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.
)
Schematic Diagram
1
5
Parameter
Inductance
Leakage Inductance
(1-10)
Min.
Typ.
5.5
1.0
0.8
Max.
Units
mH
mH
W
VDC
4
6
DC Resistance
Hi-Pot
10
9
8
7
6
(1-10) or (5-6)
500
(1-10) to (5-6)
Current
Frequency Range
100
100
50000
mA
kHz
.148
(3.75)
1
2
3
4
5
.079
(2.0)
.11
(2.8)
.148
(3.75)
TYP.
.039
(1.00)
TYP.
.854
(21.7)
MAX.
.012
(0.30)
TYP.
.81
(20.6)
.1.09
(27.7)
.787
(20.0)
.385
(9.77)
.827
(21.0)
.07
(1.80)
Suggested Solder Pad Layout
RHOMBUS P/N:
CUST P/N:
DATE:
06/19/98
F-134
NAME:
SHEET:
1 of 1
Rhombus
Industries Inc.
Transformers & Magnetic Products
15801 Chemical Lane, Huntington Beach, CA 92649
Phone: (714) 898-0960
FAX: (714) 896-0971
www.rhombus-ind.com
RHOMBUS-IND [ Rhombus Industries Inc. ]
