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| MODEM MAGNETICS V.90 Modem Transformer * Provides isolation and balance while minimizing signal distortion and insertion loss in high-speed modem applications Designed to match a 600 line to a 374 load with no direct current in the windings * * * Approved by UL and CSA Minimum interwinding breakdown voltage of 1000 Vrms Qualified per Bellcore TR-TSY-000357-1 TM00405 * ELECTRICAL SPECIFICATIONS at 25 C Insertion Loss dB @ 1 kHz Return Loss dB Frequency Response dB 200 Hz - 4 kHz Pri DCR max Sec Harmonic Distortion dB -10 dBm, 600 Hz < -84 Longitudinal Balance dB 300 Hz - 3500 Hz Part Number Turns Ratio 2% 300 Hz - 3500 Hz 2791C 1:1 < 2.0 > 25 < 0.1 118 125 > 60 SCHEMATIC 2791C 1 6 3 Primary 4 Secondary TYPICAL SPICE TRANMISSION MODEL 107 1 20 pF 3 60 k 18 H 20 pF 4 2.8 mH 114 6 (c)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 T4-11 MODEM MAGNETICS TM00405 V.90 Modem Transformer MECHANICAL 2791C 0.48 [12.19] max 0.110 [2.79] 0.023 [0.58] Square, Phosphor Bronze, Solder-Coated 0.69 [17.53] max 0.450 [11.43] Terminal 1 Identifier 0.225 [5.72] 0.71 [18.03] max 0.550 [13.97] 0.275 [5.99] 1 3 6 4 Note: Unless otherwise specified, dimensions are nominal and in inches [millimeters]. (c)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 T4-12 |
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