2796A4

MODEM MAGNETICS PCMCIA V.34 Modem Transformers TM00407 • Designed to match a 600Ω line to a 301Ω load while providing isolation and balance in PCMCIA Type II V.34 modem applications Qualified per Bellcore TR-TSY-000357-1 Approved by UL and CSA • Each transformer, while being identical electrically, has a distinctive terminal configuration to accommodate different PWB offsets in the PC card Minimum interwinding breakdown voltage of 1000 Vrms • • • ELECTRICAL SPECIFICATIONS at 25° C Insertion Loss dB @ 1 kHz 2796A 2796A2 2796A3 2796A4 2796A5 Return Loss dB Frequency Response dB 200 Hz - 5 kHz Pri DCR Ω max Sec Harmonic Distortion dB -10 dBm, 600 Hz Longitudinal Balance dB 300 Hz - 3500 Hz Part Number Turns Ratio ± 2% 300 Hz - 3500 Hz 1:1 < 2.7 > 30 < 0.1 165 165 > 80 > 60 SCHEMATIC 2796A 2796A2 2796A3 2796A4 2796A5 1 6 3 Primary 4 Secondary TYPICAL SPICE TRANSMISSION MODEL 153 0.5 mH 154 20 pF 19 k 3.5 H 20 pF ©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 T4-15 MODEM MAGNETICS TM00407 PCMCIA V.34 Modem Transformers MECHANICAL 0.460 [11.68] max 0.025 [0.635] 2796A 2796A2 2796A3 2796A4 2796A5 4 0.200 0.330 [5.08] [8.38] max 3 6 1 Terminal 1 Identifier 2796A 0.096 [2.44] 0.600 [15.24] ref 0.020 [0.508] ref 0.170 [4.32] max 0.096 [2.44] Note: Unless otherwise specified, dimensions are nominal and in inches [millimeters]. 2796A2 0.084 [2.13] 2796A4 0.064 [1.63] 2796A5 0.052 [1.32] 0.005 [0.13] 2796A3 ©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 T4-16