NAME:

SHEET:

DATE:

RHOMBUS P/N:

CUST P/N:

15801 Chemical Lane, Huntington Beach, CA 92649

Phone: (714) 898-0960

FAX: (714) 896-0971

Rhombus

Transformers & Magnetic Products

Industries Inc.

1 of 1

06/19/98

F-134

COMMON MODE CHOKE

The application of the Common Mode Choke is EMI suppression in ISDN U-interface.

withstands power induction as specified in Figure 4 and Figure A.4 of ITU-T K.20.

The CMC is tested with pin 1 of the CMC as point A in the figures, and pin 5 as point B.

Pins 6 and 10 of the CMC are connected to the earth.

Withstands power contact as specified in Figures 5 of ITU-T K.20. The CMC is tested with

pin 1 of the CMC as point A in the figure, and pin 5 as point B. Pins 6 and 10 of the CMC

are connected to the earth.

Withstands surges as specified in The Bellcore TR-NWT001089 standard (items 6 and 10

of the table 4-2):

1 kV peak voltage, 100 A minimum peak current, 10/100

µsec waveform, 25 times for

each polarity, test connection A.

2.5 kV peak voltage, 500 A minimum peak current, 2/10

µsec waveform, 10 times for

each polarity, test connection B.

The CMC is tested with pin 1 of the CMC as Tip in the figure, and pin 5 as Ring. Pins 6

and 10 of the CMC are connected to the earth.

Passes 80 kbaud 2B1Q signals (differential) specified in ITU-T G.961.

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Schematic Diagram

1

4

5

6

Parameter

Min.

Typ.

Max.

Units

Inductance

(1-10)

5.5

mH

Leakage Inductance

1.0

mH

DC Resistance

(1-10) or (5-6)

0.8

W

Hi-Pot

(1-10) to (5-6)

500

VDC

Current

100

mA

Frequency Range

100

50000

kHz

Suggested Solder Pad Layout

.148

(3.75)

TYP.

.039

(1.00)

TYP.

.385

(9.77)

.854

(21.7)

MAX.

.1.09

(27.7)

.81

(20.6)

.827

(21.0)

.012

(0.30)

TYP.

.07

(1.80)

.148

(3.75)

.787

(20.0)

.079

(2.0)

.11

(2.8)

10

9

8

7

6

12

3

4

5

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