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| HIGH FREQUENCY MAGNETICS T1/E1Surface Mount Transformers TM00137 * Operate at the T1 rate of 1.544 Mbits/s and at the E1 rate of 2.048 Mbits/s Designed for transmit and receive line interface applications 1500 Volt isolation * * 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 * * * * ELECTRICAL SPECIFICATIONS AT 25 C Nominal Turns Ratio 2% (4-1):(5-8)1 2779C 2779J 1 : 1.36CT 1 : 1.07CT Inductance2 mH min DCR Leakage Inductance3 H max (5-8)1 1.30 1.10 (4-1)1 0.70 0.80 Interwinding Capacitance4 pF (4-1) & (5-8)1 25 max 20 typ Minimum Interwinding Breakdown Voltage Vrms 1500 1500 max (4-1) 0.85 0.60 Part Number (4-1) 1.0 1.3 1. connect 6 to 7 2. measured at 10 kHz, 0.1 Vac 3. measured at 100 kHz, 0.1 Vac 4. measured at 1 kHz, 1 Vac SCHEMATIC 2779C 2779J 4 5 6 7 1 1:N 8 (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 T1-83 HIGH FREQUENCY MAGNETICS TM00137 T1/E1 Surface Mount Transformers MECHANICAL 2779C 2779J 8 7 6 5 8 TERMINAL 1 IDENTIFIER 1 0.350 (8.89) MAX 0.004 7 6 5 0.256 (6.50) 2 3 4 0.160 (4.06) 0.050 (1.27) 0.100 (2.54) 0.100 1 2 3 4 1 2 3 4 8 EDGES 0.490 (12.45) MAX 0.430 (10.92) MAX 0.500 (12.7) MAX Unless otherwise specified, dimensions are nominal and in inches (millimeters). (c)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 T1-84 |
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