This document describes the features and applications of the digital transistors (with built-in resistors) DTA124XM / DTA124XE / DTA124XUA / DTA124XKA produced by ROHM. These digital transistors have built-in bias resistors, allowing the configuration of an inverter circuit without connecting external input resistors. The bias resistors consist of thin-film resistors with complete isolation, enabling positive biasing of the input and almost completely eliminating parasitic effects. Only the on/off conditions need to be set for operation, making the device design easy.
The DTA124XE is a -100 mA / -50 V digital PNP transistor with built‑in bias resistors, making it suitable for inverter, interface, and driver circuits. Its thin‑film resistors provide isolation and minimize parasitic effects, simplifying circuit design.
The datasheet lists absolute maximum ratings, electrical characteristics such as supply voltage, input voltage range, output current, power dissipation, and transition frequency, as well as packaging options and dimensions. It also includes application notes and legal notices.
| Supply voltage (V) | -50 V |
|---|---|
| Input voltage range (V) | 40 to +10 V |
| Output current (mA) | -100 mA |
| Power dissipation (mW) | 150 mW |
| Junction temperature (°C) | 150 °C |
| Transition frequency (MHz) | 250 MHz |
| Input resistance (kΩ) | 22 kΩ |
It is intended for inverter, interface, and driver applications.
The built‑in bias resistors enable inverter circuit configuration without connecting external input resistors.
The device is rated for a supply voltage of -50 V.