2771F

HIGH FREQUENCY MAGNETICS T1/E1 Dual-Output Surface Mount Transformer • Operates at T1 rate of 1.544 Mb/s and the E1 rate of 2.048 Mb/s Two center-tapped secondary windings provide two output signals from a single input Minimum interwinding breakdown voltage of 1500 Vrms • • • • 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 TM00134 • • ELECTRICAL SPECIFICATIONS AT 25° C Turns Ratio ±2% Part Number (4-5):(1-3) 2771F 1 : 2CT (4-5):(8-6) 1 : 2CT (4-5) 3.1 Inductance1 mH min Leakage Inductance2 µH max (4-5) 5 (4-5) 1.8 DCR Interwinding Capacitance pF Ω max (3-1) 3.2 (8-6) 4.0 (4-5) : (1-3) 20 (4-5) : (8-6) 25 1. measured at 10 kHz, 0.1 V 2. measured at 100 kHz SCHEMATIC 2771F 1 4 2 3 8 7 6 1 : 2 CT : 2 CT 5 ©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 T1-77 HIGH FREQUENCY MAGNETICS TM00134 T1/E1 Dual-Output Surface Mount Transformer MECHANICAL 2771F 0.160 (11.68) 0.590 (14.99) MAX 87 65 0.120 (3.05) 0.495 0.430 (12.57)(10.92) MAX MAX 1234 TERMINAL 1 IDENTIFIER 0.395 (10.03) MAX 0.004 8 EDGES 0.23 (0.58) X 0.100 (2.54) FOOT (PHOSPHOR BRONZE, SOLDER COATED) 0.100 (2.54) TYP RECOMMENDED PCB PATTERN COMPONENT CENTER 0.255 (6.48) 0.120 (3.05) TYP 0.045 (1.14) TYP 0.008 (0.203) 2 PLACES 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 T1-78