2745AJ

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 Only difference between the 2745CA and 2745CA2 is the terminal length • • • • 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 TM00121 • • • ELECTRICAL SPECIFICATIONS at 25° C Turns Ratio ± 2% Part Number Pri : Sec 2745AJ 2745AJ2 2745CA 2745CA2 1 : 1.07 CT 1 : 1.07 CT 1 : 1.36 CT 1 : 1.36 CT 1.0 1.0 0.92 0.92 0.8 0.8 0.7 0.7 DCR Ω max Pri 0.50 0.50 0.85 0.85 Sec 1.00 1.00 1.2 1.2 N/A N/A 20 20 850 850 1000 1000 ___ ___ 2741H2 2741H2 Interwinding Breakdown Voltage Vrms min Primary Inductance* mH min Leakage Inductance µH max Interwinding Capacitance pFmax Shielded Version * Measured at 10 kHz, 0.1 Vac SCHEMATICS Lucent IC Part Number Receive Application Bel Part Number T7288 T7289A T7290A T1 / CEPT 75 / CEPT 120 DS1 T7630 CEPT 75.1 CEPT 75.2 / CEPT 120 CEPT 75.1 T7688 CEPT 75.2 / CEPT 120 T7689 DS1 DS1 T7690 T7698 CEPT 75.1 CEPT 75.2 / CEPT 120 2745CA2 2745G3 2745G3 2745AJ2 2745CA2 2745CA2 2745G3 2745G3 2745AF2 2745G3 2745AJ2 2745CA2 2745AJ2 2745CA2 2745G3 2745AJ2 2745CA2 2745AJ2 CEPT 75 / CEPT 120 DS1 DS1 2745AF2 2745AF2 2745AF2 Bel Part Number 2745CA2 2745G3 Transmit 2745AJ 2745AJ2 3 4 5 2745AJ2 1 Primary 6 Secondary 2745CA 2745CA2 3 4 2 1 6 Secondary 2745AJ2 2745CA2 Primary ©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 TM00121 T1/E1 Through Hole Transformers 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 0.35 (8.89) MAX 0.35 (8.89) MAX TERMINAL 1 IDENTIFIER 0.155 (3.94) 0.150 (3.81) 1 0.250 (6.35) 6 5 4 2 3 0.023 (0.584) SQ TYP (PHOSPHOR BRONZE, SOLDER COATED) 0.110 (2.79) ±0.010 (0.25) 0.023 (0.584) SQ TYP (PHOSPHOR BRONZE, SOLDER COATED) 0.150 (3.81) 1 2 3 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 Bel Fuse Inc. 198 Van Vorst Street Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com FAR EAST 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 EUROPE 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