UNITS T-977 135 Ω HDSL TRANSFORMER Inductance 1 2.75+ 6% mH Designed for HDSL applications Longitudinal Balance 5 kHz to 292 kHz 50 min. dB Compatible with Level One SK70704 Primary DC Resistance Pins (2-4) 3.2 Max. Ω Low Profile "Touch Tone" design Secondary DC Resistance (6-8) or (8-10) 3.0 Max. Ω Frequency Response 40kHz - 300kHz +0.2 dB Insertion Loss @ 100kHz 0.3 dB Isolation (HI-POT) 2000 VRMS Primary DC 75 mA Return Loss @ 100kHz 20 min. dB THD (5 KHz, 6Vp-p 135 Ω) -75 Min. dB PARAMETER Turns Ratio 1CT : 1.8CT +3% Line Impedance A Surface Mount version of this transformer is available SCHEMATIC DIAGRAM 4 6 8 SEC PRI 3 2 10 Line Side Pins 6-10 Chip Side Pins 4-2 1. Line Side, Pins (10-6), @ 10KHz and 100 mV Primary is Chip Side Secondary is Line Side Operating Temp. Range -400C to +850C Surge Voltage Capability: Metallic Voltage: 800 V peak, 10/700 µS Physical Dimensions in inches (mm) Longitudinal Voltage: 2400 V peak, 10/560 µS POSITION GRID (P.C. PATTERN, COMPONENT SIDE) .800 (20.32) .150 (3.81) TYP. .060 DIA. (1.52) TYP. Notch on bobbin indicates pin #1 1/22/96 Rhombus Industries Inc. Transformers & Magnetic Products 15801 Chemical Lane, Huntington Beach, CA 92649 Phone: (714) 898-0960 FAX: (714) 896-0971 www.rhombus-ind.com