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. A556-5999-23 -12 -10 -0.5 -0.8 -1.1 -1.9 -50 -45 -25 -55 -50 -45 960039a mechanical schematic token ring networking components ? designed for use with texas instruments c380c30/c60 token ring transceivers ? complies with ieee 802.5 standards, including low frequency cutoff ? 2000 vrms isolation ? customized design featuring additional common mode suppression ? supports stp 150 ohm or utp 100 ohm cable electricals at 25oc return loss insertion loss common to common crosstalk (db) min (db) max mode rej (db) min (db) min part no. 1-17mhz 17-25mhz 4mhz 8mhz 16mhz 24mhz 5mhz 20mhz 200mhz 8mhz 16mhz 24mhz
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 960039a application notes application circuit token ring networking components ? this bel token ring networking component has been developed for use with the texas instruments c30 integrated comm processor and transceiver and c60 transceiver only. this bel module provides signal shaping and high voltage isolation, impedance matching, and emi and noise suppression for both transmit and receive channels. this module can be used in either 150 ohm stp or 100 ohm utp cable environments. ? 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. ? do not connect both utp and stp simultaneously. only one media connection can be supported at any one time. ? additional common mode chokes are available for further suppression of unwanted signals.
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