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Document 255 ADSL Interface Transformers For Virata Beryllium chipset These transformers provide coupling and line isolation for ADSL interfaces using the Virata Beryllium chip set. They feature very low leakage inductance, stable primary inductance from -40C to +85C and longitudinal balance optimized for the best overall performance at ADSL transmission speeds. In addition to the standard model shown, Coilcraft can provide custom transformers with other turns ratios. For free evaluation samples or to discuss custom designs, contact Coilcraft or visit www.coilcraft.com. Part number X8388-C Style SMT Dielectric strength (V) 2300 Chip set Virata Beryllium Line side inductance (mH) Leakage inductance max (H) 6 DCR max (Ohms) Chip side Line side 1.27 (7-6), 1.19 (9-8) 1.16 (2-3, 4-5) 600 5% Part number X8388-C Turns ratio line : chip 1 : 1.21 Longitudinal balance min (dB) 45 (20 kHz - 600 kHz) Designed to meet UL 1950 1. All electrical specifications referenced to line side. 2. Operating temperature range -40C to +85C. 3. Electrical specifications at 25C. E F A C 3 4 8 7 Line side 2 Chip side 9 Dot above pin1 6 5 10 1 B Recommended Land Pattern G 5 6 A max B max 0.530 13,46 0.699 17,75 C max 0.500 12,70 E 0.590 14,99 F typ 0.098 2,50 G typ 0.061 x 0.050 1,55 x 1,27 Tape and reel: 175/13 reel 32 mm tape width For packaging data see Tape and Reel Specifications section. Specifications subject to change without notice. Document 255 Revised 11/02/04 |
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