The BD4859N50100AHF is a low cost, low pr ofile sub miniature unbalanced to balanced transformer designed for differential i nputs and output locations on modern chipsets in an easy to use surface mount pac kage covering 802.11a Uni Band II & III and the Japanese ISM band (4.9 GHz).The BD4859N50100AHF is ideal for high volume manufacturing and delivers hi gher performance than traditional ceramic baluns. The BD4859N50100AHF has an unbalanc ed port impedance of 50 and a 100 balanced port impedance. This transformation enabl es single ended signals to be applied to differential ports o n modern integrated chipsets. The output ports have equal amplitude ( 3dB) with 180 d egree phase differential. The BD4859N50100AHF is available on tape and reel for p ick and place high volume manufacturing.