ISDN TEW4962 U-BUS Input/Output Transformer TEW4962 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. TEW4962 & -1 meet the electrical requirements for the National TP3410 device. Applications: • Low profile construction. • Up to 50 mA line current. • TEW4962-1 exceeds the requirements on EN60950 and EN41003. MECHANICAL 1 6 2 7 3 DEVICE LINE 4 DOT AT PIN #1 DIMENSIONS, Inches (mm) P/N Issue; C 94/12/14 TEW4962.chp TEW4962 ELECTRICAL Line Impedance Inductance Leakage Inductance Winding Resistance Turns Ratio Longitudinal Balance DC Capability (Line Side) Dielectric Strength) Filtran Limited (1-4) (6-7) (1-2) & (3-4) (6-7) (6-7) : (1-4) 1 - 4 KHz 4 - 160 KHz (1-4) L W H A B C S 0.87 0.83 0.63 0.60 0.20 0.12 0.025 (22.0) (21.0) (16.0)(15.3) (5.1) (3.0) (0.64) TEW4962 TEW4962-1 135 Ω > 25 mH < 20 µH 3.4 Ω 3.3 Ω 1 : 1.5 > 60 dB > 55 dB 50 mA 1500 V rms 135 Ω > 25 mH < 20 µH 3.7 Ω 3.3 Ω 1 : 1.5 > 60 dB > 55 dB 50 mA 4000 V rms 229 Colonnade Road, Nepean, Ontario, Canada. K2E 7K3 Tel : (613) 226-1626 Fax : (613) 226-7124 4-14