model insertion return loss cross talk com. to com. diff. to com. turns ratio loss (db min) rejection ratio mode rejection 1~100 2~30 40 50 60~80 1 30 60 100 1~60 60~100 1~60 60~100 1 mhz mhz mhz mhz mhz mhz (db min) tx/rx (db max) (db min) (db min) ( 5%) electrical characteristics @25 c o rise time & fall time @5.0ns (max), hi-pot test @60sec, 1500vrms, ocl @8ma dc bias 350uh (min) LF8271 -1.0 -18 -17 -14.5 -12 -65 -55 -45 -35 -40 -30 -40 -30 1:1 / 1:1 lf8279 -1.0 -18 -17 -14.5 -12 -65 -55 -45 -35 -40 -30 -40 -30 1:1 / 1:1 mechanical construction schematics LF8271 a-17 a e = 1.50 / 0.059 (ref) unit : mm / inch g = 0.50 0.127 / 0.020 0.005 h = 17.78 / 0.700 (typ) f = 2.54 / 0.100 (typ) i = 7.62 / 0.300 (typ) d = 3.20 0.30 / 0.126 0.012 c = 5.50 0.254 / 0.217 0.010 b = 10.00 0.254 / 0.394 0.010 a = 20.30 0.254 / 0.799 0.010 b d LF8271 c e date code f g i h 15 16 14 tx 3 2 11 10 12 6 rx 1 5 7 lf8279 15 16 14 tx 3 2 11 10 12 6 rx 1 5 7 LF8271 transformer modules fast ethernet 10base-t/100base-tx 252, san ying road, kuei san industrial zone, taoyuan shien, taiwan, r.o.c. tel: 886-3-3591968; fax: 886-3-3591991 delta electronics, inc. (taoyuan plant cpbg) http://www.deltaww.com/products/networking networking components free datasheet http:///
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