A6801 PULSE | Alldatasheet
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.220 ±.010 5,59 0,25 .050 1,27 X 7 .350 8,89 .020 MIN0,51 Date Code Cntry of Origin .420 10,67 .295 7,49 .018 0,46 X 16 .004/0,10
16 SUR FACES
0–8° SUGGESTED PAD LAYOUT .350 8,89 .050 1,27 .090 2,29 .280 7,11 .460 11,68 .030 0,76 A680X .005 –.015 0,13 0,38 .500 ±.010 12,70 0,25 1:1 1:1 Part Turns Ratio Primary Inductance DCR Hi-Pot Rise Time Low Frequency Number (±6%) OCL (µH MIN) (Ω MAX) (Vrms) (ps MAX) Cutoff (@ 20 mVrms, 100 kHz) 20-80% (-3 dB) A6801 1CT:1CT 5.50 0.21 1500 350 < 2.5 MHZ A6802 1:1 5.50 0.21 1500 280 < 2.5 MHZ GIGABIT D U AL TRANSFORMERS For Use with 150 Ω Twinax Cable A100.A (1/99) Mechanical Schematics A680X Dimensions: Inches mm Unless otherwise specified, all tolerances are ±.005 0,13 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 235°C peak temperature profile U.S.A: TEL 619 674 8100 •• EUROPE: TEL 441 483 401 700 •• ASIA: TEL 886 7 821 3141 •• WEB: http://www.pulseeng.com Electrical Specifications @ 25°C — Operating Temperature 0°C to 70°C NOTE: For lower speed Fibre Channel applications, please refer to application note on data sheet A101. 1:1 1:1 A6801 A6802
- 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 - (trin)2 ] 4. The typical application circuit shown above is a sug- gested 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 GIGABIT DUAL TRANSFORMERS For Use with 150 Ω Twinax Cable 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. A100.A (1/99) Printed on recycled paper. ©1999, Pulse Engineering, Inc. Application Notes: Pulse has designed Gigabit Dual Transformers speci- fically 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 cost effective solution. The transformers are available in either tubes or Tape & Reel packaging. Chassis Gnd.D.C. Gnd. SERDES CHIP SET HSDCC OR DB9 CONNECTOR VCC GND 120 200 VCC GND 75 Ω TRANSMISSION LINES Chassis Gnd.D.C. Gnd. TX+ TX- RX- RX+ Chassis Gnd. Chassis Gnd. .027 µF .027 µF TX+ TX- RX- RX+ A6801 DATE CODE CTRY ORIGIN 150 120 200