part turns ratio ocl line side c w / w l l package/ number (pri:sec 2%) (mh min) (pf max) (h max) schematic tx rx e xtended t emperature r ange m odel ? o perating t emperature -40c to +85c tx9027 1:2 1:2 1.2 30 .5 qtera t691.a (8/04) t1/cept/isdn-pri transformers quad port smt transformer modules with ic side protection electrical specifications @ 25c
eight transformers in a low profile surface mount package includes ic side protection circuit on each channel to suppress low voltage transients compatible with pmc-sierra?s pm 4329 hdliu low dcr patented ?interlock base? construction for high reliability minimum isolation voltage: 1500 vrms
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mechanical schematic qtera weight ...............5.0 grams tape & reel ..........250/reel tube ......................15/tube note: the crosstalk attenuation is typically 50 db or better. dimensions: inches mm unless otherwise specified, all tolerances are .010 0,25 us 858 674 8100 ? ? uk 44 1483 401 700 ? ? france 33 3 84 35 04 04 ? ? singapore 65 6287 8998 ? ? taiwan 886 2 2698 0228 ? ? hong kong 852 2788 6588 ? ? http://www.pulseeng.com
t1/cept/isdn-pri transformer quad port smt transformer module with ic side protection 1. flammability ? materials used in the products are recognized as ul94-vo approved. products meet the requirements of iec 695-2-2 (needle flame test). 2. balance characteristics ? the transformers meet the require- ments for longitudinal balance of fcc part 68. 3. common mode rejection ratio ? the cmrr for all transformers is better than 50 db at 1 mhz. a typical test circuit is shown below. 4. crosstalk attenuation ? in the dual packages, which contain transmit and receive transformers side by side, sufficient crosstalk attenuation is achieved by the inherent characteristics of the toroid cores as well as by their proper positioning. the crosstalk attenua- tion is typically 50 db or better from 100 khz to 10 mhz. this result was established with the test circuit shown below. 5. return loss ? itu-t g.703 and european national regulatory documents specify minimum return loss levels. the transformers will allow these limits to be complied within the situations where they are applicable. frequency 50-100 khz 100 khz-2 mhz 2-3 mhz return loss xmit 9 db 15 db 11 db rec 12 db 18 db 14 db 6. surge voltage capability ? all transformers and chokes meet surge voltage tests according to the most stringent regulatory documents when system designs include the proper voltage and current suppression devices. 7. isolation voltage ? 100% of transformers are tested during production to the specified isolation voltage level. 8. general information ? the tx9027 is specifically designed for use in 1.544 mbps (t1), 2.048 mbps (cept) and isdn primary rate (pri) interface applications. use of the proper transformer allows the interface circuit to comply with itu-t g.703 and other standards regarding pulse waveform, return loss, and balance. hp-8751a p1 p2 50:100 balun 100:50 balun xfmr 50:100 balun 100:50 balun xfmr hp-8751a p1 p2 100 100 application notes united states (worldwide) 12220 world trade drive san diego, ca 92128 u.s.a. http://www.pulseeng.com tel: 858 674 8100 fax: 858 674 8262 united kingdom (northern europe) 5 huxley road 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 6287 8998 fax: 65 6280 0080 hong kong (china/hong kong) 9/f, phase 2, tai sang shatin warehouse centre 6 wong chuk yeung street fotan, shatin, hong kong tel: 852 2788 6588 fax: 852 2776 1055 distributor t691.a (8/04) for more information : ?2004, pulse engineering, inc. all rights reserved. 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 products and/or registered trademarks of their respective owners.
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