primary leakage inductance interwinding dc part turns ratio inductance l l capacitance resistance hipot number (5%) ocl (h min) (nh max) c ww dcr (vrms min) @ 20m vrms, 100 khz (pf max) ( w max) A7802 1 : 1 42.0 100 6.0 .25 1500 note: modules are packaged in tubes unless tape & reel packaging is specified. add the suffix ?t? (such as A7802 t ) for tape & reel orders. tape & reel parts can only be ordered in multiples of 500 pieces. sonet/sdh dual line interface transformers for e4/stm-1 applications preliminary a103.p (8/99) mechanical schematic A7802 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 asia: tel 65 287 8998 web: http://www.pulseeng.com electrical specifications @ 25c ? operating temperature -40c to +85c weight . . . . . . .1.4 grams (max) tape & reel . . . . . . . . .500/reel tube . . . . . . . . . . . . . . .45/tube .420 10,67 A7802 date code country of origin .500 12,70 .018 x16 0,46 .350 8,89 .050 x7 1,27 .220 5,59 .015 0,38 .005 0,17 .295 7,49 .020 0,51 min 0 ? 8 suggested pad layout .350 8,89 .050 1,27 .090 2,29 .460 11,68 .280 7,11 .030 0,76 16 surfaces .004/0,10 14 16 3 1 1:1 t1 9 11 8 6 1:1 t2 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
amcc s3015/s3016 transformer input and output application amcc s3031b transformer input and output application xfmr drvb s3031b xfmr drva (transmitter) bufin (receiver) gnd gnd gnd A7802 1/2 of A7802 cable output monitor output xfmr drvb s3015 xfmr drva (transmitter) s3016 bufin (receiver) gnd gnd gnd cable output monitor output cable input A7802 1/2 of A7802 cable input typical application circuit of traditional coaxial link providing balanced (differential) to single-ended connection 37.5 vref 37.5 rx ry 330 tx ty 330 21.5 1:1 1 3 6 8 16 14 11 9 1:1 1 3 6 8 16 14 11 9 21.5 21.5 21.5 330 330 rx ry tx ty 37.5 vref 37.5 .027 f optional for more information : performance warranty of products offered on this data sheet is limited to the parameters specified. data is subject to change w ithout notice. other brand and product names mentioned herein may be trademarks or registered trademarks of their respective owners. preliminary a103.p (8/99) printed on recycled paper. ?1999, pulse engineering, inc. sonet/sdh dual line interface transformers for e4/stm-1 applications application notes: 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 trans- former 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 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. 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: united states (worldwide) 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 united kingdom (northern europe) 1 & 2 huxley road the surrey research park guildford, surrey gu2 5re united kingdom tel: 44 1483 401700 fax: 44 1483 401701 france (southern europe) zone industrielle f-39270 orgelet france tel: 33 3 84 35 04 04 fax: 33 3 84 25 46 41 taiwan, r.o.c. (northern asia) 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 singapore (southern asia) 150 kampong ampat #07-01/02 ka centre singapore 368324 tel: 65 287 8998 fax:65 280 0080 distributor
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