HIGH FREQUENCY MAGNETICS
T1/E1 Octal Transformer Modules
TM01122
•
Optimized for all Dallas 3.3V devices and Intel LXT380,
LXT381 devices
•
•
•
Operating temperature range -40° to +85°C
Meets IEC 695, 2-2 flammability requirements
•
•
Eight transformers in one surface mount package
PWB Process Capability: standard printed wiring board
assembly techniques, total-immersion cleaning
Two modules:
S553-6500-B8 with transformers and IC-side surge
protection devices
S553-6500-B9 with transformers only
•
Reliability testing: Shock, vibration, temperature cycling,
temperature - humidity - bias
•
Meets ITU-T G.703 return loss from -40° to +85° C
•
•
Interwinding breakdown voltage: 1500 Vrms min
UL 1950 approved: file number E150991
ELECTRICAL SPECIFICATIONS at 25° C
Primary
Inductance
at 10 kHz
Leakage
Inductance
at 1 MHz
Return Loss at 102 kHz
120Ω Application1
DCR
Ω
max
Turns Ratio
±2%
Interwinding
Capacitance
pF max
Part Number
25° C
dB typ
-40 to +85° C
dB min
mH min
µH max
TXI : TXO RXI : RXO
TXI
RXI
TXI
RXO
TXI
TXO
RXI
RXO
TX
RX
TX
RX
S553-6500-B8
S553-6500-B9
1 : 2
1 : 2
1 : 1
1 : 1
1.5
1.5
1.8
0.3
0.5
0.6
1.2
0.6
0.6
35
35
19
19
30
18
19
1.8
0.3
0.5
0.6
1.2
0.6
0.6
30
18
19
1. Terminated in 23.2 Ω for TX and 120 Ω for RX
SCHEMATIC
S553-6500-B8
S553-6500-B9
Line Side
IC Side
1
Line Side
IC Side
1 : 2
1 : 2
1 TXO+
1 TXI+
40
1 TXO+
40
39
1
2
1 TXI+
2
39
1,2 3.3V
1 TXI-
S
U
R
G
E
1 TXI-
3
4
38 1 TXO-
38 1 TXO-
3
4
1 : 1
1 : 2
1 : 1
1 : 2
1 RXO+
1 RXI+
37
1 RXI+
1 RXO+
37
1 RXI-
36
35
34
1 RXI-
5
6
36
35
34
1 RXO-
2 TXI+
5
6
1 RXO-
2 TXI+
2 TXO+
2 TXO+
P
R
O
T
E
C
T
I
7
7
1,2 GND
8
9
33 2 TXO-
33 2 TXO-
2 TXI-
8
9
2 TXI-
1 : 1
1 : 2
1 : 1
1 : 2
2 RXO+
2 RXI+
32
2 RXI+
32
2 RXO+
2 RXI-
2 RXI-
2 RXO- 10
31
30
31
30
2 RXO- 10
3 TXO+
3 TXO+
3 TXI+
11
12
3 TXI+
11
12
29
28
29
28
3,4 3.3V
O
N
3 TXO-
13
14
3 TXO-
3 TXI-
13
14
3 TXI-
1 : 1
1 : 2
1 : 1
1 : 2
3 RXO+
3 RXO+
27 3 RXI+
27 3 RXI+
D
E
V
I
C
E
S
3 RXO-
4 TXI+
3 RXO-
4 TXI+
15
16
15
16
26 3 RXI-
26 3 RXI-
25 4 TXO+
25 4 TXO+
24
17
17
3,4 GND
24
23 4 TXO-
4 TXI-
18
19
18
19
23 4 TXO-
4 TXI-
1 : 1
1 : 1
4 RXI+
22
4 RXI+
22
4 RXO+
4 RXO+
4 RXI-
21
4 RXO- 20
4 RXO- 20
©2005 Bel Fuse Inc. Specifications subject to change without notice. 05.05
4 RXI-
21
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
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