ISDN S-Interface Dual Transformer Compatible With AT&T T7256 Reinforced Insulation Per EN 41003/EN 60950 SCHEMATIC DIAGRAM Turns Ratio Pins 1-4:16-13 & 5-8:12-9 PARAMETER Open Circuit Inductance 1-4 (1) 5-8 (2) 1:2.5 & 1:2.5 MIN. MAX. 22 SE C UNITS mHy Leakage Inductance 1-4 (1) Short 16-13 5-8 (2) Short 12-9 4 4 µHy µHy Interwinding Capacitance (CW/W) 1-4 (1) & 16-13 (3) 5-8 (2) & 12-9 (4) 100 100 pF pF Distributed Parallel Capacitance 1-4 (1) 5-8 (2) 180 100 pF pF Primary DC Resistance: 1-4 (1) ; 5-8 (2) 2.30 ohms Secondary DC Resistance:16-13 ;12-9 5.80 ohms Isolation (HI-POT) PRI 4000 VRMS Flammability: Materials used in the production of these units are UL94-VO and meet requirements of IEC 695-2-2 needle flame test. MEETS THE PULSE WAVEFORM TEMPLATE OF CCITT I.430. OPrimary is Line Side OUnbalanced current at TE: ∆ Idc = 1 mAmax. OLongitudinal Conversion Loss - 10KHz to 300 KHz: 60dB min. Parts shipped in anti-static tubes. 18 pieces per tube Package Dimensions in Inches (mm) Oscillation Voltage = 500mV Oscillation Frequency = 10.0 KHz 1. Connect 2 & 3 2. Connect 6 & 7 Rhombus Industries Inc. Transformers & Magnetic Products RHOMBUS P/N: T-13556 CUST P/N: DATE: 3/24/94 www.rhombus-ind.com NAME: SHEET: 1 OF 1 15801 Chemical Lane, Huntington Beach, CA 92649-1595 Phone: (714) 898-0960 FAX: (714) 896-0971