T1/CEPT(E1)/ISDN-PRI TRANSFORMER P/N: 4S1142M 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. IC grade transfer-molded package with stand 235℃IR reflow . 5. Operating temperature range: -40℃ to +85℃ 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. :1.5 mH Min /1.5 mH Min 4. TX/RX. Cw/w: 35 pF Max/35 pF Max 5. TX/RX L/L: 0.6 µH Max/0.6 µH Max 6. DCR : 0.8 Ω Max 7. Transmit : 1-2, 8-9, 11-12, 18-19, 40-39, 33-32, 30-29, 23-22 8. Receive : 3-4, 6-7, 13-14, 16-17, 38-37, 35-34, 28-27, 25-24 C. Schematic & Mechanical: × × × × × ﹐ Prepared :Qingli Wu Approved: Xu Wenbing Date : 2001/01/28 Drawing no.: ISDN Transformer REV.: A1 Page : 1/1