ISDN TEW5252 U-BUS Input/Output Transformer TEW5252-1 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. Applications: TEW5252-1 meets the electrical requirements for the AT&T T7262 device, and complies with the ANSI T1.601 specification. • High performance ANSI 2B1Q line code. • Low profile construction. • Up to 30 mA line current. • Exceeds the requirements of EN60950 and EN41003. Designed to meet the requirements BS6301 for reinforced insulation, clearance and creepaga distances. MECHANICAL 1 6 2 7 3 LINE DEVICE 4 DOT AT PIN #1 DIMENSIONS, Inches (mm) P/N TEW5252 TEW5252.chp ELECTRICAL SPECIFICATIONS 94/12/14 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) TEW5252-1 Devices 135 Ω Line Impedance Inductance Issue: B L (1-2)+(3-4) Leakage Inductance (short 2-3 & 1-4) (6-7) Winding Resistance (1-2) + (3-4) (6-7) Turns Ratio (6-7):(1-2 ):(3-4) DC Capability (Line Side) Dielectric Strength Filtran Limited (1 - 4) 80 - 120 mH < 35 µH 13.5 - 16.5 Ω 4 - 5.5 Ω 1 : 1.25 : 1.25 30 mA 4000 V rms 229 Colonnade Road, Nepean, Ontario, Canada. K2E 7K3 Tel : (613) 226-1626 Fax : (613) 226-7124 4-16