Structure
NPN digital transistor (Built-in resistors)

Features
1) Built-in bias resistors enable the configuration of an inverter circuit without connecting external input resistors (see equivalent circuit).
2) The bias resistors consist of thin film resistors with complete isolation to allow negative biasing of the input. They also have the advan tage of almost completely eliminat ing parasitic effects.
3) Only the on/off conditions need to be set for operation, making device design easy.