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.
A556-5999-23
-12
-10
-0.5
-0.8
-1.1
-1.9
-50
-45
-25
-55
-50
-45
960039A
MECHANICAL
SCHEMATIC
TOKEN RING NETWORKING
COMPONENTS
Designed for use with Texas Instruments
C380C30/C60 token ring transceivers
Complies with IEEE 802.5 standards, including low
frequency cutoff
2000 Vrms isolation
Customized design featuring additional common mode
suppression
Supports STP 150 ohm or UTP 100 ohm cable
ELECTRICALS AT 25C
Return Loss
Insertion Loss
Common to Common
Crosstalk
(dB) Min
(dB) Max
Mode Rej (dB) Min
(dB) Min
Part No.
1-17MHz 17-25MHz
4MHz 8MHz 16MHz 24MHz
5MHz 20MHz 200MHz
8MHz 16MHz 24MHz
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
960039A
APPLICATION NOTES
APPLICATION CIRCUIT
TOKEN RING NETWORKING
COMPONENTS
This Bel token ring networking component has been developed for use with the Texas Instruments C30 integrated
comm processor and transceiver and C60 transceiver only. This Bel module provides signal shaping and high voltage
isolation, impedance matching, and EMI and noise suppression for both transmit and receive channels. This module
can be used in either 150 ohm STP or 100 ohm UTP cable environments.
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.
Do not connect both UTP and STP simultaneously. Only one media connection can be supported at any one time.
Additional common mode chokes are available for further suppression of unwanted signals.
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