Bias Resistor Transistors SOT-23 – On Semiconductor MMUN2211LT1G, An innovative NPN digital transistor from On Semiconductor that can replace a single device and its associated external resistor bias network.The SOT-23 packaged device contains a single silicon transistor together with a monolithic bias network consisting of two resistors – a series base resistor and a base-emitter resistor. ON Semi MMUN2211LT1G B/r Transistor NPN