Low Profile Modem Coupling and Voiceband Transformers Low Distortion Schematic "A" Frequency Range: 300Hz to 3500Hz Isolation is 1500VRMS Min. PRI Low Profile Package Designed to meet FCC part 68 Schematic "B" SEC SEC PRI 1 7 1 7 6 12 6 12 Custom Designs Available Electrical Specifications at 25OC Parameter T-31104 T-31105 T-31106 Units 600 530 600 600 600 470 Ω Ω 1:1 1:1 1:1 maximum 70 60 80 mA PRI. + 10% SEC. + 10% 70 81 75 80 62.4 60.1 Ω Ω Insertion Loss max., ref. 1 kHz 1.3 2.0 1.3 dB Return Loss min., @ 300 Hz 25 20 20 dB Longitudinal Balance min., 200Hz to 4kHz 60 60 60 dB Frequency Response 300 Hz to 3.5 kHz + 0.2 +0.5 + 1.0 dB minimum 1500 1500 1500 VRMS A B A Impedance R Load PRI. SEC. Turns Ratio Direct Current in Pri. (DCI) DC Resistance Isolation Schematic Style Dimensions in Inches (mm) 1.10 (27.94) TYP. 1 7 .150 (3.81) TYP. Pins .020 x .027 (0.51 x 0.69) .200 (5.08) .150 (3.81) TYP. Bottom View 6 12 1.45 (36.83) MAX. Specifications subject to change without notice. Rhombus Industries Inc. 1.30 (33.02) MAX. .200 (5.08) TYP. .520 (13.21) TYP. For other values & Custom Designs, contact factory. 6 COUPLNG2 11/98 15801 Chemical Lane, Huntington Beach, CA 92649-1595 Tel: (714) 898-0960 • Fax: (714) 896-0971