IMPEDANCE-MATCHING TRANSFORMER For CATV Wideband Amplifiers Miniature surface mount package Excellent insertion loss Provides impedance matching for 300Ω signal and 75Ω input to amplifier 2.0MHz to 1600MHz bandwidth Useful for CATV receivers and other applications Electrical Specifications @ 25°C — Operating Temperature -40°C to +85°C Part Number Impedance Ratio Pri:Sec (±2%) Turns Ratio Pri:Sec (±2%) Bandwidth (MHz TYP) CX2155 4:1 1:1 2.0 to 1600 Insertion Loss @ 78.5MHz (dB MIN) (dB MAX) -0.7 -1.5 NOTE: Optional Tape & Reel packaging can be ordered by adding a “T” suffix to the part number (ex: CX2155T). Mechanical Schematic CX2155 Top View +.020 .150 .015 3,81 +0,51 0,38 Dimensions: Inches mm Unless otherwise specified, all tolerances are ± .010 0,25 1 1 .150 ± .015 3,81 ± 0,38 Bottom View .110 ± .015 2,79 ± 0,38 5X.030 0,76 6 2 Side View .050 1,27 1:4 .100 2,54 5X.028 0,71 Pin 1 .050 1,27 3 4 .100 2,54 5X.030 0,76 Tape & Reel...................................1000 /reel Tray .................................................100 /tray Power Rating.........30 mA MAX; 0.25 W MAX .060 .190 1,52 4,83 SUGGESTED PAD LAYOUT US 858 674 8100 • UK 44 1483 401 700 • France 33 3 84 35 04 04 • Singapore 65 6287 8998 • Taiwan 886 2 2698 0228 • Hong Kong 852 2788 6588 • http://www.pulseeng.com C238.A (2/04) IMPEDANCE-MATCHING TRANSFORMER For CATV Wideband Amplifiers Application Notes A. Materials used in the products are UL94-V0 recognized. Products meet requirements of IEC 695-2-2 (Needle Flame Test). B. CX2155 transformer configuration does not provide DC isolation between primary and secondary windings. C. For additional impedance ratios and frequency ranges, please contact Pulse Applications Engineering. D. Pick and place operation: smooth upper surface of device allows automatic pick and place. E. For availability of Lead-Free version of this product, please contact Pulse. Notes from Tables 3. These transformers are verified to operate from -40°C to +85°C. Contact Pulse Applications Engineering for performance data. 1. Impedance & turns ratios are specified primary:secondary. (CT=Center Tap). 2. Bandwidth is referenced to midband loss. Insertion Loss (dB) CX2155 -- Typical Insertion Loss @ 25°C 0 1 2 3 4 0.1 1 10 100 Frequency (MHz) 1000 1600 For More Information : UNITED STATES (Worldwide) UNITED KINGDOM (Northern Europe) FRANCE (Southern Europe) SINGAPORE (Southern Asia) TAIWAN, R.O.C. (Northern Asia) HONG KONG (China/Hong Kong) 12220 World Trade Drive San Diego, CA 92128 U.S.A. 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 6287 8998 FAX: 65 6280 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 9/F, Phase 2, Tai Sang Shatin Warehouse Centre 6 Wong Chuk Yeung Street Fotan, Shatin, Hong Kong TEL: 852 2788 6588 FAX: 852 2776 1055 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. ©2004, Pulse Engineering, Inc. All Rights Reserved. C238.A (2/04)