CABLE MODEM MAGNETICS Wideband RF Transformers • Optimized for use in the upstream data path within cable modem applications • Designed for use with a variety of high frequency drivers • Excellent insertion loss and return loss characteristics • Operating temperature 0° to 70° C • Storage temperature -40° to +100° C • Minimum interwinding breakdown voltage of 1500 Vrms ELECTRICAL SPECIFICATIONS at 25° C Turns Ratio ±3% Insertion Loss dB max Return Loss dB min Part Number Pri : Sec 1MHz to 250MHz 5MHz to 65MHz 30MHz to 60MHz S554-5999-03 1 : 2CT 1.5 0.5 18 S554-5999-06 1 : 2CT 1.5 0.5 18 DCR Ω max Primary Inductance µH min Hipot Vrms min Pri Sec 30 0.250 0.500 1500 30 0.300 0.750 1500 SCHEMATIC S554-5999-03 S554-5999-06 1 1 : 2CT 6 5 3 4 ©2000 Bel Fuse Inc. Specifications subject to change without notice. 12.00 Bel Fuse Inc. 198 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com CABLE MODEM MAGNETICS Wideband RF Transformers MECHANICAL S554-5999-03 S554-5999-06 0.300 [7.62] max 0.375 [9.52] max 0.100 [2.54] 0.425 [10.80] 0.285 [7.24] max 0.100 [2.54] pitch 0.018 ±0.002 [0.46 ±0.05] 0.003 [0.08] min 0.225 [5.72] max 0.070 [1.78] 0.030 [0.76] Suggested PCB Pad Layout 0.012 [0.30] max 4˚ nom 0.004 [0.10] 0.200 [5.08] 0.035 [0.88] Dimensions are in inches [millimeters]. Standard dimension tolerance is ±0.005 [0.13] unless otherwise noted. ©2000 Bel Fuse Inc. Specifications subject to change without notice. 12.00 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