defining a degree of excellence 10BASE-T NETWORK COMPONENTS 960070A • Family of designs offered with common footprint and pinout to accommodate customized EMI requirements • Designed for use with Level One LXT914/918/944 or Texas Instruments' Quad PHY TNETE 2004 10Base-T transceiver chipsets • Low profile surface mount packages, rated to 225ºC peak IR reflow temperature • Quad, 4-port design offers optimal space, performance and cost efficiency • 2000 Vrms isolation ELECTRICALS AT 25ºC Part No. S553-2940-04 S553-2940-10 S553-2940-11 Insertion Loss (dB) Max 1-10MHz OCL Inductance (µH) Min Return Loss (dB) Min 1MHz-10MHz Crosstalk (dB) Min 1MHz-10MHz -1.0 -1.0 -1.0 100 100 100 -18 -18 -18 -40 -40 -40 CM-CM Rej (dB) Min 10-30MHz 100MHz -40 -40 N/A Schematic -30 -30 N/A A B C SCHEMATICS A B C MECHANICAL Specifications subject to change without notice. Bel Fuse Inc. 198 Van Vorst Street, Jersey City, NJ 07302 • Tel: 201-432-0463 • Fax: 201-432-9542 • E-Mail: [email protected] Website: http://www.belfuse.com defining a degree of excellence 10BASE-T NETWORK COMPONENTS 960070A APPLICATION CIRCUIT APPLICATION NOTES • Bel has developed a variety of quad, 4-port part types for use with Level One and Texas Instrument quad, 4-port PHY transceivers 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 4 channels of transmit and receive transformers to provide for 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. • 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. • These designs have been optimized for board layouts using stackable or "double decker" RJ-45 connectors in order to keep traces short and straight. Corporate Office Bel Fuse Inc. 198 Van Vorst Street, Jersey City, NJ 07302-4496 Tel: 201-432-0463 Fax: 201-432-9542 E-Mail: [email protected] 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