T1/E1/CEPT /ISDN-PRI TRANSFORMER P/N: 4S1181 DATA SHEET A. General Specifications 1. Eight transformers in a surface mount package supports four transmit and four receive channels 2. Cross talk : -65dB or better 3. Models matched to leading quad and dual T1/E1/CEPT/ISDN-PRI transceivers . 4. Operating temperature range: 0℃ to +70℃ B. Electrical Specifications @25℃ ℃ 1. Turns Ratio(± 2%) : PRI:SEC =1:2.1CT 2. TX/RX OCL.: 1.2 mH Min /0.6 mH Min 3. TX/RX. Cw/w: 35 pF Max/35 pF Max 4. TX/RX L/L: 0.6 µH Max/0.6 µH Max 5. TX. Primary PINS: 1-2, 6-7, 11-12, 16-17 6. RX. Primary PINS : 21-22, 26-27, 31-32, 36-37 7. Isolation HI-POT:1500 Vrms C. Schematic & Mechanical: ﹐ Prepared :Luo Ming Li Approved: Xu Wenbing Date : 2001/07/11 Drawing no.: ISDN Transformer REV.: A0 Page : 1/1