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TOKEN RING MAGNETICS  
Filter Modules  
LM00601  
•
Designed to meet IEEE 802.5 Token Ring standards,  
including low cut off frequency  
•
•
•
•
STP/UTP compatible impedances  
Integrated transformers and common mode chokes  
Support TI and Microlinear transceiver ICs  
•
•
Rated to 225° C peak IR refow temperature  
Operating temperature 0° to 70° C  
Minimum interwinding breakdown voltage of 500 Vrms  
ELECTRICAL SPECIFICATIONS AT 25° C  
Insertion Loss  
Return Loss  
dB min  
Common to Common Mode Rejection  
dB min  
Crosstalk  
dB min  
dB max  
Part Number  
1MHz to  
17MHz  
17MHz to  
24MHz  
8MHz  
16MHz 24MHz  
5MHz  
20MHz  
70MHz 200MHz 4MHz  
16MHz 25MHz  
TX  
RX  
TX  
RX  
TX  
RX  
TX  
RX  
TX  
RX  
-0.6  
-0.5  
-0.6  
-0.5  
-0.6  
-1.0  
-0.6  
-0.5  
-0.6  
-0.5  
-0.8  
-0.5  
-0.8  
-0.5  
-1.0  
-1.0  
-0.8  
-0.5  
-0.8  
-0.5  
-1.9  
---  
-12  
-8  
-20  
-17  
-20  
-17  
-17  
-17  
-20  
-17  
-20  
-17  
0556-5338-00  
0556-5841-07  
S556-5999-51  
0556-5841-06  
0556-5841-02  
-45  
-30  
-30  
-30  
-30  
-30  
---  
-20  
-20  
-20  
-20  
---  
-50  
-50  
-50  
-50  
-50  
-40  
-40  
-50  
-40  
-40  
-38  
-38  
-46  
-38  
-38  
-1.9  
---  
-12  
-8  
-45  
-30  
-45  
---  
-30  
-30  
-30  
---  
-1.8  
-1.0  
-1.9  
---  
-16  
-9  
-12  
-8  
-1.9  
---  
-12  
-8  
©2000 Bel Fuse Inc. Specifications subject to change without notice. 01.00  
Bel Fuse Inc. 198 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com  
L6-5  
TOKEN RING MAGNETICS  
Filter Modules  
LM00601  
SCHEMATICS  
0556-5338-00  
13  
12  
STPOUTA  
UTPOUTA  
DROUTA 10  
DROUTB 8  
15  
UTPOUTB  
14 STPOUTB  
5
PH+  
0.1 µF  
CHGND  
16  
0.1 µF  
11  
6
PH-  
RX+ 1  
19 RS+  
20  
RU+  
17 RU-  
RX- 2  
18  
RS-  
TX 1 : 1 (10 - 8 : 13 - 14)  
1 : 0.813 (10 - 8 : 12 - 15)  
RX 1 : 1 (10 - 8 : 13 - 14)  
1 : 0.813 (10 - 8 : 12 - 15)  
3
PHR+  
0.1 µF  
4
PHR-  
0556-5841-07  
1 : 1.23  
TX1+  
TX1-  
14 TXO+  
2
4
13  
9
TXO-  
PHA  
TXCT 5  
10 PHB  
12  
RXO+  
6
RX1+  
RXCT 7  
11 RX1-  
8
RXO-  
1 : 1.23  
TX 1 : 1.23 (2 - 4 : 14 - 13)  
RX 1 : 1.23 (6 - 8 : 12 - 11)  
©2000 Bel Fuse Inc. Specifications subject to change without notice. 01.00  
Bel Fuse Inc. 198 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com  
L6-6  
TOKEN RING MAGNETICS  
Filter Modules  
LM00601  
SCHEMATICS  
S556-5999-51  
Receive  
1
Transmit  
16  
15  
2
3
14  
1 : 1  
2 : 1  
4
5
6
13  
12  
11  
10  
9
7
8
0556-5841-06  
4
1
FOUT  
FIN  
2
3
FOUTL  
TXOUT  
FINL  
5
FGND  
1.22 : 1  
TX1+  
9
20  
12  
TPHA  
TXCT 11  
13  
TPHB  
19 TXOUTL  
TX1- 10  
1.22 : 1  
RXO+  
6
8
7
18  
RXIN  
15  
RPHA  
RXCT  
RXO-  
14  
RPHB  
17  
RXINL  
©2000 Bel Fuse Inc. Specifications subject to change without notice. 01.00  
Bel Fuse Inc. 198 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com  
L6-7  
TOKEN RING MAGNETICS  
Filter Modules  
LM00601  
SCHEMATICS  
0556-5841-02  
1.22 : 1  
14  
13  
12  
11  
TX1+ 1  
TXO+  
PHA  
0.1 µF  
PHB  
TX1-  
2
3
TXO-  
TXCT  
1.22 : 1  
10  
9
RXI+  
RXO+ 4  
PRETA  
PRETB  
RXI-  
0.1 µF  
5
RXCT  
8
7
RXO- 6  
MECHANICALS  
0556-5338-00  
1.100  
[27.94]  
0.600  
[15.24]  
0.025  
[0.64]  
Stand Off  
0.325  
[8.26]  
0.130 ±0.010  
[3.30 ±0.25]  
0.050  
[1.27]  
0.020 [0.51] typ  
0.100  
[2.54]  
0.010  
[0.25]  
typ  
0.100  
[2.54]  
0.900  
[22.86]  
0.500  
[12.70]  
Dimensions are in inches [millimeters].  
Standard dimension tolerance is ±0.005 [0.13] unless otherwise noted.  
©2000 Bel Fuse Inc. Specifications subject to change without notice. 01.00  
Bel Fuse Inc. 198 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com  
L6-8  
TOKEN RING MAGNETICS  
Filter Modules  
LM00601  
MECHANICALS  
0556-5841-02  
0556-5841-07  
0.275  
[6.99]  
max  
1.505  
[38.23]  
max  
0.400  
[10.16]  
max  
0.125 - 0.150  
[3.18 - 3.81]  
0.025  
[0.64]  
0.130 ±0.020  
[3.30 ±0.51]  
0.018 [0.46]  
0.100 [2.54] typ  
1.300 ±0.020  
[33.02 ±0.51]  
Dimensions are in inches [millimeters].  
Standard dimension tolerance is ±0.005 [0.13] unless otherwise noted.  
0556-5841-06  
1.150  
[29.21]  
0.275  
[6.99]  
0.400  
[10.16]  
0.020  
[0.51]  
0.085 - 0.115  
[2.16 - 2.92]  
0.020  
[0.51]  
0.018  
[0.46]  
0.050 [1.27] typ  
0.100  
[2.54]  
0.110 ±0.020  
[2.79 ±0.51]  
0.950  
[24.13]  
Dimensions are in inches [millimeters].  
Standard dimension tolerance is ±0.005 [0.13] unless otherwise noted.  
©2000 Bel Fuse Inc. Specifications subject to change without notice. 01.00  
Bel Fuse Inc. 198 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com  
L6-9  
TOKEN RING MAGNETICS  
Filter Modules  
LM00601  
MECHANICALS  
S556-5999-51  
±
0.020 0.002  
0.040  
[1.02]  
0.148  
[3.76] ref  
±
0.100 [2.54]  
[0.51 0.05]  
0.550  
[13.97]  
0.395  
[10.03]  
0.070  
[1.78]  
0.100 [2.54]  
1.000  
Suggested PCB Pad Layout  
[25.40] max  
0.010 - 0.015  
[0.25 - 0.38]  
0.325  
[8.26] ref  
0.350  
[8.89] max  
0.004 [0.10]  
0˚- 4˚  
0.500  
[12.70]  
0.700  
[17.78]  
0.035  
[0.89]  
Dimensions are in inches [millimeters].  
Standard dimension tolerance is ±0.005 [0.13] unless otherwise noted.  
©2000 Bel Fuse Inc. Specifications subject to change without notice. 01.00  
CORPORATE  
FAR EAST  
EUROPE  
Bel Fuse Inc.  
Bel Fuse Ltd.  
Bel Fuse Europe Ltd.  
198 Van Vorst Street  
Jersey City, NJ 07302  
Tel 201-432-0463  
Fax 201-432-9542  
www.belfuse.com  
8F / 8 Luk Hop Street  
San Po Kong  
Kowloon, Hong Kong  
Tel 852-2328-5515  
Fax 852-2352-3706  
www.belfuse.com  
PrestonTechnology Management Centre  
Marsh Lane, Suite F23, Preston  
Lancashire, PR1 8UD, U.K.  
Tel 44-1772-556601  
Fax 44-1772-888366  
www.belfuse.com  
L6-10