HIGH FREQUENCY MAGNETICS T1/E1 Surface Mount Transformer • Operates as a pulse transformer at the T1 rate of 1.544 Mb/s and the E1 rate of 2.048 Mb/s • Provides voltage transformation and impedance matching for line-interface applications All windings are hardened to handle a 6A surge for 1 second • • TM01102 • 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 Recommended drop-in replacement for nonhardened applications is 2779C ELECTRICAL SPECIFICATIONS AT 25° C Turns Ratio ±2% Inductance 2 mH min Leakage Inductance 3 µH max (4-1) : (5-8)1 (4-1) (4-1) (4-1) (5-8) 1 (4-1) : (5-8) 1 1 : 1.37CT 0.7 1.2 3 0.35 0.45 45 Part Number 2771G DCR Interwinding Capacitance pF typ Ω max Minimum Interwinding Breakdown Voltage Vrms 850 1. With 6 and 7 connected. 2. 10 kHz, 0.1 Vac 3. 100 kHz, 0.1 Vac SCHEMATIC 2771G 4 5 7 CT 6 1 8 1 : 1.37CT ©2001 Bel Fuse Inc. Specifications subject to change without notice. 02.01 Bel Fuse Inc. 198 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com page 1 HIGH FREQUENCY MAGNETICS T1/E1 Surface Mount Transformer TM01102 MECHANICAL 2771G 0.160 (4.06) REF 0.120 (3.05) REF 0.430 (10.92) MAX 0.495 (12.57) MAX TERMINAL 1 IDENTIFIER 0.590 (15.0) MAX 0.395 (10.03) MAX 0.024 (0.061) (PHOSPHOR BRONZE, SOLDER COASTED) 0.004 (0.10) 8 EDGES 0.100 (2.54) COMPONENT CENTER 0.255 (6.48) 0.120 (3.05) 0.045 (1.14) 0.008 (0.203) 2 PLACES NOTE: Unless otherwise specified, dimensions are nominal and in inches (millimeters). ©2001 Bel Fuse Inc. Specifications subject to change without notice. 02.01 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 F23, Preston Lancashire, PR1 8UD, U.K. Tel 44-1772-556601 Fax 44-1772-888366 www.belfuse.com page 2