ISDN S-Bus TEW4923 is designed/approved for use as an input/output transformer in the ISDN S-Interface. Features • • TEW4923 Input/Output Transformer Certified to the safety requirements of : EN41003 and EN60959. BABT CR/T/0053. Fully encapsulated in epoxy for mechanical protection and to insure the dielectric strength requirements. TEW4923 “ ” “ ” “ AMD National Siemens Siemens Siemens Siemens 79C30A TP3420 PEB2080 PEB2081 PEB2085 PEB2086 TEW4923 - 1 Intel 29C53 TEW4923 - 2 “ ” Mitel Mitel Mitel MT8930A MT8930B MT8931B TEW4923 - 3 Motorola MC145474 Motorola MC145475 TEW4923 - 4 Motorola MC145574 MECHANICAL 6 1 6 5 2 5 4 3 4 TEW4923, -1 and -3 1 3 TEW4923-2 3 MT8930A/B 4 5 6 1 1 WHITE DOT AT PIN 1 6 5 4 3 ISSUE: G 96/02/29 TEW4923 Connection of TEW4923-2 ELECTRICAL Turns ratio TEW4923 TEW4923-1 TEW4923-2 TEW4923-3 TEW4923-4 (1 - 3) : (6 - 4) 2 :1 1.8 : 1 2 :1 1:1 2.5 : 1 DCR (Ohms) (1 - 3) (6 - 4) 5.4 2.7 6.7 3.2 8.4 3.7 3.7 3.2 12.8 3.2 Inductance (mH) (6 - 4) > 22 > 22 > 22 > 22 > 22 Leakage Ind. (µH) (6 - 4) < 6.0 < 6.0 < 12 < 6.0 < 12 L..C.L. (dB) 10 - 300 KHz > 54 > 54 > 54 > 54 > 54 Output/Input Impedance Conforms to the impedance mask given in CCITT I.430. Pulse Shape Dielectric Strength Filtran Limited Conforms to the pulse mask given in CCITT I.430 with 50 and 400 ohms terminations. (Volts rms) 4000 4000 4000 229 Colonnade Road, Nepean, Ontario, Canada, K2E 7K3, Tel: (613) 226-1626, Fax: (613) 226-7124 4000 4000 3-8