Corporate Office

Bel Fuse Inc.

198 Van Vorst Street, Jersey City, NJ 07302-4496

Tel: 201-432-0463

Fax: 201-432-9542

E-Mail: BelFuse@belfuse.com

Internet: http://www.belfuse.com

Far East Office

Bel Fuse Ltd.

8F/8 Luk Hop Street

San Po Kong

Kowloon, Hong Kong

Tel: 852-2328-5515

Fax: 852-2352-3706

European Office

Bel Fuse Europe Ltd.

Preston Technology Management Centre

Marsh Lane, Preston PR1 8UD

Lancashire, U.K.

Tel: 44-1772-556601

Fax: 44-1772-888366

defining a degree of excellence

Secondary

2

Primary

10

6

4

SCHEMATIC

0.063(1.60)

0.100(2.54)

0.050(1.3)

0.705(17.91)

SUGGESTED

PC

BOARD

LAYOUT

0.420

(10.67)

Max

0.669(17.0)

+/- 0.006(0.15)

10

6

S574-1000-06

0.550

(13.97)

Max

Pin 2

4

0.520(13.21)

Max

bel

MECHANICALS

S574-1000-06

Part

Number

Turns

Ratio

(+/- 2%)

1 : 1

1.50

Insertion

Loss (dB)

+/- 0.25dB

600

Pins

(6-10)

Return Loss

(dB) Min

DCR

(

Ω) +/- 10%

Pins

(2-4)

25

60

40

Longitudinal

Balance (dB) Min

200Hz to

1000Hz

1000Hz to

4000Hz

Insertion loss measured at 1kHz.

Reflected impedance, distortion, Longitudinal balance measured

with 442 ohms across the secondary.

Harmonic Distortion. The -82dB max is measured at 600Hz, -10dBm (V.34) ref.

Part

Number

300Hz to 3500Hz

Frequency

Response (dB)

+/- 0.25

S574-1000-06

-82

Reflected

Impedance

(ohms)

+/-5%

82.5

87.5

600Hz

Harmonic

Distortion

(dB) Max

300Hz to

4000Hz

Bel proudly introduces a new modem

transformer for data/fax modem applications

including V.34bis 28,800 bps applications.

Tape and Reel packaging available.

* 1250 Vrms isolation Voltage.

* Meets or exceeds requirements of:

CAN/CSA-C22.2 (1988) No. 225(M90),

and DOC's C3-03 (Issue 7): UL's

UL1950; 2nd edition; and FCC's

Part 68(58 FR 44907, Aug 25, 1993).

* Weight is 5.0 grams

TM0043

MODEM TRANSFORMER

S574-1000-06

Dimensions are in inches (mm).

Dimension tolerance +/- 0.01(0.25) unless otherwise stated.

T403