1) Built-In bias resistors enable the configuration of an inverter circuit without connecting external input resistors (see inner circuit). 2) The bias resistors consist of thin-film resistors with complete isolation to allow negative biasing off the input. They also have the advabtages if completely eliminating parasitic effects. 3) Only the on/off conditions need to be set for operation, making the circuit design easy. 4) Complementary NPN Type: DTC013Z series. 6) Lead Free/RoHS Compliant.