ISDN TEW5714 U-BUS Input/Output Transformer TEW5714 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. TEW5714 meet the electrical requirements for the MOTOROLA MC145572 device. Applications: • Low profile construction. • Up to 50 mA line current. • TEW5714 meets the requirements of BS6301 for reinforced insulation, clearance and creepage distances between the line and the device side. MECHANICAL 1 DEVICE 6 2 7 3 LINE 4 DOT AT PIN #1 DIMENSIONS, Inches (mm) P/N Issue; A 94/12/14 5714.chp TEW5714 L W H A (22.0) (21.0) (16.0)(15.3) (5.1) (3.0) (0.64) Line Impedance 135 Ω 135 Ω > 28 mH < 20 µH 5.4 Ω nom. 5.7 Ω nom. 1 : 1.25 > 60 dB > 55 dB 50 mA 4000 V rms > 28 mH < 20 mH 5.4 Ω nom. 5.7 Ω nom. 1 : 1.25 > 60 dB > 55 dB 50 mA 4000V Turns Ratio Longitudinal Balance DC Capability (Line Side) Dielectric Strength Filtran Limited S 0.025 TEW5714 Pri. Sec. Pri.) Sec.) Sec. : Pri. 1 - 4 KHz 4 - 160 KHz Pri. C 0.87 0.83 0.63 0.60 0.20 0.12 ELECTRICAL Inductance Leakage Inductance Winding Resistance B 229 Colonnade Road, Nepean, Ontario, Canada. K2E 7K3 Tel : (613) 226-1626 Fax : (613) 226-7124 4-24