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

TM02128

page 1

T1/E1 Octal Transformer Module

SCHEMATIC

ELECTRICAL SPECIFICATIONS at 25° C

S553-6500-F2

•

Optimized for Intel LXT3108 eight channel device

•

Eight transformers in one surface mount package

•

Four transformers have center taps to facilitate line

driver circuitry

•

Meets ITU-T G.703 return loss from -40° to +85° C

from 51 kHz to 3.072 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. Terminated in 120

Ω on IC side

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19

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1CT : 1

1 : 1

20

7

10

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12

13

14

15

1 TXI+

1 TXICT

1 RXO+

1 RXO-

2 TXI+

2 TXI-

2 RXO+

2 RXO-

3 TXICT

3 TXI+

3 RXO+

3 RXO-

4 TXI+

4 TXI-

4 RXO+

4 RXO-

30

36

33

32

23

29

26

27

28

1 TXO+

1 TXO-

1 RXI+

1 RXI-

2 TXO+

2 TXO-

2 RXI-

2 RXI-

3 TXO+

3 TXO-

3 RXI+

3 RXI-

4 TXO+

4 TXO-

4 RXI+

4 RXI-

4

5

8

9

IC Side

Line Side

1 : 1

1 : 1

1 : 1

6

16

17

18

19

37

34

31

25

24

22

21

1CT : 1

1CT : 1

1CT : 1

3

2

1 TXI-

2 TXICT

3 TXI-

4 TXICT

39

38

35