Description The B4859N5050A00 is a low cost, low profile sub-miniature unbalanced to balanced transformer designed for differential inputs and output locations on modern chipsets in an easy to use surface mount package covering 802.11a Uni-Band II & III and the Japanese ISM band (4.9 GHz). The B4859N5050A00 is ideal for high volume manufacturing and delivers higher performance than traditional ceramic baluns. The B4859N5050A00 has an unbalanced port impedance of 50 and a 50 balanced port impedance. This transformation enables single ended signals to be applied to differential ports on modern integrated chipsets. The output ports have equal amplitude (-3dB) with 180 degree phase differential. The B4859N5050A00 is available on tape and reel for pick and place high volume manufacturing. Detailed Electrical Specifications: Specifications subject to change without notice. ROOM (25C) Parameter Min. Typ. Max Unit 5900 MHz Unbalanced Port Impedance 50 Balanced Port Impedance 50 Return Loss 16 Features: 4800 5900 MHz 0.65mm Height Profile 50 Ohm to 2 x 25 Ohm Low Insertion Loss 802.11a Uni-Band II & III Home Cordless Compliant Surface Mountable Tape & Reel Non-conductive Surface RoHS Compliant Operating Temperature -55 +85 C * Insertion Loss stated at room temperature (Insertion Loss is approximately 0.1 dB higher at +85 C) Outline Drawing Mechanical OutlineTolerances are Non-CumulativeBottom View (Far-side)Side ViewTop View (Near-side)GND / DC Feed+ RF GND43Designation Pin 121234Balanced Port.041+.003-.002 [1.05+0.08-0.06 ].041+.003 -.002 [1.05 +0.08 -0.06 ].024.0025 [0.620.064 ]Balanced Port3x.0103x.010 USA/Canada: Toll Free: Europe: (315) 432-8909 (800) 411-6596 +44 2392-232392 Available on Tape and Reel for Pick and Place Manufacturing. Model BD4859N5050A00 Rev E Typical Performance:4700 MHz. to 6000 MHz. Return Loss - Input-36-33-30-27-24-21-18-15-12-9-6-3 0 47004800490050005100520053005400550056005700580059006000Insertion Loss-3.6-3.3 -3-2.7-2.4-2.1-1.8-1.5-1.2-0.9-0.6 Specifications: Specifications sub