part turns ratio ocl c w / w l l package/ number (pri:sec 5%) (mh min) (pf max) (h max) schematic tx rx t9021 1:2.42 1:2.42 0.6 & 0.6 35 & 35 .60 & .60 qtera t1/cept/isdn-pri transformer quad port smt transformer module with ic side protection electrical specifications @ 25c ? operating temperature 0c to +70c 1:2.42 40 1 vg vg vg vg 1:2.42 1:2.42 1:2.42 1:2.42 1:2.42 1:2.42 1:2.42 39 2 38 3 37 4 36 5 35 6 34 7 33 8 32 9 31 10 30 11 29 12 28 13 27 14 26 15 25 16 24 17 23 18 22 19 21 20 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 comet chip (pm4354) patented ?interlock base? construction for high reliability ic grade transfer-molded package withstands 235c ir reflow minimum isolation voltage: 1500 vrms ul 1950 recognized
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mechanical schematic qtera weight ...............5.0 grams tape & reel ..........250/reel tube ......................15/tube note: tx = transmit channel. rx = receive channel dimensions: inches mm unless otherwise specified, all tolerances are .010 0,25 usa 858 674 8100 ? ? germany 49 7032 7806 0 ? ? singapore 65 6287 8998 ? ? shanghai 86 21 54643211 / 2 ? ? china 86 755 33966678 ? ? taiwan 886 3 4641811 www.pulseeng.com t657.b (8/07)
t1/cept/isdn-pri transformer quad port smt transformer module with ic side protection 1. et product ? all coils have an et product of 10 v-sec minimum. 2. flammability ? materials used in the products are recognized as ul94-vo approved. products meet the requirements of iec 695-2-2 (needle flame test). 3. balance characteristics ? the transformers meet the require- ments for longitudinal balance of fcc part 68. 4. common mode rejection ratio ? the cmrr for all transformers is better than 50 db at 1 mhz. a typical test circuit is shown below. 5. 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. 6. 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 7. 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: metallic voltage: 800 v peak, 10/560 sec longitudinal voltage: 2,400 v peak, 10/700 sec 8. isolation voltage ? 100% of transformers are tested during production to the specified isolation voltage level. 9. general information ? the t9021 is specifically designed for use in 1.544 mbps (t1), 2.048 mbps (cept) and isdn primary rate (pri) interface applications. they are matched to the majority of the line interface transceiver ics currently available. 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. 10. diode vendor does not recommend connecting directly to vcc. 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 for more information: pulse worldwide headquarters 12220 world trade dr. san diego, ca 92128 u.s.a. www.pulseeng.com tel: 858 674 8100 fax: 858 674 8262 pulse south asia 150 kampong ampat #07-01/02 ka centre singapore 368324 tel: 65 6287 8998 fax: 65 6280 0080 pulse north asia no. 26 kao ching rd. yang mei chen tao yuan hsien taiwan, r. o. c. tel: 886 3 4641811 fax: 886 3 4641911 pulse china headquarters b402, shenzhen tech-innovation international tenth kejinan rd. high-tech industrial park nanshan district, shenzhen china tel: 86 755 33966678 fax: 86 755 33966700 pulse north china room 1503 xinyin building no. 888 yishan rd. shanghai 200233 china tel: 86 21 54643211/2 fax: 86 21 54643210 pulse europe einsteinstrasse 1 d-71083 herrenberg germany tel: 49 7032 7806 0 fax: 49 7032 7806 12 www.pulseeng.com t657.b (8/07) 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. ? copyright, 2007. pulse engineer ing, inc. all rights reserved.
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