Bel Fuse Inc. 198 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com

MODEM MAGNETICS

©2000 Bel Fuse Inc. Specifications subject to change without notice. 05.00

TM00405

T4-11

V.90 Modem Transformer

•

Provides isolation and balance while minimizing

signal distortion and insertion loss in high-speed

modem applications

•

Designed to match a 600

Ω line to a 374Ω load

with no direct current in the windings

•

Approved by UL and CSA

•

Minimum interwinding breakdown voltage of 1000 Vrms

•

Qualified per Bellcore TR-TSY-000357-1

SCHEMATIC

ELECTRICAL SPECIFICATIONS at 25° C

TYPICAL SPICE TRANMISSION MODEL

107

2.8mH

114

6

4

20 pF

18H

20 pF

3

1

60 k

1

3

6

4

Primary

Secondary

t

r

a

P

r

e

b

m

u

N

o

i

t

a

R

s

n

r

u

T

%

2

±

n

o

i

t

r

e

s

n

I

s

s

o

L

B

d

s

s

o

L

n

r

u

t

e

R

B

d

y

c

n

e

u

q

e

r

F

e

s

n

o

p

s

e

R

B

d

R

C

D

Ω

Ω

Ω

Ω

Ω

x

a

m

c

i

n

o

m

r

a

H

n

o

i

t

r

o

t

s

i

D

B

d

l

a

n

i

d

u

t

i

g

n

o

L

e

c

n

a

l

a

B

B

d

z

H

k

1

@

z

H

0

0

5

3

-

z

H

0

0

3

z

H

k

4

-

z

H

0

0

2

i

r

P

c

e

S

,

m

B

d

0

1

-

z

H

0

0

6

z

H

0

0

5

3

-

z

H

0

0

3

C

1

9

7

21

:

1<

0

.

2> 5

2<

1

.

08

1

15

2

1<

4

8

-> 0

6

2791C