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

APPLICATION NOTES

• 0556-1060-00 is for use with 0558-1060-00 and the S556-1060-01 is for use with S558-1060-01.

• These Bel designs are for use with Microlinear 100 Mbps and various 10Base-T PHY devices that may require

external filtering. Microlinear provides the following recommendations:

Internal

Internal

MAC

Microlinear

MII

SYM

10 BT

10 BT Filters

7-Wire

DEC21140

6692, 2653





DEC21142

6692



DEC21143

6698





AM79C971

6692





I82557

6692, 2653

MC91C100

6692, 2653



MX98713

6698







TNETE100

6692





*I82557 muxes the MII and the 7-wire signals.

• Vcc operating voltage of the Bel magnetics modules is recommended to be 5 volts, +/-5%.

• Two 1ký resistors are recommended to provide bias voltage to the Microlinear chipset.

• 0.1µF DC blocking capacitors are recommended to provide isolation between the 10 Mbps and 100 Mbps PHY

transceivers.

960016B

HIGHSPEEDLANMAGNETICS