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LESHAN RADIO COMPANY, LTD.Bias Resistor TransistorsLMUN2135LT1GS-LMUN2135LT1GPNP Silicon Surface Mount Transistorswith Monolithic Bias Resistor Network 3This new series of digital transistors is designed to replace a single1device and its external resistor bias network. The BRT (Bias Resistor2Transistor) contains a single transistor with a monolithic bias networkconsisting of two resistors; a series base resistor and a base-emitterSOT-23 (TO-236AB)resistor. The BRT eliminates these individual components by integratingthem into a single device. The use of a BRT can reduce both systemcost and board space. The device is housed in the SOT-23 packagePIN 3which is designed for low power surface mount applications.COLLECTOR Simplifies Circuit DesignPIN 1R1(OUTPUT) Reduces Board Space BASE(INPUT) Reduces Component CountR2PIN 2