64 Kbit/s data TEW4974 In/Output Transformer SCOPE Features: TEW4974 and TEW4974-1 are designed to operate in the 64 kbit mode of the CCITT recommendation G703 for Hierarchical Digital Interfaces. Applications: Codirectional Interface Contradirectional Interface • TEW4974 is specifically designed to meet the stringent BS6301 requirements for reinforced barrier insulation. • TEW4974 is fully encapsulated in epoxy to ensure 4000V dielectric strength. • TEW4974-1 has an electrostatic shield for improved noise rejection. MECHANICAL 6 1 Line Side 2 4 Device 3 1:2 TEW4974 WHITE DOT AT PIN 1 6 1 Line Side 2 All dimensions are in inches 4 Device 3 1:2 5 TEW4974-1 ELECTRICAL SPECIFICATIONS ISSUE: E 95/03/01 TEW4974 Line Impedance Turns Ratio (6 - 4):(1 - 3) TEW4974 TEW4974-1 120 Ω 120 Ω 1:2 1:2 5.2 Ω nom. 3.1 Ω nom. 8.9 Ω nom. 2.8 Ω nom Winding Resistance (1 - 3) (6 - 4) Inductance @ 0.5V 3000 Hz (6 - 4) > 16 mH > 24 mH Leakage Inductance (6 - 4) < 50 µH < 20 µH Return Loss @ 0.5 V Application CCITT G.703 Codirectional para. 1.2.1.3 Co- & Contradirectional para. 1.2.1.3 & 1.2.3.1.6 Temperature Operating Storage 0 to +50o C - 40 to +70o C 0 to +50o C - 40 to +70o C 4000 Vrms 1500 Vrms Dielectric Strength Filtran Limited 229 Colonnade Road, Nepean, Ontario, Canada. K2E 7K3, Tel : (613) 226-1626 Fax : (613) 226-7124 5-4