PARAMETER T-997NC 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 Typ. Ω Secondary DC Resistance 18.2 Typ. 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 .536 (13.61) MAX. .550 (13.97) MAX. 5 8 Primary 6 Secondary PIN POSITION GRID 0.100 (2.54) .525 (13.34) MAX. HOLES FOR BOBBIN PINS .210 (5.33) TYP. .100 (2.54) TYP. 10 9 8 7 .400 (10.16) TYP. Pin Diameter is 0.025 (0.64) 6 Physical Dimensions in inches (mm) Bottom View 1 2 3 4 5 Rhombus Industries Inc. Transformers & Magnetic Products 4/15/98 15801 Chemical Lane, Huntington Beach, CA 92649 Phone: (714) 898-0960 FAX: (714) 896-0971 www.rhombus-ind.com