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| ISDN U-BUS Input/Output Transformer TEW4897 TEW4897 is designed to interface with the subscribers premises (NT) and the 2- wire line side of the Central Office Equipment (LT) in the ISDN Network. TEW4897 meets the electrical requirements for the SIEMENS PEB20902/IEC (4B3T) device. Exceeds the requirements of: EN60950 and EN41003. Applications: * * * Low profile construction. Up to 50 mA line current. High insulation between line and equipment side. MECHANICAL 1 6 DEVICE 2 LINE 7 3 4 DOT AT PIN #1 DIMENSIONS, Inches (mm) P/N TEW4897 L W H A B C S 0.025 (0.64) 0.87 0.83 0.63 0.60 0.20 0.12 (22.0) (21.0) (16.0)(15.3) (5.1) (3.0) TEW4897.chp ELECTRICAL Line Impedance Inductance Leakage Inductance Distributed Capacitance Winding Resistance Turns Ratio Longitudinal Balance DC Capability (Line Side) Dielectric Strength 150 > 3.7 mH < 12.5 H < 110 pF < 2.5 < 1.74 1 : 1.32 > 60 dB > 55 dB 50 mA 4000 V rms 97/08/25 (6-7) (6-7) (1-4) (1-4) (6-7) (6-7) : (1-4) 1 - 4 KHz 4 - 160 KHz Issue; D Filtran Limited 229 Colonnade Road, Nepean, Ontario, Canada. K2E 7K3 Tel : (613) 226-1626 Fax : (613) 226-7124 4-12 |
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