October 14, 2009 V.22bis MODEM TRANSFORMER PT79281 Designed for use with Teridian 73M1903, 73M1903C, 73M2901CE & 73M2901CL V.22bis modems for voice applications including high speed data modems, satellite set-top boxes, POS terminals, MFP and FAX terminals and IP phones. Electrical Specifications @ 25°C 600 Typ, @1kHz 1Vrms*. Impedance, Primary Total Harmonic Distortion -78 dB Max, @600Hz -10dBm* Insertion loss 1.90 dB Max, @ 1kHz, 0dBm* Frequency response ±0.15 dB, @ 200-4000 Hz 0dBm* (relative to 1 KHz) Return loss 20 dB Min, @ 200Hz, Per 600 Ohm Match. Return loss 20 dB Min, @ 200Hz, Per Pan-Euro CTR21 Match D.C. resistance @20°C Primary = 82 Typ Secondary = 106 Typ Turns Ratio (1-2) : (4-3) 1:1 ±2% Dielectric strength Pri.to Sec. 3750Vrms 0.5mA Max., 1 minute Min. D.C. Current in Primary 0mA Operating Temperature -40 to +105 °C Storage Temperature -40 to +125 °C Shunt Inductance Lp, Primary 4.6H Typ., @1kHz 1Vrms. Shunt Loss Rp, Primary 26K Typ., @1kHz 1Vrms. Leakage Inductance 3.7mH Typ., @1kHz 1Vrms. (* = test with load 420 at Secondary) Mechanical Outline and Schematic 2 3 Primary Secondary 1 4 SCHEMATIC All dimensions in millimeters Unless otherwise specified, tolerance ±0.25mm 600 Ohm Match DATATRONIC: Pan-Euro CTR21 Match 28151 Highway 74, Romoland, CA 92585 Tel 951-928-7700, FAX 951-928-7701 Email: [email protected] 499 King’s Road, Hong Kong Tel: (852) 2562 3858, (852) 2564 8477 Fax: (852) 2565 7214, (852) 2563 1290 All specifications are subject to change without notice.