WIDEBAND RF TRANSFORMERS Upstream Transformers for Set-Top Box and Cable Modem Applications Optimized for 5-80 MHz operating frequency Less than 20 dB return loss Excellent insertion loss Operating temperature of -40°C to +85°C Electrical Specifications @ 25°C â Operating Temperature -40°C to +85°C Bandwidth 2, 3 Insertion Loss OCL Primary (MHz TYP) @ Midband (µH MIN) (dB TYP) 3 dB 2 dB 1 dB C2020 1CT:1CT 1CT:1CT .150-210 .200-150 .350-90 .54 35 C2022 1:4CT 1:2CT .100-500 .150-390 .300-220 .45 50 NOTE: Optional Tape & Reel packaging can be ordered by adding a âTâ suffix to the part number (ex: C2020T). Part Number 1 Impedance Ratio Pri:Sec (±2%) Turns Ratio Pri:Sec (±2%) Mechanical Return Loss4 5 MHz - 65 MHz (dB TYP) Schem. Primary Pins >20 dB >20 dB A B 1-3 1-3 Schematics LS 6 5 1 4 .258 6,55 .390 9,91 C202X 2 3 .300 MAX 7,62 5 3 4 .275 MAX 7,00 .040 1,02 .240 6,10 U.S: 858 674 8100 .075 1,91 SUGGESTED PAD LAYOUT .250 6,35 .100 2,54 .200 5,08 6 2 DATE CODE 1 A 1 B 6 5 3 4 Weight . . . . . . . . . . . . . .0.6 grams Tape & Reel . . . . . . . . . . . .500/reel Tube . . . . . . . . . . . . . . . . . .70/tube Dimensions: Inches mm Unless otherwise specified, all tolerances are ± .010 0,25 · U.K: 44 1483 401 700 · France: 33 3 84 35 04 04 · Singapore: 65 287 8998 · Taiwan: 886 2 2698 0228 · http://www.pulseeng.com PRELIMINARY C200.P (2/00) WIDEBAND RF TRANSFORMERS Upstream Transformers for Set-Top Box and Cable Modem Applications Application Notes A. These transformers have been optimized for use in the upstream interface for cable modems and set-top box applications. The 5-80 MHz frequency range is well-suited for MCNS-DOCSIS, Euro-DOCSIS/Davic/DVB product development. B. Bandwidth specifications are for a 75 W system. C. Materials used in the products are UL94-V0 recognized. Products meet the requirements of IEC 695-2-2 (Needle Flame Test). Notes from Tables 1. Impedance and turns ratios are specified primary:secondary. (CT=Center Tap). 2. Bandwidth is referenced to midband loss. 3. The insertion loss of these transformers is verified from -40°C to +85°C. Insertion loss over this temperature range is less than 1 dB from 5-80 MHz (relative to midband loss). 4. Return loss performance changes with change in temperature. C2020 - Typical Insertion Loss Insertion Loss (dB) 0 1 2 3 4 0.1 1 10 100 500 100 500 Frequency (MHz) C2022 - Typical Insertion Loss Insertion Loss (dB) 0 1 2 3 4 0.1 1 10 Frequency (MHz) For More Information : UNITED STATES (Worldwide) UNITED KINGDOM (Northern Europe) FRANCE (Southern Europe) SINGAPORE (Southern Asia) TAIWAN, R.O.C. (Northern Asia) 12220 World Trade Drive San Diego, CA 92128 Quick-Facts: 858 674 9672 http://www.pulseeng.com TEL: 858 674 8100 FAX: 858 674 8262 1 & 2 Huxley Road The Surrey Research Park Guildford, Surrey GU2 5RE United Kingdom TEL: 44 1483 401700 FAX: 44 1483 401701 Zone Industrielle F-39270 Orgelet France TEL: 33 3 84 35 04 04 FAX: 33 3 84 25 46 41 150 Kampong Ampat #07-01/02 KA Centre Singapore 368324 TEL: 65 287 8998 FAX:65 280 0080 3F-4, No. 81, Sec. 1 HsinTai Wu Road Hsi-Chih, Taipei Hsien Taiwan, R.O.C. Tel: 886 2 2698 0228 FAX: 886 2 2698 0948 DISTRIBUTOR Performance warranty of products offered on this data sheet is limited to the parameters specified. Data is subject to change without notice. Other brand and product names mentioned herein may be trademarks or registered trademarks of their respective owners. Printed on recycled paper. ©2000, Pulse Engineering, Inc. PRELIMINARY C200.P (2/00)