defining a degree of excellence bel fuse inc. 198 van vorst street, jersey city, nj 07302 ? tel: 201-432-0463 ? fax: 201-432-9542 ? e-mail: belfuse@belfuse.com website: http://www.belfuse.com specifications subject to change without notice. S553-5999-41 1ct:1ct -16 -9 -0.5 -0.8 -1.1 -1.9 -35 -35 -20 mechanical schematic 960044b ? designed for use with token ring transceivers developed by texas instruments ? integrated transformer and common mode choke ? compliant with ieee 802.5 standards ? single channel transmit or receive version of s553- 5999-40 ? robust surface mount packaging rated to meet 225oc peak ir reflow temperature ? for use in either 100 ohm utp or 150 ohm stp media systems token ring networking components electricals at 25oc return loss insertion loss common to common turns (db) min (db) max mode rej (db) min part no. ratio 1-17mhz 17-25mhz 4mhz 8mhz 16mhz 24mhz 5mhz 20mhz 200mhz
defining a degree of excellence corporate office bel fuse inc. 198 van vorst street, jersey city, nj 07302-4496 tel: 201-432-0463 fax: 201-432-9542 e-mail: belfuse@belfuse.com internet: http://www.belfuse.com far east office bel fuse ltd. 8f/8 luk hop street san po kong kowloon, hong kong tel: 852-2328-5515 fax: 852-2352-3706 european office bel fuse europe ltd. preston technology management centre marsh lane, preston pr1 8ud lancashire, u.k. tel: 44-1772-556601 fax: 44-1772-888366 960044b application notes application circuit token ring networking components ? bel has created this product for use with token ring 4/16 mbps transceivers developed by texas instruments and madge. the impedance of this part has been optimized for use in either 100 ohm utp or 150 ohm stp media applications. the bel module provides isolation and impedance matching transformers plus common mode choke for either a transmit or receive channel. external filtering is required. ? suppression of board induced noise can be achieved with precision layout instructions, along with careful consideration of the selection and placement of discrete components for the interface circuit. ? bel's low profile, surface mount packaging is ideal for high speed pick and place machinery. parts can be shipped on tape and reel for high speed placement. construction processes have been implemented for thermal compatibility with high temperature ir reflow assembly processing. post dipping of leads assist with pc board solderability. each part is optically inspected to meet rigid coplanarity requirements. ? ocl (inductance) of this transformer is 616 h minimum. optional lower inductance values can be made available.
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