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| HIGH FREQUECY MAGNETICS T1/E1 Surface Mount Transformers TM00138 * Operates 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 Low capacitance design with specific interwinding insulation (2779L) 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 2779G 2779L 1 : 1.14 CT 1 : 1.14 CT Inductance2 mH min (4-1) 1.80 1.25 (4-1) 1.2 0.9 DCR Leakage Inductance3 H max (5-8)1 1.4 0.5 (4-1)1 1.3 1.8 Interwinding Capacitance1 pF (4-1) & (5-8)1 20 typ 10 max Minimum Interwinding Breakdown Voltage Vrms 1500 1500 max Part Number 1. connect 6 to 7 2. measured at 10 kHz, 0.1 Vac 3. measured at 100 kHz SCHEMATIC 2779G 2779L 4 5 7 CT 6 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 T1-85 HIGH FREQUECY MAGNETICS TM00138 T1/E1 Surface Mount Transformers MECHANICAL 2779G 2779L 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 T1-86 |
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