MODEM TRANSFORMER PT79546 Qualified to Teridian 73M2901CE low speed modem and the 73M1903 modem AFE in high and low speed applications chip sets. Electrical Specifications @ 25°C Impedance, Primary 600Ω Typ. @ 1kHz 1Vrms* Total Harmonic Distortion Insertion loss Frequency response Return loss Return loss D.C. resistance @20°C -82 dB Max. @ 600Hz -10dBm* 1.90 dB Max. @ 1kHz, 0dBm* ±0.15 dB @ 200-4000 Hz 0dBm* (relative to 1kHz) 20 dB Min. @ 200Hz Per 600 Ohm Match. 20 dB Min. @ 200Hz Per Pan-Euro CTR21 Match Primary = 82Ω ±15% Secondary = 106Ω ±15% Turns Ratio (4-3-2) : (9-7) 1CT : 1 ±2% Dielectric strength Pri.to Sec. 1500Vrms 1 min. (Production test 2000Vrms 2s minimum) D.C. Current in Primary 0mA Operating Temperature -40 to +105 °C Storage Temperature -40 to +125 °C Shunt Inductance Lp, Primary 3.2H Min. @1kHz 1Vrms. Shunt Loss Rp, Primary 1.2MΩ Min. @ 1kHz 1Vrms. Leakage Inductance 4.5mH ±15% @ 1kHz 1Vrms. (* = test with 420Ω load at Secondary) Mechanical Outline and Schematic Pri Dot indicates pin 1 PT79546 DATE PRC Sec 2 9 13.5 MAX 3 4 7 SCHEMATIC 2.5 MIN 2.54 (4X) 1 2 3 4 5 ∅ 0.60 TYP (10X) 10.16 14.5 MAX All dimensions in millimeters Unless otherwise specified, tolerance ±0.25mm 10 9 8 7 6 14.5 MAX 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.