Document 231 xDSL Interface Transformers For LT1794, LT1795 and LT1886 This product is not RoHS-compliant. Contact Coilcraft for current status or possible alternatives. These transformers provide coupling and line isolation for xDSL interfaces using the Linear Technology LT1794, LT1795 and LT1886 amplifiers. They feature very low leakage inductance, stable primary inductance from -40°C to +85°C and longitudinal balance optimized for the best overall performance at ADSL and HDSL2 transmission speeds. In addition to the standard models shown, Coilcraft can provide custom transformers with other turn ratios. For free evaluation samples or to discuss custom designs, contact Coilcraft or visit www.coilcraft.com. Tape and reel 175 per 13″ reel Plastic tape: 32 mm wide, 0.5 mm thick, 28 mm pocket spacing, 12.93 mm pocket depth Part number Style Chip set X8390-A SMT LT1794, LT1886 X8502-A SMT LT1794, LT1886 X8505-ASMT LT1886 X8504-ASMT LT1795 Line side inductance (mH) 0.368 ±5% 0.368 ±5% 0.368 ±5% 0.368 ±5% Dielectric Longitudinal Part strength Turns ratio1 balance number (V) line : chip (dB) min X8390-A1500 1 : 1 45 (20 kHz - 1.1 MHz) X8502-A1500 1 : 1.2 42 (20 kHz - 1.1 MHz) X8505-A1500 1 : 1.5 42 (20 kHz - 1.1 MHz) X8504-A1500 1 : 1.4 42 (20 kHz - 1.1 MHz) Leakage DCR max (Ohms) inductance (µH) max Chip side Line side 11 0.841 (6-9, 7-10) 1.95 (4-2) 11 0.895 (6-9, 7-10) 1.70 (4-2) 11 0.750 (6-9, 7-10) 1.85 (4-2) 11 0.875 (6-9, 7-10) 1.75 (4-2) Designed to meet UL 1459, 1950 UL 1459, 1950 UL 1459, 1950 UL 1459, 1950 Dot above pin1 1.Turns ratio is with the chip side windings connected in series. 2.All electrical specifications referenced to line side. 3.Operating temperature range -40°C to +85°C. 4.Electrical specifications at 25°C. Line side C Chip side 6 1 B Recommended Land Pattern F 4 6 1 10 A 9 2 5 7 G E 10 Chip side windings to be connected in series on the PC board A max B max C max E F typ G typ 0.5300.6990.5000.5900.0980.061 × 0.050 13,46 17,75 12,70 14,99 2,50 1,55 × 1,27 US +1-847-639-6400 [email protected] UK +44-1236-730595 [email protected] Taiwan +886-2-2264 3646 [email protected] China +86-21-6218 8074 [email protected] Singapore + 65-6484 8412 [email protected] Document 231 Revised 01/16/08 © Coilcraft Inc. 2012 This product may not be used in medical or high risk applications without prior Coilcraft approval. Specification subject to change without notice. Please check out web site for latest information.