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 — Operating Temperature -40°C to +85°C 1 2, 3 4 Impedance Ratio Turns Ratio Bandwidth Insertion Loss Return Loss Part OCL Primary Primary Pri:Sec Pri:Sec (MHz TYP) @ Midband 5 MHz - 65 MHz Schem. Number (µH MIN) Pins (±2%) (±2%) (dB TYP) (dB TYP) 3 dB 2 dB 1 dB C2020 1CT:1CT 1CT:1CT .150-210 .200-150 .350-90 .54 35 >20 dB A 1-3 C2022 1:4CT 1:2CT .100-500 .150-390 .300-220 .45 50 >20 dB B 1-3 NOTE: Optional Tape & Reel packaging can be ordered by adding a “T” suffix to the part number (ex: C2020T). Mechanical Schematics LS A 1 6 6 54 2 5 .258 3 4 6,55 .390 .275 MAX C202X 9,91 7,00 DATE CODE B .040 .075 1 6 1,02 1,91 .240 5 1 2 3 6,10 .300 MAX 3 4 SUGGESTED PAD LAYOUT 7,62 .250 Weight . . . . . . . . . . . . . .0.6 grams 6,35 Tape & Reel . . . . . . . . . . . .500/reel Tube . . . . . . . . . . . . . . . . . .70/tube .100 Inches Dimensions: 2,54 mm .200 .010 Unless otherwise specified, all tolerances are ± 0,25 5,08 ••••••••••••••••••••U.S: 858 674 8100 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 B. Bandwidth specifications are for a 75 Wsystem. A. These transformers have been optimized for use in the upstream interface for cable modems and set-top box applications. C. Materials used in the products are UL94-V0 recognized. The 5-80 MHz frequency range is well-suited for MCNS-DOC- Products meet the requirements of IEC 695-2-2 (Needle Flame SIS, Euro-DOCSIS/Davic/DVB product development. Test). Notes from Tables 1. Impedance and turns ratios are specified primary:secondary. 3. The insertion loss of these transformers is verified from -40°C (CT=Center Tap). to +85°C. Insertion loss over this temperature range is less than 1 dB from 5-80 MHz (relative to midband loss). 2. Bandwidth is referenced to midband loss. 4. Return loss performance changes with change in temperature. C2020 - Typical Insertion Loss 0 1 2 3 4 0.1 1 10 100 500 Frequency (MHz) C2022 - Typical Insertion Loss 0 1 2 3 4 0.1 100 1 10 500 Frequency (MHz) For More Information : UNITED STATES UNITED KINGDOM FRANCE SINGAPORE TAIWAN, R.O.C. DISTRIBUTOR (Worldwide) (Northern Europe) (Southern Europe) (Southern Asia) (Northern Asia) 1 & 2 Huxley Road 12220 World Trade Drive Zone Industrielle 150 Kampong Ampat 3F-4, No. 81, Sec. 1 The Surrey Research Park San Diego, CA 92128 F-39270 #07-01/02 HsinTai Wu Road Guildford, Surrey GU2 5RE Quick-Facts: 858 674 9672 Orgelet KA Centre Hsi-Chih, Taipei Hsien United Kingdom http://www.pulseeng.com France Singapore 368324 Taiwan, R.O.C. TEL: 44 1483 401700 TEL: 858 674 8100 TEL: 33 3 84 35 04 04 TEL: 65 287 8998 Tel: 886 2 2698 0228 FAX: 44 1483 401701 FAX: 858 674 8262 FAX: 33 3 84 25 46 41 FAX:65 280 0080 FAX: 886 2 2698 0948 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) Insertion Loss (dB) Insertion Loss (dB)