 2 Terminations: *measured on HP 8753D network analyzer 8 5 1 4 Tin-silver over tin Recommended Board Layout 0.040 1,02 (5×) TRF 4000 8 7 6 3 4 8 5 0.040 1,02 (8×) E 5 1 2 Recommended Board Layout 5 8 TRF 2000 A 1000 E 1 4 F 4 F G 1 4 1 2 3 4 A max B max C max D E F G 0.425 0.550 0.475 0.115 0.300 0.100 0.300 10,80 13,97 12,07 2,92 7,62 2,54 7,62 Specifications subject to change without notice. Please check our website for latest information. © Coilcraft, Inc. 2010 Document 152 Revised 05/27/05