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| GIGABIT DUAL TRANSFORMERS For Use with 150 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 withstands 235C peak temperature profile Electrical Specifications @ 25C -- Operating Temperature 0C to 70C Part Number A6801 A6802 Turns Ratio (6%) 1CT:1CT 1:1 Primary Inductance OCL (H MIN) (@ 20 mVrms, 100 kHz) 5.50 5.50 DCR ( MAX) 0.21 0.21 Hi-Pot (Vrms) 1500 1500 Rise Time (ps MAX) 20-80% 350 280 Low Frequency Cutoff (-3 dB) < 2.5 MHZ < 2.5 MHZ Mechanical A680X .090 2,29 .500 .010 12,70 0,25 .460 .280 11,68 7,11 .420 .295 10,67 7,49 .350 8,89 .050 1,27 Schematics A6801 1:1 1 2 3 T1 1:1 6 11 10 9 7 8 16 15 14 A680X Date Code Cntry of Origin .030 0,76 SUGGESTED PAD LAYOUT .018 X 16 0,46 T2 A6802 .220 .010 5,59 0,25 .050 X7 1,27 .350 8,89 .004/0,10 16 SURFACES 1:1 1 0-8 .020 MIN 0,51 16 .005 .015 - 0,13 0,38 3 T1 1:1 6 14 11 Dimensions: Inches mm Unless otherwise specified, all tolerances are .005 0,13 Weight . . . . . . . . . . . .1.4 grams Tape & Reel . . . . . . . . .500/reel Tube . . . . . . . . . . . . . . .45/tube 8 T2 9 NOTE: For lower speed Fibre Channel applications, please refer to application note on data sheet A101. U.S.A: TEL 619 674 8100 * EUROPE: TEL 441 483 401 700 * ASIA: TEL 886 7 821 3141 * WEB: http://www.pulseeng.com A100.A (1/99) GIGABIT DUAL TRANSFORMERS Application Notes: For Use with 150 Twinax Cable Pulse has designed Gigabit Dual Transformers specifically for point to point coupling to 150 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 D.C. Gnd. 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 cost effective solution. The transformers are available in either tubes or Tape & Reel packaging. Chassis Gnd. C3 VCC GND 120 200 R1 TX+ TX- C1 .027 F TX+ DATE CODE Chassis Gnd. TX- SERDES CHIP SET RXRX+ 120 200 VCC R2 GND 150 A6801 Chassis Gnd. HSDCC OR DB9 CONNECTOR RXRX+ CTRY ORIGIN 75 TRANSMISSION LINES C2 .027 F C4 D.C. Gnd. Chassis Gnd. 1. R1 and R2 values should be based upon the transmit amplitude required for the system. Placing a short (0 ) 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 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 for R1 and R2 is recommended. Insertion Loss of Transmitter: Req = R1 + R2 and Zo = 150 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. A6801T) for "Tape & Reel" packaging in increments of 500. For More Information : Corporate 12220 World Trade Drive San Diego, CA 92128 Tel: 619 674 8100 FAX: 619 674 8262 http://www.pulseeng.com Quick-Facts: 619 674 9672 Europe 1 & 2 Huxley Road The Surrey Research Park Guildford, Surrey GU2 5RE United Kingdom Tel: 44 1483 401700 FAX: 44 1483 401701 Asia 150 Kampong Ampat #07-01/02 KA Centre Singapore 368324 Tel: 65 287 8998 FAX: 65 280 0080 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. (c)1999, Pulse Engineering, Inc. A100.A (1/99) |
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