ISDN U-INTERFACE TRANSFORMER Turns Ratio (5-1) : (9-7) (connect 6-10) PARAMETER 1 : 1.5 MIN. MAX. UNITS 77.0 86.0 mH Leakage Inductance 9-7 connect 6 + 10and 5 + 1 100 172 µH DC Resistance (5-1) 5.2 5.6 ohms DC Resistance (9-7) (connect 6-10) 12.35 13.55 ohms Isolation (Hi-Pot) (Pri to Sec) 1500 VRMS 70 dB Primary Inductance 1 Flammability: Materials used in the production of these units meet requirements of UL94-VO and IEC 695-2-2 needle flame test. Pins 9 to 7 with 6 & 10 shorted. Longitudinal Balance (40 KHz) A Surface Mount Version of this part is available add suffix "G" to part number Use with Lucent Technologies chip sets T7256, T7234, T7237, and T7264. 1.. 1.0 kHz , 0.1 Vac, 30 mA dc. 1.070 (27.18) REF. .470 (11.94) MAX. .100 (2.54) MIN. .900 (22.86) REF. 10 .040 (1.02) TYP. .920 (23.37) MAX. .150 (3.81) TYP. Terminal Dimensions .020 (.051) X .040 (1.02) Typical. Bottom View 1 9 2 8 3 7 4 6 5 Physical Dimensions inches (mm) .800 (20.32) Termination Numbers for Reference Only. Schematic Diagram Pri Notch Indicates Pin # 1 Sec 5 9 6 10 RHOMBUS P/N: T-1238 7 CUST P/N: DATE: 4/28/99 1 Rhombus Industries Inc. Transformers & Magnetic Products NAME: SHEET: 1 of 1 15801 Chemical Lane, Huntington Beach, CA 92649 Phone: (714) 898-0960 FAX: (714) 896-0971 www.rhombus-ind.com