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