PARAMETER T-1318G UNITS Turns Ratio1 HDSL2 TRANSFORMER 1 : 2.3 +3% Inductance2 1.75 +8% mH Longitudinal Balance 20 kHz to 600 kHz 50 min. dB Primary DCR (Pins 7-9) 2.9 Max. Ω Secondary DCR (Pins 5-2 or 4-1) 3.6 Max. Ω Frequency Response 40kHz - 300kHz +0.2 dB Insertion Loss @ 100kHz 0.3 Designed for HDSL2 applications Compatible with Level One SK70740/41/42 Low Profile "Touch Tone" design SCHEMATIC DIAGRAM dB Isolation (HI-POT) 3000 VRMS Primary DC 160 mA Return Loss @ 100kHz 16.5 min. dB THD (10 KHz, 4.95VRMS) -75 Min. dB 7 5 8 2 4 9 1 Line Side Pins 5 - 2, 4 - 1 Chip Side Pins 7 - 9 1. Chip Side : Line Side (Short pins 2 & 4). 2. Line Side, Pins (1-5) with 2,4 shorted@ 10KHz and 100 mV Operating Temp. Range -400C to +850C Primary is Chip Side Secondary is Line Side 1.070 (27.18) REF. .900 (22.86) REF. Surge Voltage Capability: Metallic Voltage: 800 V peak, 10/700 µS .570 (14.48) MAX. .040 (1.02) TYP. Longitudinal Voltage: 2400 V peak, 10/560 µS 1 2 1.19 (30.23) Top View 10 9 3 8 4 7 5 6 .920 (23.37) MAX. .150 (3.81) TYP. .470 (11.94) MAX. .150 (3.81) .080 (2.03) .180 (4.57) .090 (2.29) TYP. 1.10 (27.94) 1.04 (26.42) Physical Dimensions in inches (mm) Notch on bobbin indicates pin #1 12/19/00 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