specifications are subject to change without notice. SM540-1 & pt541-1 adsl line transformers features for use with alcatel s mtk-20140 adsl chipset excellent total harmonic distortion (thd) performance both smt and thru-hole package version small size operating temperature -40 ? to +85 ? designed to meet ul1950 and en60950 supplementary insulation requirements for operating voltages up to 250 vrms applications adsl - alcatel mtk20140 electrical specifications @ 25 ? tu r ns ratio (1-4):(10-7) (line to chip) SM540-1 ................................1:1 ? % pt541-1 ................................2:1 ? % ocl @ 10 khz, 0.1 v (1-4) with (2-3) shorted SM540-1........................480 ? ?0 % pt541-1 ........................410 ? ?0 % leakage inductance @ 300 khz 0.1 v (1-4) with (2-3), (7-10), (8-9) shorted SM540-1 ........................10.0 ? max. pt541-1 ............................6.5 ? max. longitudinal balance 30 khz to 1.1 mhz ............-40 db min. insertion loss @ 100 khz and 1.1 mhz ..........<1.0 db isolation voltage ............1500 vrms max. dc resistance (1-4) with (2-3) shorted SM540-1 ............................1.0 ? max. pt541-1 ..............................0.6 ? max. thd linearity SM540-1 @ 10 khz (min.) ..-72 db typ. pt541-1 @ 20 khz (min.) ....-72 db typ. application SM540-1........................................cpe pt541-1 ..........................................co product dimensions electrical schematic dimensions are: mm (inches) tolerance: 0.25 (.010) SM540-1 (datecode) 5 4 3 2 1 6 7 8 9 10 .711 .050 (.028 .002) recommended pad layout 10 plcs. 1.30 .050 (.051 .002) 10 plcs. 13.46 (.530) max. 10.00 (.394) max. 17.65 (.695) max. 13.50 (.531) max. 12.32 (.485) max. 12.07 (.475) max. 2.50 (.098) 2.54 (.100) 2.50 (.098) 10.00 (.394) 15.37 (.605) 0.13 (.005) 10 surfaces smt 10 8 9 7 1 3 2 4 SM540-1 pt541-1 tht pt541-1 (datecode) 2.6 (.102) dia. 10 plcs. min. 14.0 (.551) max. 14.2 (.559) max. 12.70 (.500) max. 0.6 (.024) 10.00 (.394) 10.00 (.394) 2.50 (.098) packaging specifications SM540-1* ............................200 pcs./reel pt541-1 ................................60 pcs./tray *??suffix at end of part number designates tape & reel packaging, e.g. SM540-1e. re liable electronic solutions asia-pacific: tel +886-2 25624117 f ax +886-2 25624116 europe: tel +41-41 7685555 f ax +41-41 7685510 n. america: tel +1-909 781-5500 f ax +1-909 781-5700 www.bourns.com copyright?2003, bourns, inc. litho in u.s.a. e 04/03 /sp0207 04/03
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