This document describes the features and characteristics of the digital transistors (built-in resistors) DTC144EE / DTC144EUA / DTC144ECA / DTC144EKA / DTC144ESA from Jiangsu Changjiang Electronics Technology Co., Ltd. They have built-in bias resistors that enable the configuration of an inverter circuit without connecting external input resistors. The bias resistors consist of thin-film resistors with complete isolation to allow negative biasing of the input. They also have the advantage of almost completely eliminating parasitic effects. Only the on/off conditions need to be set for operation, making device design easy.
The DTC144 series are NPN digital transistors with integrated thin‑film bias resistors, allowing inverter circuits without external resistors. The devices provide low parasitic effects and simplify design by requiring only on/off control.
The document lists pin connections for each package variant (SOT‑523, SOT‑23‑3L, TO‑92, SOT‑323) and provides absolute maximum ratings, electrical characteristics, and typical performance curves such as input‑output voltage and current gain.
| Collector current (Ic) | 100 mA |
|---|---|
| Power dissipation (Pc) | 150‑300 mW |
| Junction temperature (Tj) | 150 °C |
| Storage temperature (Tstg) | -55 °C to 150 °C |
| Transition frequency (fT) | 250 MHz |
| Input resistance (Ri) | 32.9 kΩ – 61.1 kΩ |
The maximum collector current is 100 mA.
The transition frequency is specified as 250 MHz.