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 Ω max Leakage Inductance µH 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 ©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). ©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