defining a degree of excellence
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
Specifications subject to change without notice.
MECHANICAL
SCHEMATICS
S553-5841-03
100
-1.0
N/A
N/A
N/A
-20
-40
-40
-30
A
S556-5841-09
100
-1.0
-1.0
-8.0
-20
-20
-40
-40
-30
B
960048B
Designed for use with AMD multi-port 10Base-T
transceiver chipsets, such as the eIMR (79C984A),
eIMR+ (79C985) and QuIET (79C988)/IMR2 (79C983)
where digital filtering has been incorporated into the
silicon
Dual, 2-port (filterless) designs provide cost, space
and performance efficiencies
2000 Vrms isolation
Compliant with IEEE 802.3 standards
Additional differential filtering design available
Robust surface mount packaging, rated to 225C peak
IR reflow temperature
A
10BASE-T NETWORK COMPONENTS
B
ELECTRICALS AT 25C (each channel)
Insertion Loss
Attenuation
Return Loss
Crosstalk
CM-CM Rej
OCL
(dB) Max
(dB) Min
(dB) Min
(dB) Min
(dB) Min
Part No.
(H) Min
1-10MHz
30MHz 50MHz 80MHz
5MHz-10MHz
1MHz-10MHz
10-30MHz 30-100MHz
Schematic
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
APPLICATION CIRCUIT
960048B
10BASE-T NETWORK COMPONENTS
Bel has developed these part types for use with AMD's product line of quad, 4-port PHY devices 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 2 channels of transmit and receive
transformers to provide for wave shaping, high voltage isolation and EMI noise suppression. In certain applications,
compliance with IEEE 802.3 standards may required additional differential filtering (Bel P/N S556-5841-19).
Bel has designed these parts as a family of parts with common footprint and pinouts to enable the designer to
customize the use of additional differential filtering 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.
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