GIGABIT DUAL TRANSFORMERS For Use with 150 Ω Twinax Cable Compliant with ANSI X3T9.5, FC-PH-3 Fibre Channel Physical Layer Specification Compliant with IEEE 802.3z PMD Designed for fast rise-time and a low frequency cutoff of 2.5 MHz IC grade transfer-molded package withstand 245°C peak temperature profile Electrical Specifications @ 25°C — Operating Temperature 0°C to 70°C Part Number Turns Ratio (±6%) Primary Inductance OCL (µH MIN) (@ 20 mVRMS, 100 kHz) DCR (Ω MAX) Hi-Pot (VRMS) Rise Time (ps MAX) 20-80% Low Frequency Cutoffw (-3 dB) A6801NL A6802NL 1CT:1CT 1:1 5.50 5.50 0.21 0.21 1500 1500 350 280 < 2.5 MHZ < 2.5 MHZ Mechanical Schematics A680XNL A6801NL 1:1 .350 8,89 .090 2,29 .050 1,27 .500 ±.010 12,70 0,25 1 16 2 15 3 .460 .280 11,68 7,11 .420 .295 10,67 7,49 14 T1 1:1 6 11 7 10 A680XNL Date Code Cntry of Origin .018 X 16 0,46 .030 0,76 8 SUGGESTED PAD LAYOUT T2 9 A6802NL .220 ±.010 5,59 0,25 .005 .015 – 0,13 0,38 1:1 16 1 .050 X7 1,27 .004/0,10 16 SURFACES 0–8° .020 MIN 0,51 .350 8,89 14 3 T1 1:1 6 Dimensions: Inches mm Unless otherwise specified, all tolerances are ± .005 0,13 11 Weight . . . . . . . . . . . . . 1.4 grams Tape & Reel . . . . . . . . . . . 500/reel Tube . . . . . . . . . . . . . . . . . 45/tube 8 9 T2 NOTE: For lower speed Fibre Channel applications, please refer to application note on data sheet A101. USA 858 674 8100 ● Germany 49 7032 7806 0 ● Singapore 65 6287 8998 ● Shanghai 86 21 32181071 ● China 86 755 33966678 ● Taiwan 886 3 4643715 www.pulseeng.com 1 A100.B (3/09) GIGABIT DUAL TRANSFORMERS For Use with 150 Ω Twinax Cable Application Notes: Pulse has designed Gigabit Dual Transformers specifically for point to point coupling to 150 Ω Twinax cable. The isolation transformers protect the station from static charges that may develop on the cable and prevent ground loop currents from being transferred between stations. The devices have also been designed to provide common mode rejection within the transmission band and thus reduce EMI. The bandwidth of these devices minimizes data dependent jitter by providing fast signal rise times. The dual package allows connection of both the transmit and receive channels as shown in the application circuit below. Surface mount packaging also allows a costeffective solution. The transformers are available in either tubes or Tape & Reel packaging. 1. R1 and R2 values should be based upon the transmit amplitude required for the system. Placing a short (0 Ω) will result in maximum amplitude. However, doing so will result in distortion on the output due to impedance mismatch. For optimum design, R1 and R2 should be approximately 68 Ω for each leg. This will result in a -6.0 dB insertion loss (transmitter section). If this is too much insertion loss, then at least a 15 Ω for R1 and R2 is recommended. Insertion Loss of Transmitter: Req = R1 + R2 and Zo = 150 Ω Insertion Loss = 20 log [Zo / Req + Z0] 2. When designing PCB layout, transmission line methods must be utilized to maintain return loss and signal integrity. Transformer should be located within 1” of cable connector. 3. tr transformer = [(trout)2 - (tr in)2] 4. The typical application circuit shown above is a suggested layout. Actual board layout may vary based upon individual applications and EMC concerns. NOTE: These gigabit dual transformers are packaged in tubes unless Tape & Reel is specified. When ordering, add the suffix “T” (i.e. A6801NLT) for “Tape & Reel” packaging in increments of 500. For More Information: Pulse Worldwide Headquarters Pulse Europe Einsteinstrasse 1 12220 World Trade Dr. D-71083 Herrenberg San Diego, CA 92128 Germany U.S.A. www.pulseeng.com Tel: 858 674 8100 Fax: 858 674 8262 Tel: 49 7032 7806 0 Fax: 49 7032 7806 135 Pulse China Headquarters Pulse North China Pulse South Asia Pulse North Asia B402, Shenzhen Academy of Aerospace Technology Bldg. 10th Kejinan Rd. High-Tech Zone Nanshan District Shenzen, PR China 518057 TEL: 86 755 33966678 FAX: 86 755 33966700 Room 1503 XinYin Building No. 888 YiShan Rd. Shanghai 200233 China 135 Joo Seng Rd. #03-02 PM Industrial Bldg. Singapore 368363 No. 26, Kao Ching Rd. Yang Mei Chen Taoyuan Hsien Taiwan R. O. C. Tel: 86 21 54643211/2 Fax: 86 21 54643210 TEL: 65 6287 8998 FAX: 65 6280 0080 Tel: 886 3 4643715 Fax: 886 3 4641911 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. © Copyright, 2009. Pulse Engineering, Inc. All rights reserved. www.pulseeng.com 2 A100.B (3/09)