DTC144WUAT106

Overview

The DTC144WUAT106 is a single NPN digital transistor manufactured by ROHM Semiconductor, housed in an SOT-323 (UMT3) surface-mount package. It integrates bias resistors with a typical input resistance of 47 kOhms and a resistor ratio of 0.47. The device supports a collector-emitter voltage of 50 V and a continuous collector current of 100 mA, with a power dissipation rating of 200 mW. Key electrical characteristics include a minimum DC current gain (hFE) of 56 at 5 mA and 5 V, a maximum operating frequency of 250 MHz, and an emitter-base voltage of 4 V. It operates within a temperature range up to +150°C.

Feature Summary

• Integrates built-in bias resistors to simplify circuit design by eliminating the need for external input components.
• Provides high-speed switching capabilities suitable for applications requiring operation up to 250 MHz.
• Offers compact surface-mount packaging to facilitate automated assembly and space-constrained layouts.

Applications

• Inverter circuits
• Interface drivers
• General-purpose switching applications

Procurement Notes

Verify the specific ordering suffix to ensure correct packaging configuration, as variations exist between reel, cut tape, and MouseReel formats. Confirm RoHS compliance status through official documentation before integration. Check for automotive qualification requirements if the application involves vehicle systems, as standard grades may not be recommended for such environments.

Selection Notes

Select this component when a single NPN digital transistor with integrated biasing is required in a small form factor. Ensure the 50 V collector-emitter voltage and 100 mA current ratings meet the load requirements. Consider the 47 kOhm input resistance value for base drive calculations. Verify that the SOT-323 package dimensions fit the PCB layout constraints.

Part Context

This part belongs to the DTC144WUA series of digital transistors from ROHM Semiconductor. It is designed as a replacement for discrete resistor-transistor networks, offering a simplified solution for switching and logic interface tasks. The UMT3 package provides a compact footprint compared to traditional through-hole or larger surface-mount alternatives.

Replacement Considerations

The DTC144EUAFRA is listed as a similar level part with the same pinout and package but is not recommended for new designs. Verify compatibility with existing board layouts when substituting.