2798E

ISDN MAGNETICS Dual S Interface Transformers • Meet requirements for pulse template and impedance template according to ITU-T (CCITT I.430) UL and CSA approved • Qualified per Bellcore TR-TSY-000357-1 • • • TM00200 Minimum interwinding breakdown voltage of 1500 Vrms Operating temperature range 0° C to 85° C ELECTRICAL SPECIFICATIONS at 25° C DCR Ω max Part Number Turns Ratio ± 2% Primary Inductance mH min Leakage Inductance µH max Pri Interwinding Capacitance pF max Sec 7.5 6.0 4.45 6.0 3.5 100 100 100 100 100 Distributed Parallel Capacitance pF max 2798A 2798B 2798C 2798D 2798E 1.0 : 2.5 1.0 : 2.0 1.0 : 2.0 1.0 : 2.0 1.0 : 1.0 22.0 22.0 22.0 22.0 22.0 5.0 5.0 3.75 2.5 5.0 3.5 3.5 2.25 3.5 3.5 100 100 80 100 40 Compatible Transceiver ICs Part Number IC Manufacturer IC Part Number T7234 T7250C T7254 T7256 T7259 MC145574 SCHEMATIC 2798A 2798B 2798C 2798D 2798E 1 T1 16 Lucent 2798A Motorola 2 3 15 14 2798B Lucent T7901 T7903 ST5420 ST5421 PEB2080 PEB2081 PEB2084 PEB2085 PEB2086 PEB2186 MTC-2072 MT8930 MT8931 TP3420 TP3421 Am79C30A Am79C32A MC145474 MC145475 SGS Thompson 4 T2 5 13 Siemens 2798C Mietec 12 6 7 11 10 Mitel National Semiconductor 2798D AMD 8 9 Primary Secondary 2798E Motorola ©2000 Bel Fuse Inc. Specifications subject to change without notice. 05.00 Bel Fuse Inc. 198 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com T2-1 ISDN MAGNETICS TM00200 Dual S Interface Transformers 0.950 [24.13] max 0.1.22 [3.10] typ 16 15 14 13 12 11 10 9 MECHANICAL 2798A 2798B 2798C 2798D 2798E 1 2 3 4 5 6 7 8 0.100 [2.54] typ 0.300 [7.62] max 0.595 [15.11] typ 0.015 [0.38] 0.705 [17.91] + 0.010 [0.25] – 0.005 [0.13] Note: Unless otherwise specified, dimensions are nominal and in inches [millimeters]. 0.030 [0.76] Terminal Pad 0.035 [0.89] 0.755 [19.18] typ 0.060 [1.52] typ 0.060 [1.52] typ 0.100 [2.54] typ Suggested PCB Pad Layout Tape and reel packaging: 400 parts/reel ©2000 Bel Fuse Inc. Specifications subject to change without notice. 05.00 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 T2-2