T1/CEPT/E1/ISDN-PRI TRANSFORMER P/N: 4S1142 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/CEPTISDN-PRI transceivers . 4. Operating temperature range: 0℃ to +70℃ B. Electrical Specifications @25℃ ℃ 1. Isolation HI-POT:1500 Vrms 2. Turns Ratio(± 2%) : TX=1:2.4, RX=1:1 3. TX/RX OCL.: 1.0 mH Min /1.0 mH Min 4. TX/RX. Cw/w: 35 pF Max/35 pF Max 5. TX/RX L/L: 0.5 µH Max/0.5 µH Max 6. TX. Primary PINS: 1-2, 8-9, 11-12, 18-19 7. RX. Primary PINS : 25-24, 28-27, 35-34, 38-37 C. Schematic & Mechanical: ﹐ Prepared :Luo Ming Li Approved: Xu Wenbing Date : 2001/06/11 Drawing no.: ISDN Transformer REV.: A0 Page : 1/1