T-977

PARAMETER Turns Ratio Line Impedance Inductance 1 Longitudinal Balance 5 kHz to 292 kHz Primary DC Resistance Pins (2-4) Secondary DC Resistance (6-8) or (8-10) Frequency Response 40kHz - 300kHz Insertion Loss @ 100kHz Isolation (HI-POT) Primary DC Return Loss @ 100kHz THD (5 KHz, 6Vp-p 135 Ω) 1CT : 1.8CT +3% 135 2.75+ 6% UNITS T-977 HDSL TRANSFORMER Designed for HDSL applications Compatible with Level One SK70704 Low Profile "Touch Tone" design A Surface Mount version of this transformer is available SCHEMATIC DIAGRAM Ω mH 50 min. 3.2 Max. 3.0 Max. +0.2 dB Ω Ω dB 0.3 2000 75 20 min. -75 Min. dB VRMS mA dB dB 4 PRI 3 6 8 SEC 10 Line Side Pins 6-10 Chip Side Pins 4-2 Primary is Chip Side Secondary is Line Side 2 1. Line Side, Pins (10-6), @ 10KHz and 100 mV Operating Temp. Range -400C to +850C Surge Voltage Capability: Metallic Voltage: 800 V peak, 10/700 µS Longitudinal Voltage: 2400 V peak, 10/560 µS Physical Dimensions in inches (mm) 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