DTA144WU3T106

Overview

The DTA144WU3T106 is a PNP digital transistor manufactured by ROHM Semiconductor, featuring built-in bias resistors in an SOT-323 (UMT3) surface-mount package. It operates with a collector-emitter voltage of -50 V and a continuous collector current of -100 mA. The device includes a typical input resistor (R1) of 47 kOhms and an emitter-base resistor (R2) of 22 kOhms, yielding a resistance ratio of approximately 0.47. Key electrical characteristics include a minimum DC current gain (hFE) of 100 at -1 mA and -5 V, a maximum operating frequency of 250 MHz, and a power dissipation rating of 200 mW. The component supports a maximum operating temperature of +150°C and complies with RoHS standards.

Feature Summary

• Integrates thin-film bias resistors for complete isolation, enabling negative input biasing without parasitic effects.
• Simplifies circuit design by allowing inverter configuration without external input resistors.
• Provides defined on/off switching conditions to streamline operational setup.

Applications

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

Procurement Notes

Verify the specific suffix 'T106' against the manufacturer's official documentation to confirm reel packaging specifications and tape-and-reel dimensions. Ensure compatibility with standard SMT assembly processes for the SOT-323 footprint. Confirm that the application environment remains within the specified thermal limits and does not require automotive-grade certification, as this is a standard-grade component.

Selection Notes

Select this PNP variant when a complementary NPN type, such as the DTC144W series, is required for differential signaling or push-pull configurations. The 47 kOhm input resistance is suitable for direct interfacing with standard logic outputs. Consider the SOT-323 package size constraints and the 200 mW power dissipation limit when designing for high-density PCB layouts or elevated ambient temperatures.

Part Context

This component belongs to the DTA144W series of digital transistors from ROHM Semiconductor. The series is characterized by the integration of bias resistors into a single compact package, replacing discrete resistor-transistor networks. The 'U' in the model number denotes the UMT3 (SOT-323) package style, distinguishing it from other form factors like SOT-416 or SOT-346 available within the same electrical family.

Replacement Considerations

The complementary NPN equivalent is the DTC144WU3T106. Other packages in the DTA144W series, such as DTA144WE or DTA144WK, offer identical electrical performance but differ in physical footprint and pinout orientation.