View dtc123ee datasheet:

Transistors Digital transistors (built-in resistors) DTC123EE / DTC123EUA / DTC123EKA DTC123ESA FFeatures FExternal dimensions (Units: mm) 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 isola- tion 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. FEquivalent circuit (94S-653-C123E) 402 Transistors DTC123EE/DTC123EUA/DTC123EKA/DTC123ESA FAbsolute maximum ratings (Ta = 25_C) FElectrical characteristics (Ta = 25_C) FPackaging specifications 403