Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
HIGH FREQUENCY MAGNETICS
©2002 Bel Fuse Inc. Specifications subject to change without notice. 02.02
TM02129
page 1
DS3/E3/STS-1 Dual Transformers
SCHEMATICS
ELECTRICAL SPECIFICATIONS at 25° C
S554-6500-15
• Optimized for line transceivers operating at E3, DS3
or STS-1 rates: 34.368 Mb/s, 44.736 Mb/s, 51.84 Mb/s
• Transmit transformer and receive transformer in one
surface mount package
• Meets ITU-T G.703 return loss from -40° to +85° C
from 860 kHz to 51.55 MHz
• UL 1950 approved: file number E150991
• Operating temperature range -40° to +85°C
• Meets IEC 695, 2-2 flammability requirements
• PWB Process Capability: standard printed wiring board
assembly techniques, total-immersion cleaning
• Reliability testing: Shock, vibration, temperature cycling,
temperature - humidity - bias
• Interwinding breakdown voltage: 1500 Vrms min
1. Ter minated in 75 Ω for 1 : 1 ratios and 300 Ω for 1 : 2 ratios
rebmuNtraP
oitaRsnruT %2± ecnatcudnIyramirP zHk001ta
egakaeL ecnatcudnI zHM1ta
ecnaticapaC w/wC zHM27.1tassoLnruteR 57 ΩΩ
Ω
ΩΩ noitacilppA
1
ceS:irP C°52 nimHµ C°04- nimHµ xamHµ xamFp C°52 pytBd C°58+ot04- nimBd
AlioC BlioC AlioC BlioC AlioC BlioC AlioC BlioC B&AlioC AlioC BlioC AlioC BlioC
51-0056-455S1:11:10808040490.090.00152528181
61-0056-455S1:1TC1:TC10808040490.001.00152528181
71-0056-455STC2:11:10808040490.090.00152528181
81-0056-455S1:1TC2:10808040490.090.00152528181
S554-6500-16
Secondary
Primary
Coil A
Coil B
1 : 1
1 : 1
1
2
3
4
5
6
7
89
10
11
12
13
14
15
16
Coil A
Coil B
1 : 1
1CT : 1CT
Secondary
Primary
1
2
3
4
5
6
7
89
10
11
12
13
14
15
16
CORPORATE
Bel Fuse Inc.
206 Van V orst Street
Jersey City, NJ 07302
Tel 201-432-0463
Fax 201-432-9542
www.belfuse.com
FAR EAST
Bel Fuse Ltd.
8F / 8 Luk Hop Street
San Po Kong
K owloon, Hong K ong
Tel 852-2328-5515
Fax 852-2352-3706
www.belfuse.com
EUROPE
Bel Fuse Eur ope Ltd.
Preston Technology Management Centre
Marsh Lane, Suite G7, Preston
Lancashire, PR1 8UD, U .K.
Tel 44-1772-556601
Fax 44-1772-888366
www.belfuse.com
HIGH FREQUENCY MAGNETICS
©2002 Bel Fuse Inc. Specifications subject to change without notice. 02.02
TM02129
page 2
DS3/E3/STS-1 Dual Transformers
0.485
[12.32]
max
0.375
[9.53]
max
0.285
[7.24]
max
0.018 ±0.002
[0.46 ±0.05]
0.225
[5.72]
max
0.050
[1.27]
0.003
[0.08]
min
0.350 ±0.010
[8.89 ±0.25] 0.008 - 0.012
[0.20 - 0.30] 0.035
[0.89]6˚ nom
0.025
[0.64] 0.070
[1.78]
0.050
[1.27]
0.425
[10.80]
Suggested PCB Pad Layout
Dimensions are in inches [millimeters].
Standard dimension tolerance is ±0.005 [0.13] unless otherwise noted.
0.004 [0.10]
MECHANICAL
S554-6500-15
S554-6500-16
S554-6500-17
S554-6500-18
Tape and Reel Packaging
24 mm wide by 12 mm pitch; 13 inch OD, 4 inch ID
750 modules per reel, maximum
Meets ANSI/EIA 481-2 Carrier Tape Standards - JEDEC SO Package
S554-6500-17 S554-6500-18
Secondary Primary
Coil A
Coil B
2CT : 1
1 : 1
1
2
3
4
5
6
7
89
10
11
12
13
14
15
16
Coil A
Coil B
1 : 1
1 : 2CT
Secondary
Primary
1
2
3
4
5
6
7
89
10
11
12
13
14
15
16
SCHEMATICS
