U Interface Transformer (2B1Q Coding Applications) Designed for use with National TP 3410 Turns Ratio ( + 3 % ) (Line : Chip) 1.50 : 1 PARAMETER MIN. MAX. UNITS Primary Inductance (Line Side) 25.4 28.6 mH 20 ohms Flammability: Materials used in the production of these units meet requirements of UL94-VO and IEC 695-2-2 needle flame test. Pins 1 to 5 with 2 & 4 shorted. Primary DC Resistance Schematic Diagram Secondary DC Resistance 3.0 Isolation (Hi-Pot) ohms 2000 DC Bias PRI lin e VRMS 60 SEC d e vice mA Return Loss 10KHz & 25 KHz 20 dB Longitudinal Balance (281 Hz to 40 KHz) 55 dB NOTE: Operating Temp. Range -400C to +850C Primary is Line Side (Pins 1,2,4,5) Secondary is Chip Side (Pins 7,8,9) Surge Voltage Capability .570 (14.48) MAX. 1.070 (27.18) REF. Metallic Voltage: 800 V peak, 10/560 µS .470 (11.94) MAX. .900 (22.86) REF. Longitudinal Voltage: 2400 V peak, 10/700 µS 10 1 Top View 1.19 (30.23) 2 9 3 8 4 7 5 6 .040 (1.02) TYP. .920 (23.37) MAX. .150 (3.81) TYP. .150 (3.81) Physical Dimensions inches (mm) .080 (2.03) .180 (4.57) .090 (2.29) TYP. Notch Indicates Pin #1 1.10 (27.94) 1.04 (26.42) RHOMBUS P/N: T-13212G CUST P/N: DATE: 7/2/96 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