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

TM02129

page 1

DS3/E3/STS-1 Dual Transformers

SCHEMATICS

ELECTRICAL SPECIFICATIONS at 25° C

S554-6500-15

•

Optimized for line transceivers operating at E3, DS3

or STS-1 rates: 34.368 Mb/s, 44.736 Mb/s, 51.84 Mb/s

•

Transmit transformer and receive transformer in one

surface mount package

•

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

from 860 kHz to 51.55 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 75

Ω for 1 : 1 ratios and 300 Ω for 1 : 2 ratios

r

e

b

m

u

N

t

r

a

P

o

i

t

a

R

s

n

r

u

T

%

2

±

e

c

n

a

t

c

u

d

n

I

y

r

a

m

i

r

P

z

H

k

0

0

1

t

a

e

g

a

k

a

e

L

e

c

n

a

t

c

u

d

n

I

z

H

M

1

t

a

e

c

n

a

t

i

c

a

p

a

C

w

/

w

C

z

H

M

2

7

.

1

t

a

s

s

o

L

n

r

u

t

e

R

5

7

Ω

Ω

Ω

Ω

Ω

n

o

i

t

a

c

i

l

p

p

A

1

c

e

S

:

i

r

P

C

°

5

2

n

i

m

H

µ

C

°

0

4

-

n

i

m

H

µ

x

a

m

H

µ

x

a

m

F

p

C

°

5

2

p

y

t

B

d

C

°

5

8

+

o

t

0

4

-

n

i

m

B

d

A

l

i

o

C

B

l

i

o

C

A

l

i

o

C

B

l

i

o

C

A

l

i

o

C

B

l

i

o

C

A

l

i

o

C

B

l

i

o

C

B

&

A

l

i

o

C

A

l

i

o

C

B

l

i

o

C

A

l

i

o

C

B

l

i

o

C

5

1

-

0

0

5

6

-

4

5

5

S1

:

11

:

10

80

80

40

49

0

.

09

0

.

00

15

25

28

18

1

6

1

-

0

0

5

6

-

4

5

5

S1

:

1T

C

1

:

T

C

10

80

80

40

49

0

.

00

1

.

00

15

25

28

18

1

7

1

-

0

0

5

6

-

4

5

5

ST

C

2

:

11

:

10

80

80

40

49

0

.

09

0

.

00

15

25

28

18

1

8

1

-

0

0

5

6

-

4

5

5

S1

:

1T

C

2

:

10

80

80

40

49

0

.

09

0

.

00

15

25

28

18

1

S554-6500-16

Secondary

Primary

Coil A

Coil B

1 : 1

1 : 1

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

Coil A

Coil B

1 : 1

1CT : 1CT

Secondary

Primary

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16