2800C

ISDN MAGNETICS Dual S Interface Transformers • • Low profile 0.175" package Compatible with PC card applications • • • TM9938 Minimum interwinding breakdown voltage of 1500 Vrms Qualified per Bellcore TR-TSY-000357-1 UL and CSA approved ELECTRICAL SPECIFICATIONS at 25° C DCR Ω max Pri 2800A 2800B 2800C 2800D 2800E 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 4.75 5.0 3.75 2.50 5.00 6.0 6.0 6.0 6.0 6.0 Sec 10.5 8.5 8.5 8.5 6.0 100 100 100 100 100 Part Number Turns Ratio ± 2% Primary Inductance* mH min Leakage Inductance µH max Interwinding Capacitance pF max Distributed Parallel Capacitance pF max 100 100 100 100 100 * Measured at 10 kHz, 0.5 Vac Compatible Transceiver ICs Part Number IC Manufacturer IC Part Number T7250C T7256 T7234 T7901 T7903 PEB2081 PEB2085 PEB2086 MT8930 TP3420 TP3421 MTC-2072 79C30A 79C32A MC145474 MC145475 SCHEMATIC 1 2800A 2800B 2800C 2800D 2800E T1 16 2800A Lucent 2 3 15 14 2800B Lucent 4 T2 5 13 Siemens Mitel 2800C National Semiconductor Alcatel 12 6 7 11 10 2800D AMD 2800E Motorola 8 Primary ©1999 Bel Fuse Inc. 9 Secondary Specifications subject to change without notice. 06.99 Bel Fuse Inc. 198 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com T328 ISDN MAGNETICS TM9938 Dual S Interface Transformers MECHANICAL 0.945 [24.00] max 16 15 14 13 12 11 10 9 2800A 2800B 2800C 2800D 2800E Terminal 1 ID 1 2 3 4 5 6 7 8 0.100[2.54] typ 0.175 [4.44] max 0.600 [15.24] 0.715 [18.16] +0.010 [0.25] – 0.005 [0.13] Note: Unless otherwise specified, dimensions are nominal and in inches [millimeters]. 0.065 [1.65] Terminal Pad Board Cutout 0.615 [15.62] 0.745 [18.92] 0.107 [2.72] typ 0.060 [1.52] typ 0.100 [2.54] typ 0.975 [24.76] 0.050 [1.27] typ Suggested PCB Pad Layout ©1999 Bel Fuse Inc. Specifications subject to change without notice. 06.99 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 F23, Preston Lancashire, PR1 8UD, U.K. Tel 44-1772-556601 Fax 44-1772-888366 www.belfuse.com T329