RN Series Single Digital TransistorsSingle digital transistors from Toshiba with integrated biasing resistors allowing direct drive from digital sources. Both NPN and PNP types are available.Digital Transistors, ToshibaResistor-equipped bipolar transistors, also known as “Digital Transistors” or “Bias Resistor Transistors”, incorporating one or two integrated resistors. A single series input resistor, or a potential divider of two resistors, allows these devices to be directly driven from digital sources. Both single and dual transistor versions are available.