UNISONIC TECHNOLOGIES CO., LTD

L8020

Preliminary

LINEAR INTEGRATED CIRCUIT

www.unisonic.com.tw

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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 compensated to minimize drift. In

order to achieve the transient protection 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 conditions, the ambient operating

temperature is -40°C~+85°C.

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