View dtc143xe datasheet:

Transistors Digital transistors (built-in resistors) DTC143XE / DTC143XUA / DTC143XKA DTC143XSA 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-683-C143X) 426 Transistors DTC143XE/DTC143XUA/DTC143XKA/DTC143XSA FAbsolute maximum ratings (Ta = 25_C) FElectrical characteristics (Ta = 25_C) FPackaging specifications 427