PARAMETER T-997G UNITS Turns Ratio DDS Aplications Pulse Transformers 1 : 1 +1% Line Impedance 135 Ω Inductance (Line Side) 200 Min mH Leakage Inductance 10 kHz - 1VRMS 60 Max. µH Primary DC Resistance 18.2 Max. Ω Secondary DC Resistance 18.2 Max. Ω Frequency Response 100 Hz - 112 kHz 1.0 Typ. dB Insertion Loss @ 10kHz 1.25 Typ. dB Isolation (HI-POT) 1875 VRMS Primary DC 0 mA Return Loss @ 100 Hz - 100 kHz 15 Typ. dB Longitudinal Balance 200 - 1000 Hz 40 Typ. 15 kHz 35 Typ. dB dB Interwinding Capacitance 10 kHz - 1 VRMS pF 65 Max. Designed to meet the requirements of Bellcore TR-NWT-000499, Synchronous Digital Data Interface-64 Kbps and Subrates Recomended for use with level one LXT400 & LXT456 Custom versions of this transformer are available. A Surface Mount version of this transformer is available Compatible with Level One transceiver ICs SCHEMATIC DIAGRAM: 1 10 3 5 Physical Dimensions in inches (mm) .522 (13.26) MAX. .025 (0.64) 6 Secondary .715 (18.15) 1 2 3 .028 (0.70) Primary .532 (13.51) MAX. .516 (13.1) MAX. .100 (2.54) 8 10 Suggested Pad Layout 4 .516 (13.1) 8 7 5 .100 (2.54) TYP. .675 (17.15) .663 (16.85) 9 .100 (2.54) TYP. .050 (1.27) TYP. 6 4/15/98 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