HIGH FREQUENCY MAGNETICS T1/E1 Through Hole Transformers * Operates as a line-interface pulse transformer in DS1 and CEPT applications * Desiged for automatic machine placement into printed wiring boards Only difference between the 2745AJ and 2745AJ2 is the terminal length * * TM00121 * Operating temperature range: -40 C 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 Only difference between the 2745CA and 2745CA2 is the terminal length ELECTRICAL SPECIFICATIONS at 25 C Turns Ratio 2% Part Number Primary Inductance* mH min DCR max Leakage Inductance H max Pri : Sec Pri Sec Interwinding Capacitance pFmax Interwinding Breakdown Voltage Vrms min Shielded Version 2745AJ 1 : 1.07 CT 1.0 0.8 0.50 1.00 N/A 850 ___ 2745AJ2 1 : 1.07 CT 1.0 0.8 0.50 1.00 N/A 850 ___ 2745CA 1 : 1.36 CT 0.92 0.7 0.85 1.2 20 1000 2741H2 2745CA2 1 : 1.36 CT 0.92 0.7 0.85 1.2 20 1000 2741H2 * Measured at 10 kHz, 0.1 Vac SCHEMATICS Lucent IC Part Number Receive Transmit Bel Part Number Bel Part Number Application 2745AJ 2745AJ2 3 4 T7288 CEPT 75 / CEPT 120 2745AF2 2745CA2 T7289A DS1 2745AF2 2745G3 DS1 2745AF2 2745AJ2 T1 / CEPT 75 / CEPT 120 2745AF2 2745CA2 1 6 DS1 2745G3 2745G3 Primary Secondary CEPT 75.1 2745AJ2 2745AJ2 CEPT 75.2 / CEPT 120 2745CA2 2745CA2 CEPT 75.1 2745AJ2 2745AJ2 CEPT 75.2 / CEPT 120 2745CA2 2745CA2 DS1 2745G3 2745G3 DS1 2745G3 2745G3 CEPT 75.1 2745AJ2 2745AJ2 CEPT 75.2 / CEPT 120 2745CA2 2745CA2 5 T7290A T7630 T7688 T7689 T7690 T7698 2745CA 2745CA2 3 4 2 1 6 Primary Secondary (c)2000 Bel Fuse Inc. Specifications subject to change without notice. 09.00 Bel Fuse Inc. 198 Van Vorst Street, Jersey City, NJ 07302 * Tel 201-432-0463 * Fax 201-432-9542 * www.belfuse.com T1-47 HIGH FREQUENCY MAGNETICS T1/E1 Through Hole Transformers TM00121 MECHANICAL 2745AJ 2745CA 2745AJ2 2745CA2 0.56 (14.22) MAX 0.56 (14.22) MAX 0.46 (11.68) MAX 0.46 (11.68) MAX TERMINAL 1 IDENTIFIER TERMINAL 1 IDENTIFIER 0.35 (8.89) MAX 0.35 (8.89) MAX 0.023 (0.584) SQ TYP (PHOSPHOR BRONZE, SOLDER COATED) 0.155 (3.94) 0.023 (0.584) SQ TYP (PHOSPHOR BRONZE, SOLDER COATED) 0.150 (3.81) 0.110 (2.79) 0.010 (0.25) 0.150 (3.81) 1 2 3 1 2 3 6 5 4 0.250 (6.35) 0.250 (6.35) 6 5 4 Unless otherwise specified, dimensions are nominal and in inches (millimeters). (c)2000 Bel Fuse Inc. Specifications subject to change without notice. 09.00 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 T1-48