HIGH FREQUENCY MAGNETICS
DS3/E3/STS-1 Dodecal Transformer Module
TM02134
•
•
•
•
Optimized for line transceivers operating at E3, DS3
or STS-1 rates: 34.368 Mb/s, 44.736 Mb/s, 51.84 Mb/s
•
•
•
Operating temperature range -40° to +85°C
Meets IEC 695, 2-2 flammability requirements
Twelve line interface transformers in a single surface
mount package
PWB Process Capability: standard printed wiring board
assembly techniques, total-immersion cleaning
Meets ITU-T G.703 return loss from -40° to +85° C
from 860 kHz to 51.55 MHz
•
•
Reliability testing: Shock, vibration, temperature cycling,
temperature - humidity - bias
UL 1950 approved: file number E150991
Interwinding breakdown voltage: 1500 Vrms min
ELECTRICAL SPECIFICATIONS at 25° C
Leakage
Inductance
at 1 MHz
Turns Ratio
±2%
Primary Inductance
at 100 kHz
Capacitance
C w/w
Return Loss at 1.72 MHz
75Ω Application1
Part Number
25° C
µH min
-40° C
µH min
25° C
dB typ
-40 to +85° C
dB min
IC : Line
µH max
pF max
TX
RX
TX
80
RX
TX
40
RX
TX
RX
TX & RX
TX
25
RX
TX
RX
S554-6500-27
1 : 1
1 : 1
80
40
0.10
0.10
10
25
18
18
1. Terminated in 75 Ω on IC side
IC Side
Line Side
1 : 1
1
48
SCHEMATIC
S554-6500-27
47
46
2
3
1 : 1
1 : 1
1 : 1
1 : 1
4
45
44
The module is symmetrical and
either side can be connected
to the IC or to the line.
5
6
7
43
42
41
40
8
9
All transformers will support
either TX or RX operation.
10
11
39
38
1 : 1
1 : 1
37
36
12
13
14
15
35
34
1 : 1
1 : 1
16
17
33
32
18
19
31
30
1 : 1
1 : 1
29
28
20
21
22
23
27
26
1 : 1
24
25
©2002 Bel Fuse Inc. Specifications subject to change without notice. 05.02
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
page 1