PARAMETER T-982 UNITS Turns Ratio 2 : 1 +1% Line Impedance 135 Ω Inductance (Line Side) 3.0 +6% mH Longitudinal Balance 40 kHz to 200 kHz 53 min. dB Primary DC Resistance 2.5 Max. Ω Secondary DC Resistance 1.0 Max. Ω Frequency Response 40kHz - 300kHz +0.2 dB Insertion Loss @ 200kHz 0.4 dB Isolation (HI-POT) 2000 VRMS Primary DC 160 mA Return Loss @ 40kHz 20 min. dB THD (40 KHz, 14 dBm) -70 Min. dB HDSL TRANSFORMER Designed for HDSL applications Compatible with Brooktree BT8921 & BT8970 at 784 kbps Custom versions of this transformer are available. A Surface Mount version of this transformer is available Coils finished with UL rated varnish. Designed to meet the supplementary insulation requirements of UL1950 for a working voltage of 250V SCHEMATIC 1 9 4 Physical Dimensions in inches (mm) 2 7 5 Line Side Pins 1-4 + 2-5 Device Side Pins 9-7 PIN POSITION GRID 0.100 (2.54) HOLES FOR BOBBIN PINS 10 9 8 7 6 1 2 3 4 5 Rhombus Industries Inc. Transformers & Magnetic Products 6/02/00 15801 Chemical Lane, Huntington Beach, CA 92649 Phone: (714) 898-0960 FAX: (714) 896-0971 www.rhombus-ind.com