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HDSL & MDSL MAGNETICS  
For Level One  
TM9954  
Optimized for use with Level One’s SK70704, SK70706,  
SK70707, SK70708, SK70720, SK70721 and LXK70301  
transceiver ICs  
Designed for HDSL and MDSL environments supporting  
data rates from 272 Kb/s to 1168 Kb/s  
Minimum interwinding breakdown voltage of 1500 Vrms  
Designed to support modem, router and switch  
applications  
ELECTRICAL SPECIFICATIONS at 25° C  
DCR  
max  
Harmonic  
Distortion  
dB typ  
Turns Ratio Inductance  
± 3%  
mH ±10%  
Leakage  
Inductance  
µH max  
Return Loss  
dB min  
Part Number  
5KHz,  
2.1Vrms  
Chip : Line  
1CT : 1.8CT  
1CT : 1.8CT  
1CT : 1.8CT  
1CT : 1.8CT  
1 : 1.8CT  
Line Side  
Chip Side  
Line Side  
40KHz - 320KHz  
16.5  
0560-6600-12  
0560-6600-13  
0560-6600-15  
0560-6600-18  
0560-6600-23  
2
2.75  
2.75  
11  
4.5  
4.5  
6.0  
15  
9
2
2
3
3
3
3.8  
3.8  
6
70  
70  
70  
70  
70  
40KHz - 200KHz  
20  
40KHz - 200KHz  
20  
6
----  
40KHz - 200KHz  
20  
5
6
SCHEMATICS  
0560-6600-12  
0560-6600-13  
0560-6600-15  
0560-6600-18  
0560-6600-23  
10  
2
2
10  
4
6
Line  
Side  
Chip  
Side  
Chip  
Side  
Chip  
Side  
Line  
Side  
9
7
Line  
Side  
3
3
8
7
9
4
4
6
6
2
10  
Pins 9 and 7 connected to  
form line side center tap  
©1999 Bel Fuse Inc. Specifications subject to change without notice. 06.99  
Bel Fuse Inc. 198 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com  
T508  
HDSL & MDSL MAGNETICS  
For Level One  
TM9954  
.800  
[20.32]  
±.015  
MECHANICALS  
transparent  
Mylar  
insulator  
.100  
[2.54]  
min  
0560-6600-12  
0560-6600-13  
0560-6600-15  
0560-6600-18  
.470 [11.94]  
max  
Pin 1 reference notch  
1
10  
9
.600  
[15.24]  
±.015  
2
3
.920  
[23.37]  
max  
8
.150  
[3.81]  
±.010  
4
7
6
5
.900 [22.86]  
ref  
Notes:  
Coil form is UL 94 V0 rated  
Pins are tin copper alloy  
0560-6600-23  
1.070 [27.18]  
max  
0.547  
[13.90]  
max  
0.535  
[13.60]  
max  
Standard dimension tolerance is ±0.005 [0.13] unless otherwise noted.  
0.526 [13.36]  
max  
0.185 [4.70] max  
0.394  
[10.01]  
0.024 [0.61] dia  
0.098  
10  
[2.50]  
typ  
1
5
6
Notes:  
Coil form is UL 94 V0 rated  
Pins are tin copper alloy  
Standard dimension tolerance is ±0.005 [0.13] unless otherwise noted.  
©1999 Bel Fuse Inc. Specifications subject to change without notice. 06.99  
CORPORATE  
FAR EAST  
Bel Fuse Ltd.  
EUROPE  
Bel Fuse Inc.  
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  
T509