DTA144TKAT146

Overview

The DTA144TKAT146 is a single PNP digital transistor manufactured by ROHM Semiconductor, housed in an SMT3 (SOT-346) surface-mount package. It integrates internal biasing resistors to simplify circuit design. Key electrical parameters include a maximum collector-emitter voltage of -50 V and a continuous collector current of -100 mA. The device features a typical base input resistance (R1) of 10 kΩ and an emitter-base resistance (R2) of 10 kΩ, resulting in a resistor ratio of 1. It exhibits a minimum DC current gain (hFE) of 100 at specific test conditions and supports a transition frequency up to 250 MHz. Power dissipation is rated at 200 mW, with an operating temperature range extending to +150°C.

Feature Summary

• Integrates PNP transistor with built-in base and emitter-base resistors for simplified switching applications
• Provides high-speed signal processing capabilities with a transition frequency of 250 MHz
• Offers robust thermal performance with a maximum junction temperature rating of +150°C

Applications

• Microcontroller I/O port interface circuits
• Low-voltage level shifting and logic inversion
• Driver circuits for small-signal loads such as LEDs or relay coils

Procurement Notes

Verify the exact suffix configuration against the manufacturer's latest datasheet to ensure compatibility with specific tape-and-reel packaging requirements. Confirm RoHS compliance status and lead times directly with authorized distributors prior to ordering, as availability may vary by region.

Selection Notes

Select this component when a compact PNP switching solution with integrated biasing is required. Ensure the application voltage does not exceed the -50 V collector-emitter limit. Verify that the 10 kΩ input resistance aligns with the driving source impedance to maintain proper logic levels and switching speed.

Part Context

This part belongs to the DTA144EKA series of digital transistors from ROHM. These devices are designed to replace discrete resistor-transistor combinations, reducing PCB footprint and assembly costs. The SMT3 package provides a small form factor suitable for dense consumer electronics layouts.

Replacement Considerations

Cross-reference with other ROHM PNP digital transistors in the SOT-346 package having similar R1/R2 values. Verify pinout compatibility and electrical ratings before substituting with components from other manufacturers.