S558-5999-79 Просмотр технического описания (PDF) - Bel Fuse Inc.

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S558-5999-79

HIGH SPEED LAN MAGNETICS

Bel Fuse Inc. 

defining a degree of excellence

960010A

APPLICATION NOTES

HIGH SPEED LAN MAGNETICS

• Bel has designed these part types for use in either 100 Mbps or 10/100 Mbps multi-port applications, where the PHY

transceiver requires a list of recommended 1:1 transmit and receive isolation transformer ratios. Please refer to the Bel

short form catalog for recommendations of mating semiconductors. These dual, 2-port devices provide high isolation

transformers, signal wave shaping, fast but controlled rise times, EMI and common mode noise suppression. All part

types meet IEEE 802.3 standards, which includes a requirement for 350µH OCL (inductance) at 8mA DC bias applied.

Use of these Bel part types provides optimum space and cost per port efficiency with no sacrifice in performance

versus similar single port devices.

• Each dual, 2-port device is available with or without an impedance matching common mode termination. A balanced

board layout and precise selection of discrete components used in conjunction with the termination is critical for

proper functionality. For the background on how to correctly implement this termination, or for information on how to

eliminate this circuit entirely, please review Bel's separate application note.

• 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.

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

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