This document introduces the ROHM's digital transistor product series DTC124XM / DTC124XE / DTC124XUA / DTC124XKA. This product series features built-in resistors and is suitable for inverter, interface, and driver applications. The features of this product include built-in bias resistors, allowing the configuration of an inverter circuit without external input resistors; the bias resistors are made of thin-film resistors with complete isolation, allowing negative biasing of the input and almost completely eliminating parasitic effects; only on/off conditions need to be set for operation, making the device design easy.
The DTC124 series are NPN epitaxial planar silicon digital transistors that incorporate thin‑film bias resistors. The built‑in resistors allow inverter circuits to be configured without external components and minimize parasitic effects.
The datasheet lists absolute maximum ratings, electrical characteristics, package types (EMT3, VMT3, UMT3, SMT3) and typical application examples such as inverters, interfaces and drivers. It also includes dimensional drawings and ordering information.
| Supply voltage (VCC) | 50 V |
|---|---|
| Input voltage range | -10 V to +40 V |
| Output current (Ic max) | 100 mA |
| Power dissipation | 150 mW (typ) – 200 mW (max) |
| Junction temperature (Tj) | 150 °C |
| Transition frequency (fT) | 250 MHz |
The maximum supply voltage (VCC) is 50 V.
They enable inverter circuit configuration without external resistors and greatly reduce parasitic effects.
The devices are offered in EMT3, VMT3, UMT3 and SMT3 surface‑mount packages.