SONET/SDH Dual Line Interface Transformers for E4/STM-1 Applications Compliant with ITU-T/G.703 Supports 139.264 (E4) and 155.52 (STM-1) Mbps for Coded Mark Inversion (CMI) interfaces Designed to interface with AMCC's chip sets S3015/S3016 and S3031B for use with 75 W coaxial cable Dual design supports transmit and receive circuitry or PHY chip transmit cable and monitor outputs Fast rise time and low signal distortion Electrical Specifications @ 25C -- Operating Temperature -40C to +85C Part Number Turns Ratio (5%) A7802 1:1 Primary Inductance OCL (H MIN) @ 20m Vrms, 100 kHz 42.0 Leakage Inductance LL (nH MAX) 100 Interwinding Capacitance CWW (pF MAX) 6.0 DC Resistance DCR (W MAX) .25 Hipot (Vrms MIN) 1500 Note: Modules are packaged in tubes unless Tape & Reel packaging is specified. Add the suffix "T" (such as A7802T) for Tape & Reel orders. Tape & Reel parts can only be ordered in multiples of 500 pieces. Mechanical Schematic A7802 .090 2,29 .350 8,89 .050 1,27 .500 12,70 1:1 1 .460 .280 11,68 7,11 .295 .420 7,49 10,67 A7802 DATE CODE 16 COUNTRY OF ORIGIN .030 0,76 .050 x7 1,27 3 14 T1 SUGGESTED PAD LAYOUT 1:1 .350 8,89 6 11 .220 5,59 8 .005 0,17 .015 0,38 .004/0,10 .018 x16 0,46 16 SURFACES .020 MIN 0,51 Dimensions: Inches mm Unless otherwise specified, all tolerances are .010 0,25 U.S.A: TEL 858 674 8100 EUROPE: TEL 441 483 401 700 9 T2 0 - 8 Weight . . . . . . .1.4 grams (max) Tape & Reel . . . . . . . . .500/reel Tube . . . . . . . . . . . . . . .45/tube * ASIA: TEL 65 287 8998 WEB: http://www.pulseeng.com PRELIMINARY A103.P (8/99) SONET/SDH Dual Line Interface Transformers for E4/STM-1 Applications Application Notes: Return Loss is typically greater than -17 dB with 75 W load (can be affected by circuit board layout and other external electrical parasitics). With traditional coaxial links, the transformer also provides a balanced (differential) to single-ended connection between the transmitter/receiver IC and the coax. Pulse has designed the A7802, SONET/SDH dual line interface transformer specifically for high-speed, STM-1/E4 serial data interfaces utilizing 75 W coaxial cable. The isolation transformer protects the station from static charges that may develop on the cable and prevents ground loop currents from being transferred between stations. The device has also been designed to provide inherent common rejection within the transmission Pass Band and thus reduce EMI. The high bandwidth of this transformer minimizes data dependent jitter (DDJ) by providing fast signal rise times with minimal signal distortion. Insertion Loss is typically less than -3 dB within .20 - 330 MHz Pass Band and The dual package allows connections of both transmit and receive channels or dual transmit (cable output and monitor output) channels as shown in the Application Circuits below. The auto-insertable, SMD packaging allows for a cost-effective solution for the application. Application Circuits: S3015 S3031B A7802 XFMR DRVA CABLE OUTPUT (TRANSMITTER) A7802 XFMR DRVA CABLE OUTPUT (TRANSMITTER) GND GND XFMR DRVB XFMR DRVB MONITOR OUTPUT MONITOR OUTPUT GND S3016 GND 1/2 OF A7802 BUFIN 1/2 OF A7802 BUFIN CABLE INPUT (RECEIVER) CABLE INPUT (RECEIVER) GND GND AMCC S3015/S3016 TRANSFORMER INPUT AND OUTPUT APPLICATION 21.5 W TX 330 W 21.5 W TY 1 AMCC S3031B TRANSFORMER INPUT AND OUTPUT APPLICATION 1 16 16 37.5 W RX VREF 3 14 3 14 6 11 6 11 37.5 W RY 330 W RX VREF RY 21.5 W TX 37.5 W 8 37.5 W 8 9 1:1 9 1:1 330 W 21.5 W TY 330 W .027 F OPTIONAL For More Information : TYPICAL APPLICATION CIRCUIT OF TRADITIONAL COAXIAL LINK PROVIDING BALANCED (DIFFERENTIAL) TO SINGLE-ENDED CONNECTION UNITED STATES (Worldwide) UNITED KINGDOM (Northern Europe) FRANCE (Southern Europe) SINGAPORE (Southern Asia) TAIWAN, R.O.C. (Northern Asia) 12220 World Trade Drive San Diego, CA 92128 Quick-Facts: 619 674 9672 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: 65 287 8998 FAX:65 280 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 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. PRELIMINARY A103.P (8/99)