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

©2001 Bel Fuse Inc. Specifications subject to change without notice. 09.01

TM01112

page 1

T1/E1 Miniature Octal Transformer Module

SCHEMATIC

ELECTRICAL SPECIFICATIONS at 25° C

S553-6500-C6

•

Optimized for PMC Sierra PM4354 Quad COMET

•

Eight transformers in one surface-mount package

•

Miniature octal 32-pin platform provides 33% area

reduction compared to standard octal package

•

Electrically identical to S553-6500-A7

•

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

•

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 25.4

Ω for TX and 18.2 Ω for RX

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1 : 2.42

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1 TXI+

1 TXI-

1 RXO+

1 RXO-

2 TXI+

2 TXI-

2 RXO+

2 RXO-

3 TXI+

3 TXI-

3 RXO+

3 RXO-

4 TXI+

4 TXI-

4 RXO+

4 RXO-

31

30

32

21

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-

IC Side

Line Side

1 : 2.42

4

6

7

10

11

22

23

24

2

3

9

17

18

19

20

25

1 : 2.42

1 : 2.42

1 : 2.42

1 : 2.42

1 : 2.42

1 : 2.42