unisonic technologies co., ltd l8020 preliminary linear integrated circuit www.unisonic.com.tw 1 of 4 copyright ? 2009 unisonic technologies co., ltd qw-r123-015.a dual polarisation switch twin lnb multiplex controller ? description the utc l8020 dual polarisation switch controller is one of a wide range of satellite receiver lnb support circuits. its features include completely independent channels, and every channel provides two logic outputs under the voltage sensitive input. the two inputs of the utc l8020 have a nominal threshold of 14.5v. their threshold is temperature co mpensated to mini mize drift. in order to achieve the transient pr otection by adding only a single resistor per channel, each input has a low and stable input current. normal and inverted outputs are provided for each input. all outputs can source 15ma and sink 10ma making them suitable to drive ttl and cmos logic, pin diodes and for if-amp supply switching. the utc l8020 works in a single supply ranging from 5v to12v. the quiescent current of the utc l8020 is 4ma, and there is no remarkable change with load or logic state. in order to adapt the variation of environmental c onditions, the ambient operating temperature is -40c~+85c. the utc l8020 can be used in applications, such as if switch box, lnb switch boxes and twin lnbs, replacing many discrete components to save both manufacturing cost and pcb size as well as improving reliability. ? features * avoid external components * provides polarity detection and control * transient resistant * low input and supply current * temperature compensated input threshold * normal and inverted output available while wide supply operating range * dual polarisation switch * simplify the design * halogen free ? ordering information ordering number package packing L8020G-S08-R sop-8 tape reel
l8020 preliminary linear integrated circuit unisonic technologies co., ltd 2 of 4 www.unisonic.com.tw qw-r123-015.a ? pin configuration 1 v cc hor 2 vert 1 hor 1 vert 2 v p 1 v p 2 gnd 2 3 4 5 6 7 8 ? pin description pin no. pin name description 1 vert1 vertical output 1 2 hor1 horizontal output 1 3 vert2 vertical output 2 4 hor2 horizontal output 2 5 gnd ground connection pin. 6 v p 2 polarity select input 2 7 v p 1 polarity select input 1 8 v cc supply voltage
l8020 preliminary linear integrated circuit unisonic technologies co., ltd 3 of 4 www.unisonic.com.tw qw-r123-015.a ? absolute maximum rating parameter symbol ratings unit supply voltage v cc -0.6~+15 v input voltage (v pol1 and v pol2 ) v in 25 v supply current i cc 50 ma power dissipation (ta=25c) p d 500 mw operating temperature t opr -40~+85 c storage temperature t stg -40~+85 c note: absolute maximum ratings are those values be yond which the device coul d be permanently damaged. absolute maximum ratings are stress ratings only and functional device oper ation is not implied. ? electrical characteristics (ta= 25c, v cc =5v, i d =10ma (r cal1 =33k ? ), unless otherwise specified) parameter symbol test conditions min typ max unit supply voltage v cc 5 12 v all inputs and outputs open circuit 10 ma i vert1 =i vert2 =10ma, v pol1 =v pol2 =14v 30 ma supply current i cc i hor1 =i hor2 =10ma, v pol1 =v pol2 =15.0v 30 ma v pol1 and v pol2 inputs current i pol v pol1 =v pol2 =25v (note 1) 10 20 40 a threshold voltage v tpol (note 1) (note 2) 14.0 14.5 15.0 switching speed t spol 100 s vert 1/2 outputs i vert1 =i vert2 =10ma, v pol1 =v pol2 =14v v cc -1.0 v cc -0.8 v cc v i vert1 =i vert2 =15ma, v pol1 =v pol2 =14v v cc -1.2 v cc -0.9 v cc v voltage high v vh i vert1 =i vert2 =10a, v pol1 =v pol2 =14v v cc -0.2 v cc -0.1 v cc v voltage low v vl i vert1 =i vert2 =-10ma, v pol1 =v pol2 =15.0v 0 0.25 0.5 v hor 1/2 outputs i hor1 =i hor2 =10ma, v pol1 =v pol2 =15.0v v cc -1.0 v cc -0.8 v cc v i hor1 =i hor2 =15ma, v pol1 =v pol2 =15.0v v cc -1.2 v cc -0.9 v cc v voltage high v vh i hor1 =i hor2 =10a, v pol1 =v pol2 =15.0v v cc -0.2 v cc -0.1 v cc v voltage low v vlow i hor1 =i hor2 =-10ma, v pol1 =v pol2 =14v 0 0.25 0.5 v notes: 1. v pol1 and v pol2 switching thresholds apply over the whole operating temperature range specified above. 2. applied via 10k resistors
l8020 preliminary linear integrated circuit unisonic technologies co., ltd 4 of 4 www.unisonic.com.tw qw-r123-015.a ? typical application circuit a twin lnb design is as followed. in this block diagram, the utc l8020 provides the two polarity switches required to decode the two independent receiver feeds. pin diode mux control x x bias generator series horizontal antenna gain stage gaas/hemtfet vertical antenna gain stage gaas/hemtfet l8020 series dual h/v switch vertical horizontal mixer mixer 1 3 4 2 h/v output 1 h/v output 2 dc input 13-25v control input <=14v-horizontal >=15v-vertical local osc utc assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all utc products described or contained herein. utc products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. the information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice.
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