? coilcraft, inc. 2007 specifications subject to change without notice. please check our website for latest information. diplex filters document 282-1 document 282-1 revised 01/11/08 these diplex filter modules provide both low pass and high pass filtering in low cost units that meet the requirements of the docsis 1.0, 1.1 and 2.0 standards.they are in- tended for two-way broadcast applications like cable mo- dems, set-top boxes and hfc cable network equipment. the dpx-c parts are low-profile surface mount units that require a minimum of board space. the dpx-b are shielded and come with an integrated coaxial f connector. in addition to the designs shown here, coilcraft can custom-engineer diplexers for specific applications. for free evaluation samples, contact coilcraft or order them on-line at www.coilcraft.com. 1. average current for a 15c temperature rise above 25c ambient. 2. operating temperature range ? 40c to +85c. 3. electrical specifications at 25c. low pass filter high pass filter part docsis insertion return insertion return i rms 1 number standard passband loss loss passband loss loss (ma) DPX4254-B 1.0 5 ? 42 mhz 1.0 db 15 db 54 ? 860 mhz 1.5 db 15 db 500 dpx4254-c 1.0 5 ? 42 mhz 1.5 db 15 db 54 ? 860 mhz 1.5 db 15 db 150 dpx4288-b 1.1, 2.0 5 ? 42 mhz 1.5 db 10 db 88 ? 860 mhz 1.5 db 10 db 500 dpx4288-c 1.1, 2.0 5 ? 42 mhz 1.5 db 10 db 88 ? 860 mhz 1.5 db 10 db 150 low pass (3) high pass (2) ground (5) f connector (1) ground (4) diplex filter 4 1 5 2 3 high pass filter low pass filter f connector schematic C shielded filters (-b) impedance: 75 ohms all ports diplex filter 2 4, 5 3 high pass 1 low pass schematic C surface mount filters (-c) impedance: 75 ohms all ports for docsis 1.0, 1.1, 2.0
? coilcraft, inc. 2007 specifications subject to change without notice. please check our website for latest information. document 282-2 document 282-2 revised 01/11/08 shielded diplex filter C DPX4254-B low pass response high pass response return loss isolation unshielded diplex filter C dpx4254-c low pass response high pass response return loss isolation 1 10 100 1000 s21 frequency (mhz) 20 40 60 100 80 0 1 10 100 1000 s31 frequency (mhz) 20 40 60 100 80 0 1 10 100 1000 s11 frequency (mhz) 10 20 30 50 40 0 1 10 100 1000 s32 frequency (mhz) 20 40 60 100 80 0 1 10 100 1000 s31 frequency (mhz) 20 40 60 100 80 0 1 10 100 1000 s21 frequency (mhz) 20 40 60 100 80 0 1 10 100 1000 s32 frequency (mhz) 20 40 60 100 80 0 1 10 100 1000 s11 frequency (mhz) 10 20 30 50 40 0
? coilcraft, inc. 2007 specifications subject to change without notice. please check our website for latest information. shielded diplex filter C dpx4288-b low pass response high pass response return loss isolation unshielded diplex filter C dpx4288-c low pass response high pass response return loss isolation 1 10 100 1000 s21 frequency (mhz) 20 40 60 100 80 0 1 10 100 1000 s31 frequency (mhz) 20 40 60 100 80 0 1 10 100 1000 s11 frequency (mhz) 10 20 30 50 40 0 1 10 100 1000 s32 frequency (mhz) 20 40 60 100 80 0 document 282-3 document 282-3 revised 01/11/08 1 10 100 1000 s32 frequency (mhz) 20 40 60 100 80 0 1 10 100 1000 s31 frequency (mhz) 20 40 60 100 80 0 1 10 100 1000 s21 frequency (mhz) 20 40 60 100 80 0 1 10 100 1000 s11 frequency (mhz) 10 20 30 50 40 0
? coilcraft, inc. 2007 specifications subject to change without notice. please check our website for latest information. abc d max max max typ e f g h i j k 1.065 0.560 0.215 0.155 0.050 0.400 0.800 0.120 0.070 0.305 0.545 17,05 14,22 5,46 3,94 1,27 10,16 20,32 3,05 1,78 7,75 13,84 a b e f g recommended land pattern f f f g c d h i j k 312 54 document 282-4 document 282-4 revised 01/11/08 (4) 0.043 1,1 recommended board layout 3/8 - 32 unef 2a f connector a b c d e f g h i j j k l m n o jj g 0.039 0.157 1,0 4,0 (4) 0.039 0.130 1,0 3,3 (2) 0 0 0 0.3695 / 9,39 0.1425 / 3,62 0.2405 / 6,11 0.8025 / 20,38 0.274 / 6,96 0.196 / 4,98 0.692 / 17,58 0.550 / 13,97 0.452 / 11,48 0.2845 / 7,23 0.9935 / 25,24 1.2745 / 32,37 1.0945 / 27,80 dimensions C DPX4254-B, dpx4288-b dimensions C dpx4254-c dimensions C dpx4288-c abc d max max max typ e f g h i j k l 1.065 0.560 0.215 0.155 0.050 0.300 0.400 0.700 0.120 0.070 0.305 0.545 17,05 14,22 5,46 3,94 1,27 7,62 10,16 17,78 3,05 1,78 7,75 13,84 a b e f h f g g h c d i j kl 31 2 54 recommended land pattern a max b max c max d e f g h 1.40 0.81 0.51 0.580 0.124 0.005 0.035 1.303 35,56 20,57 12,95 14,73 3,15 1,27 0,89 33,10 ij k lmn o 0.855 0.118 0.229 0.378 0.091 0.311 0.753 21,72 3,00 5,82 9,60 2,31 7,90 19,13 packaged 32 per tray packaged 32 per tray packaged 25 per tray
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