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. schematics 960014a s553-5999-28 -1.0 50 200 -16 -40 -40 -35 -30 a s553-5999-31 -1.0 50 200 -16 -40 -40 -35 -30 b S553-5999-78 -1.0 50 200 -16 -40 -40 -35 -30 c s553-5999-79 -1.0 50 200 -16 -40 n/a n/a n/a d ? designed for use with national semiconductor's dp83959 10base-t phy transceiver, which incorporates digital filtering in the silicon ? family of quad, 4-port designs utilizing common footprints and pinouts, offering choice of common mode choke topologies a 10base-t network components quad 4-port modules ? low profile, surface mount packaging, rated to 225oc peak ir reflow temperature ? cost and space efficient design solution ? 2000 vrms isolation b electricals at 25oc insertion loss ocl (inductance) return loss crosstalk cm-cm rej (db) max (h) min (db) min (db) min (db) min part no. 1-10mhz tx rx 5mhz-10mhz 100khz-30mhz 5-10mhz 10-30mhz 30-100mhz schematic
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. mechanical c d schematics (cont'd) 960014a 10base-t network components quad 4-port modules
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. application circuit 10base-t network components quad 4-port modules 960014a please refer to national semiconductor's application note for detailed circuit schematic.
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 960014a application notes 10base-t network components quad 4-port modules ? bel has developed a variety of quad, 4-port part types for use with national semiconductor's product line of quad, 4- port phy devices that incorporate digital filtering techniques within the silicon itself. bel's "filterless magnetics" are optimized for this specific application and create a very cost efficient design solution. each bel part type contains transmit and receive transformers to provide for signal wave shaping, high voltage isolation and emi noise suppression. ? bel has designed these parts as a family of parts with common footprint and pinouts to enable the designer to customize the use of common mode choke for optimum system performance. ? the pinout of these devices is most commonly used in applications with double-decker or stacked rj-45 connectors. ? in multi-port system applications, good pcb layout and proper grounding techniques are very critical to achieve fcc class a and b equipment approvals. bel recommendations are available and can be provided by contacting our engineering department or your local sales representative. ? 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.
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