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

©2005 Bel Fuse Inc.

Specifications subject to change without notice. 05.05

TM01108

page 1

T1/E1 Octal Transformer Modules

SCHEMATIC

ELECTRICAL SPECIFICATIONS at 25° C

S553-6500-E3

•

Optimized for PMC-Sierra PM4318, 75

Ω option

•

Eight transformers in one surface-mount package

•

Two modules:

S553-6500-E3 with eight transformers

S553-6500-E4 with eight transformers and IC-side

surge protection devices

•

Four transformers have center taps to facilitate Simplex

line powering

•

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

•

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

•

UL 1950 approved: S553-6500-E3 file number E150991

S553-6500-E4 pending

1. Terminated in 36

Ω for TX and 27 Ω for RX

S553-6500-E4

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X

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03

.

06

.

06

.

08

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08

.

05

30

27

28

13

2

1

2

3

40

39

38

1 : 1.58CT

1 : 1.58CT

1 : 1.58

1 : 1.58CT

1 : 1.58CT

1 : 1.58

1 : 1.58

1 : 1.58

16

17

18

19

20

6

7

10

11

12

13

14

15

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

37

36

35

34

33

32

23

22

21

29

26

25

24

27

28

1 TXO+

1 TXOCT

1 TXO-

1 RXI+

1 RXICT

1 RXI-

2 TXO+

2 TXO-

2 RXI+

2 RXI-

3 TXO+

3 TXO-

3 RXI+

3 RXI-

4 TXO+

4 TXOCT

4 TXO-

4 RXI+

4 RXICT

4 RXI-

4

5

8

9

3,4 3.3V

3,4 GND

1,2 GND

1,2 3.3V

IC Side

Line Side

S

U

R

G

E

P

R

O

T

E

C

T

I

O

N

D

E

V

I

C

E

S

1

2

3

40

39

38

1 : 1.58CT

1 : 1.58CT

1 : 1.58

1 : 1.58CT

1 : 1.58CT

1 : 1.58

1 : 1.58

1 : 1.58

16

17

18

19

20

4

5

6

7

8

9

10

11

12

13

14

15

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

37

36

35

34

33

32

23

22

21

29

26

25

24

27

28

1 TXO+

1 TXOCT

1 TXO-

1 RXI+

1 RXICT

1 RXI-

2 TXO+

2 TXO-

2 RXI+

2 RXI-

3 TXO+

3 TXO-

3 RXI+

3 RXI-

4 TXO+

4 TXOCT

4 TXO-

4 RXI+

4 RXICT

4 RXI-

IC Side

Line Side