S558-5999-50 데이터 시트보기 (PDF) - Bel Fuse Inc.

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S558-5999-50

HIGH SPEED LAN MAGNETICS

Bel Fuse Inc. 

defining a degree of excellence

960021A

APPLICATION CIRCUIT

HIGH SPEED LAN MAGNETICS

APPLICATION NOTES

• These Bel part types have been designed for use in 100 Mbps or 10/100 Mbps data transmission systems over

category 5 UTP/STP cable. Each Bel part type provides superior EMI noise suppression, high voltage isolation,

wave shaping and fast, but controlled rise times. All parts meet IEEE 802.3 standards, which includes 350µH OCL

(inductance) when 8mA of DC bias is applied.

• These Bel part types have been tested and qualified for use with the Quality Semiconductor 6611 transceiver in

adapter card applications. No impedance matched common mode termination is recommended since proper

implementation of this type of circuit requires quiet grounding, not readily available in adapter card applications. Bel

also provides dual, 2-port (S558-5999-83) and quad, 4-port (S558-5999-77) designs for multi-port applications to

provide board space and cost efficiency with no performance degradation. These dual and quad devices can be

found on Bel data sheet 960009. Since the transmit turns ratio of the S558-5999-83 and -77 is 1.23:1 (due to the

specifications of the QSI 6612 chipset), implementation with the QSI 6611 is accomplished using slightly higher

current achieved by changing the 5 volt resistors from 100ý to 86ý and the IREF resistor from 4.75ý to 4.53ý.

• 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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