isdn u-interface transformers for lucent isdn u transceivers mechanical approved by lucent for t7234, t7237, t7256, and t7264 transceiver ics meets ansi t1.601-1992 and etsi etr 080 standards for longitudinal balance, linearity, and return loss minimum isolation: 2000 vrms recognized to ul 1459 and ul 1950 schematic turns ratio line side ocl dcr dcr isolation part number line:chip pins line side line side chip side idc voltage package (3%) (mh) ( ? )( ? ) (ma) (vrms min) T4008 1.50:1 (10-6) 73-98 13 20% 6.5 20% 40 2000 cap electrical specifications @ 25c ? operating temperature -40c to +85c cap dimensions: inches mm unless otherwise specified, all tolerances are .010 0,25 weight . . . . . . . . . . . . . .17.7 grams pan size . . . . . . . . . . . . . . .25/tray 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. printed on recycled paper. ?2003, pulse engineering, inc. all rights reserved. t616.a (10/03) note: common mode chokes for emi reduction are also available. recommended part numbers are either pe-68624 (surface mount) or pe-65944 (through hole) ? see data sheet g002. for north american applications when mlt circuit is utilized, dc current through the transformer is minimum. for these applicat ions, smaller size packages are available in both surface mount and through hole configurations. contact pulse applications engineering at (6 19) 674-8100 for more information. additional specifications return loss longitudinal balance surge voltage capability linearity (10 and 25 khz) (500 hz to 1.5 khz) 20 db min 281 hz to 40 khz 55 db min metallic @ 800 v peak 10/700 sec 55 db min ? above 40 khz -20 db/decade long. @ 2400 v peak 10/560 sec ? 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) 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 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 t4xxx date code suggested pcb layout (filled) 10x .110 2,79 4x .200 5,08 .480 .020 12,19 0,51 .800 20,32 .800 20,32 1.040 max 26,42 .400 10,16 .200 5,08 .800 20,32 .800 20,32 10x .025 .002 0,64 0,05 .900 22,86 1.045 max 26,54 10 5 6 1 79
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