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defining a degree of excellence  
TOKENRINGNETWORKING  
COMPONENTS  
960040A  
• Designed for use with Texas Instruments  
TIC380C30/C60 token ring transceivers  
• SpaceefficientSIPpackagingformulti-porthubrepeater  
and switch applications  
• Complies with IEEE 802.5 standards  
• Supports STP 150 ohm or UTP 100 ohm cable  
ELECTRICALS AT 25ºC  
Insertion Loss  
(dB) Max  
Attenuation  
(dB) Min  
Return Loss (dB) Min  
TX/RX  
Common to Common  
Mode Rej (dB) Min  
Common to Dif  
Mode Rej (dB) Min  
Crosstalk  
(dB) Min  
Turns  
Ratio  
Part No.  
1-8MHz 16MHz 24MHz 33MHz 36MHz 44MHz 100MHz 1-6MHz 6-17MHz 17-24MHz 5MHz 20MHz 70MHz 200MHz 1-4MHz 10MHz 30MHz 100MHz 1-4MHz 10-16MHz 25MHz  
0556-5841-01  
0556-5841-02  
0556-5841-06  
0556-5841-07  
1.22:1 -0.6 -0.8 -1.9  
1.22:1 -0.6 -0.8 -1.9  
1.22:1 -0.5 -0.8 -1.7  
1.22:1 -0.6 -0.8 -1.9  
-7 -25 -30 -25 -14/-23 -12/-20 -8/-17 -45 -30 -30 -20  
-7 -25 -30 -25 -14/-23 -12/-20 -8/-17 N/A N/A N/A N/A  
-7 -25 -18 -25 -14/-23 -12/-20 -8/-17 -45 -30 -30 -20  
-7 -25 -25 -25 -14/-23 -12/-20 -8/-17 -45 -30 -30 -20  
-50 -40 -30 -25 -50 -40 -35  
N/A N/A N/A N/A -50 -40 -35  
-50 -40 -30 -25 -50 -40 -35  
-50 -40 -30 -25 -50 -40 -35  
SCHEMATICS  
0556-5841-01  
0556-5841-07  
0556-5841-02  
0556-5841-06  
MECHANICALS  
0556-5841-01  
0556-5841-02  
0556-5841-07  
0556-5841-06  
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  
TOKENRINGNETWORKING  
COMPONENTS  
960040A  
APPLICATION CIRCUIT  
APPLICATION NOTES  
• Bel has created these products for use with token ring 4/16 Mbps chipsets developed by Texas Instruments in 150 ohm  
STP and 100 ohm UTP media applications; however, both the 150 ohm and 100 ohm connections cannot be used  
simultaneously. The Bel modules provide internal filter networks on the transmit channels, in addition to both transmit  
and receive high voltage isolation transformers, plus common mode chokes on both channels for EMI and noise  
suppression.  
• 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.  
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  
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  
San Po Kong  
Kowloon, Hong Kong  
Tel: 852-2328-5515  
Fax: 852-2352-3706