MODEM MAGNETICS PCMCIA V.90 Transformers • • Designed to match a 600Ω line to a 290Ω load while providing isolation and balance in PCMCIA Type II V.90 modem applications TM00404 • Minimum interwinding breakdown voltage of 1000 Vrms • Qualified per Bellcore TR-TSY-000357-1 Approved by UL and CSA ELECTRICAL SPECIFICATIONS AT 25° C Part Number Turns Ratio ± 2% Insertion Loss dB Return Loss dB Frequency Response dB DCR Ω max @ 1 kHz 300 Hz - 3500 Hz 200 Hz - 5 kHz Pri Harmonic Distortion dB Longitudinal Balance dB Sec -10 dBm, 600 Hz 300 Hz - 3500 Hz 2786A 1:1 < 2.9 > 30 < 0.1 165 200 > 85 > 60 2786A3 1:1 < 2.9 > 30 < 0.1 165 200 > 85 > 60 2786A5 1:1 < 2.9 > 30 < 0.1 165 200 > 85 > 60 SCHEMATIC 2786A 2786A3 2786A5 1 6 3 4 Primary Secondary TYPICAL SPICE TRANSMISSION MODEL 145 1.4 mH 175 1 6 20 pF 25 k 3.0 H 3 20 pF 4 ©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 T4-9 MODEM MAGNETICS PCMCIA V.90 Transformers TM00404 MECHANICALS 0.560 [14.22] max .025 [0.635] 2786A 0.330 [8.38] 0.200 max [5.08] 4 3 6 1 Terminal 1 Identifier 0.040 [1.02] ref 0.750 [19.05] ref 0.172 [4.37] max 0.096 [2.44] Note: Unless otherwise specified, dimensions are nominal and in inches [millimeters]. 0.040 [1.02] 2786A3 0.180 [4.57] max 0.005 [0.127] 0.750 [19.05] ref 0.750 [19.05] ref 2786A5 0.040 [1.02] 0.172 [4.37] max 0.052 [1.32] ©2000 Bel Fuse Inc. Specifications subject to change without notice. 05.00 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 T4-10