HIGH FREQUENCY MAGNETICS Miniature Dual Turns Ratio Surface Mount Transformers • Transformers provide a dual turns ratio for DS1, CEPT 75 and CEPT 120 line interface functions • Maximum inductance unbalance of center-tapped winding is 0.2% • TM00145 • 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 Metallic surge voltage capability for 2795Y is 5000V peak • Reliability testing: shock, vibration, temperature cycling, temperature - humidity - bias Minimum interwinding breakdown voltage of 1500 Vrms • For 2795T and 2795Y application note refer to document TM00145B • For 2795N application note refer to document TM00145A ELECTRICAL SPECIFICATIONS at 25° C Primary Inductance1 mH min Turns Ratio ± 1% Part Number DCR Ω max Leakage Inductance2 µH max Interwinding Capacitance pF typ (4 - 1) : (3 - 6) (4 - 5) : (3 - 6) (4 - 1) (4 - 1) (4 - 5) (4 - 5) (4 - 1) (3 - 6) 2795G 1 : 1.14CT 1 : 1.35CT 1.8 --- 0.8 1.8 2.2 2.5 35 2795N 1 : 1.070CT 1 : 1.353CT 1.7 0.6 0.5 1.7 2.2 2.3 36 2795T 1 : 1.89CT 1 : 2.40CT 1.3 0.6 0.45 1.4 1.8 3.3 47 Part Number (3 - 6) : (4 - 5) (3 - 6) : (4 - 1) (3 - 6) -- (4 - 5) (4 - 1) (3 - 6) 2795Y 1 : 1.89 1 : 2.39 0.3 -- 0.8 1.1 0.3 1.6 43 1. Measured at 10 kHz, 0.1 Vac 2. Measured at 100 kHz, 0.1 Vac SCHEMATICS 2795Y 2795G 2795N 2795T 4 3 3 2 CT 2 4 5 5 1 6 6 1 Note: Pins 2 and 3 must be connected externally. ©2000 Bel Fuse Inc. Specifications subject to change without notice. 07.00 Bel Fuse Inc. 198 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com T1-99 HIGH FREQUENCY MAGNETICS Miniature Dual Turns Ratio Surface Mount Transformers TM00145 MECHANICAL 2795G 2795N 2795T 2795Y 0.240 [6.10] max 6 5 4 0.186 [4.72] A 0.073 [1.85] 0.265 [6.73] ref 0.057 [1.45] 0.364 [9.25] A 0.065 [1.65] 0.040 [1.02] 0.347 [8.80] max 0.234 [5.95] No metallization or solder mask in cross-hatched designated area Terminal 1 ID 1 2 0.020 [0.51] 3 0.073 [1.85] 0.033 (0.84) 0.265 [6.73] max 0.055 [1.40] Supplementary Information Operating Temperature Range Safety Agency Compatibility Surge Voltage Capability Metallic Voltage Longitudinal Voltage Flammability Compliance Qualification Compliance Simulation Model Surface-Mount Packaging Terminal Lead Coplanarity PWB Process Capability Suggested PCB Pad Layout Note: Unless otherwise specified, dimensions are nominal and in inches [millimeters]. –40° C to +85° C Underwriters Laboratories, Inc. UL 1459 10/700 µs; 10 repetitions of alternating polarity 2500 V peak generator output, 25Ω generator resistance 2500 V peak generator output, 25Ω generator resistance IEC-695, 2-2 (needle flame test), materials are UL 94 VO approved Bellcore TR-TSY-000357-1(shock, vibration, temperature cycling, temperature-humidity-bias) SPICE computer simulation file available on request Tape and Reel; 16 mm wide by 12 mm pitch; 13 inch OD; 4 inch ID 650 transformers per reel, maximum Meets ANSI/EIA 481-2 Carrier Tape Standards—JEDEC SO package 0.004 inch [0.10 mm] Standard printed-wiring board assembly and cleaning techniques Standard solder reflow techniques Machine placement (recommendation: locate by terminals, not body) ©2000 Bel Fuse Inc. Specifications subject to change without notice. 07.00 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 G7, Preston Lancashire, PR1 8UD, U.K. Tel 44-1772-556601 Fax 44-1772-888366 www.belfuse.com T1-100