T-1253 xDSL TRANSFORMER PARAMETER UNITS Turns Ratio Designed to meet UL1950 and EN60950 reinforced insulation 1 : 1 +1% Inductance (Line Side) 1 1.25 +5% mH Leakage Inductance 1 12.0 Max µH Designed for DSL applications Longitudinal Balance 40 kHz to 300 kHz 50 min. dB Primary DCR 0.42 +10% Ω Custom versions of this transformer are available. Secondary DCR 10&7, 6&9 0.42 +10% Ω Frequency Response 33kHz - 110kHz +0.1 dB 0.5 Max. dB 1&4, 2&5 Insertion Loss @ 40kHz Isolation (HI-POT) 1500 A Surface Mount version of this transformer is available VRMS SCHEMATIC DIAGRAM: 1 Tested at 100 kHz - 0.25VAC 1 10 4 Physical Dimensions in inches (mm) 7 PRI. SEC. 2 9 5 6 Line Side Pins 1-4 + 2-5 Device Side Pins 10-7 + 9-6 PIN POSITION GRID 0.100 (2.54) HOLES FOR BOBBIN PINS 10 9 8 7 6 White Dot Indicates Pin #1 1 2 3 4 5 4/5/99 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