HIGH FREQUENCY MAGNETICS T1/E1 Single Through Hole Transformers • Operate over DS1 rates (1.544 Mbits/s) and CEPT international rates (2.048 Mbits/s) • Service the transmit side of the line interface • Only difference between 2662K and 2662K2 is the terminal length • Inductance unbalance of center-tapped winding is 0.3%, max • Recommended transformer for new through-hole applications is 2745CA2 TM00155 • Operating Temperature Range: -40° to +85° C • Meets IEC 695, 2-2 flammability requirements • PWB Process Capability: Standard Printed Wiring Board assembly techniques, total-immersion cleaning • Reliability testing: Shock, vibration, temperature cycling, temperature - humidity - bias ELECTRICAL SPECIFICATIONS AT 25° C DCR Ω max Turns Ratio ± 2% Inductance µH min1 (1-3):(4-6) (1-3) (1-3) (4-6) 2662K 1 : 1.37 CT 680 1.0 2662K2 1 : 1.37 CT 680 1.0 Part Number Leakage Inductance2 µH max Effective Distributed Capacitance pF Primary ET Constant V-µs MInimum Interwinding Breakdown Voltage Vrms 1.4 1.3 15 21 500 1.4 1.3 15 21 500 1. measured at 10 kHz, 0.1 Vac 2. measured at 100 kHz, 0.1 Vac SCHEMATIC 2662K 2662K2 4 1 5 CT 6 3 1 : 1.37 ©2000 Bel Fuse Inc. Specifications subject to change without notice. 08.00 Bel Fuse Inc. 198 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com T1-27 HIGH FREQUENCY MAGNETICS T1/E1 Single Through Hole Transformers TM00155 MECHANICAL 2662K2 2662K 0.36 (9.14) MAX 0.36 (9.14) MAX 0.51 (12.95) MAX 0.51 (12.95) MAX 0.45 (11.43) MAX 0.45 (11.43) MAX 0.155 (3.94) 0.015 (0.38) X 0.025 (0.63) (PHOSPHOR BRONZE, SOLDER COATED) 1 6 2 3 5 4 0.200 (5.08) 0.015 (0.38) X 0.025 (0.63) (PHOSPHOR BRONZE, SOLDER COATED) 0.110 (2.97) 1 6 0.150 (3.81) TYP 2 5 3 4 0.200 (5.08) 0.150 (3.81) TYP Unless otherwise specified, dimensions are nominal and in inches (millimeters). ©2000 Bel Fuse Inc. Specifications subject to change without notice. 08.00 CORPORATE FAR EAST EUROPE Bel Fuse Inc. 198 Van Vorst Street Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com Bel Fuse Ltd. 8F / 8 Luk Hop Street San Po Kong Kowloon, Hong Kong Tel 852-2328-5515 Fax 852-2352-3706 www.belfuse.com Bel Fuse Europe Ltd. Preston Technology Management Centre Marsh Lane, Suite G7, Preston Lancashire, PR1 8UD, U.K. Tel 44-1772-556601 Fax 44-1772-888366 www.belfuse.com T1-28