BEL S556-5999-01

defining a degree of excellence
TOKENRINGNETWORKING
COMPONENTS
• Designed for use with multiple Token Ring transceivers,
including Texas Instruments C380C30/C60
• IEEE 802.5 compliant
960042B
• Low profile, miniature surface mount packaging
• Cost efficient design approach
• STP/UTP compatible impedances
• For use with external on silicon integrated filtering
• Rated to meet 225ºC peak IR reflow temperature
ELECTRICALS AT 25ºC
Part No.
Turns Ratio
1-2-8 to
1-2-8 to
16-15-13-12
10-15-13-9
S556-5999-01
1CT:1CT
1CT:0.816CT
OCL
(µH) Min
1-8
616
Return Loss
(dB) Min
1-17MHz 17-25MHz
-16
-9
Insertion Loss
(dB Max)
4MHz 8MHz 16MHz 24MHz
-0.5
-0.8
-1.1 -1.9
Common to Common
Mode Rej (dB) Min
5MHz 20MHz 200MHz
-35
-35
-20
Ouput Impedance
1-3
16-12
10-9
150ý 150ý 100ý
SCHEMATIC
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: BelFuse@belfuse.com
Website: http://www.belfuse.com
defining a degree of excellence
960042B
TOKENRINGNETWORKING
COMPONENTS
APPLICATION CIRCUIT
APPLICATION NOTES
• Bel has developed this product for use with token ring 4/16 Mbps transceivers in 150 ohm STP and 100 ohm UTP
media applications; however, both the 150 ohm and 100 ohm connections cannot be simultaneous. The Bel module
provides isolation and impedance matching transformers plus common mode choke for either a transmit or receive
channel. External filtering is required.
• Suppression of board induced noise can be achieved with precision layout instructions, along with careful consideration
of the selection and placement of discrete components for the interface circuit.
• 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