Document 282-1 Diplex Filters For DOCSIS 1.0, 1.1, 2.0 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 intended for two-way broadcast applications like cable modems, settop 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. Low pass filter High pass filter Part DOCSIS Insertion Return Insertion Return number standard Passband loss loss Passband loss loss Irms1 (mA) DPX4254-B DPX4254-C 1.0 1.0 5 – 42 MHz 5 – 42 MHz ≤1.0 dB ≤1.5 dB ≥15 dB ≥15 dB 54 – 860 MHz 54 – 860 MHz ≤1.5 dB ≤1.5 dB ≥15 dB ≥15 dB 500 150 DPX4288-B DPX4288-C 1.1, 2.0 1.1, 2.0 5 – 42 MHz 5 – 42 MHz ≤1.5 dB ≤1.5 dB ≥10 dB ≥10 dB 88 – 860 MHz 88 – 860 MHz ≤1.5 dB ≤1.5 dB ≥10 dB ≥10 dB 500 150 1. Current that causes a 15°C temperature rise from 25°C ambient. 2. Operating temperature range –40°C to +85°C. 3. Electrical specifications at 25°C. Schematic – Shielded Filters (-B) Diplex filter Schematic – Surface Mount Filters (-C) High pass filter 4 1 F connector (1) F connector Low pass filter 1 2 3 2 5 High pass Diplex filter 3 Low pass 4, 5 Low pass (3) Impedance: 75 ohms all ports Ground (5) High pass (2) Ground (4) Impedance: 75 ohms all ports US +1-847-639-6400 [email protected] UK +44-1236-730595 [email protected] Taiwan +886-2-2264 3646 [email protected] China +86-21-6218 8074 [email protected] Singapore + 65-6484 8412 [email protected] Document 282-1 Revised 01/11/08 © Coilcraft Inc. 2013 This product may not be used in medical or high risk applications without prior Coilcraft approval. Specification subject to change without notice. Please check web site for latest information. Document 282-2 Shielded Diplex Filter – DPX4254-B High pass response 0 0 20 20 40 40 S21 S31 Low pass response 60 60 80 80 100 1 10 100 100 1000 1 Frequency (MHz) 0 10 20 20 40 S32 S11 1000 Isolation 0 30 60 40 80 1 100 Frequency (MHz) Return loss 50 10 10 100 100 1000 1 Frequency (MHz) 10 100 1000 Frequency (MHz) Unshielded Diplex Filter – DPX4254-C High pass response 0 0 20 20 40 40 S21 S31 Low pass response 60 60 80 80 100 1 10 100 100 1000 1 Frequency (MHz) 0 10 20 20 40 S32 S11 1000 Isolation 0 30 60 40 80 1 100 Frequency (MHz) Return loss 50 10 10 100 1000 100 1 Frequency (MHz) US +1-847-639-6400 [email protected] UK +44-1236-730595 [email protected] Taiwan +886-2-2264 3646 [email protected] China +86-21-6218 8074 [email protected] Singapore + 65-6484 8412 [email protected] 10 100 1000 Frequency (MHz) Document 282-2 Revised 01/11/08 © Coilcraft Inc. 2013 This product may not be used in medical or high risk applications without prior Coilcraft approval. Specification subject to change without notice. Please check web site for latest information. Document 282-3 Shielded Diplex Filter – DPX4288-B High pass response 0 0 20 20 40 40 S21 S31 Low pass response 60 60 80 80 100 1 10 100 100 1000 1 Frequency (MHz) 0 10 20 20 40 S32 S11 1000 Isolation 0 30 60 40 80 1 100 Frequency (MHz) Return loss 50 10 10 100 100 1000 1 Frequency (MHz) 10 100 1000 Frequency (MHz) Unshielded Diplex Filter – DPX4288-C High pass response 0 0 20 20 40 40 S21 S31 Low pass response 60 60 80 80 100 1 10 100 100 1000 1 Frequency (MHz) 0 10 20 20 40 S32 S11 1000 Isolation 0 30 60 40 80 1 100 Frequency (MHz) Return loss 50 10 10 100 1000 100 1 Frequency (MHz) US +1-847-639-6400 [email protected] UK +44-1236-730595 [email protected] Taiwan +886-2-2264 3646 [email protected] China +86-21-6218 8074 [email protected] Singapore + 65-6484 8412 [email protected] 10 100 1000 Frequency (MHz) Document 282-3 Revised 01/11/08 © Coilcraft Inc. 2013 This product may not be used in medical or high risk applications without prior Coilcraft approval. Specification subject to change without notice. Please check web site for latest information. Document 282-4 Dimensions – DPX4254-B, DPX4288-B Dimensions – DPX4254-C A A C B D E B F F G G I 3 1 2 5 D 3/8 - 32 UNEF 2A F connector H H Recommended Land Pattern Packaged 32 per tray C A B C 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 27,05 14,22 5,46 3,94 1,27 7,62 10,16 17,78 3,05 1,78 7,75 13,84 F E H G I K L J 4 J J K Dimensions – DPX4288-C L A D C M E J J G N 3 1 5 0.039 × 0.157 (4) 1,0 × 4,0 0.196 / 4,98 0.274 / 6,96 0.039 × 0.130 (2) 1,0 × 3,3 0.452 / 11,48 0.550 / 13,97 J K I G G Recommended Land Pattern Packaged 32 per tray A B C max max max 1.065 0.560 0.215 27,05 14,22 5,46 D typ E F G H I J K 0.155 0.050 0.400 0.800 0.120 0.070 0.305 0.545 3,94 1,27 10,16 20,32 3,05 1,78 7,75 13,84 1.2745 / 32,37 0.2845 / 7,23 0.9935 / 25,24 1.0945 / 27,80 0.692 / 17,58 2 4 0 (4) 0 F F H 0.8025 / 20,38 0.1425 / 3,62 0.2405 / 6,11 0.3695 / 9,39 0 F F O 0.043 1,1 B Recommended Board Layout Packaged 25 per tray A max B max 1.40 0.81 35,56 20,57 C max 0.51 12,95 D 0.580 14,73 E 0.124 3,15 F 0.005 1,27 G 0.035 0,89 H 1.303 33,10 I 0.855 21,72 K 0.229 5,82 L 0.378 9,60 M 0.091 2,31 N 0.311 7,90 O 0.753 19,13 inches mm J 0.118 3,00 US +1-847-639-6400 [email protected] UK +44-1236-730595 [email protected] Taiwan +886-2-2264 3646 [email protected] China +86-21-6218 8074 [email protected] Singapore + 65-6484 8412 [email protected] Document 282-4 Revised 01/11/08 © Coilcraft Inc. 2013 This product may not be used in medical or high risk applications without prior Coilcraft approval. Specification subject to change without notice. Please check web site for latest information.