ISDN T1/E1 TRANSFORMER P/N: S4937A DATA SHEET A. General Specifications: 1. Used the widely -accepted âTâ case packaging 2. Models available for use with most E1/T1 transformer chips Electrical Specifications@ 25C 1. Turns Ratio: 1:1.36 2. OCL : 1.5 mH Min 3. L.L : 0.80 µH Max 4. Cw/w : 35 pF Max 5. DCR Pri. : 0.70 ? Max 6. DCR Sec. : 1.0 ? Max 7. Primary Pins : 5-6 8. HI-POT : 1500 Vrms C. Schematic & Mechanical: Prepared :Qingli Wu Approved: Xu Wenbing Drawing no.: ISDN Transformer REV.: A3 Date :2001/07/16 Page : 1/1