DTA123EUAT106

Overview

The DTA123EUAT106 is a single NPN digital transistor manufactured by ROHM Semiconductor, featuring built-in bias resistors within a compact SOT-323 (UMT3) surface-mount package. It supports a collector-emitter voltage of -50V and a continuous collector current of -100mA. The device incorporates an input resistance of 2.2kΩ with a resistor ratio of 1:1. Key electrical characteristics include a minimum DC current gain (hFE) of 20 at -20mA and -5V, a maximum operating frequency of 250MHz, and a power dissipation rating of 200mW. The component is designated as Not Recommended for New Designs (NRND).

Feature Summary

• Integrates NPN bipolar junction transistor with dual bias resistors to simplify circuit design.
• Provides high-speed switching capability suitable for frequencies up to 250MHz.
• Utilizes a small footprint SOT-323 package for efficient space-constrained applications.

Applications

• General-purpose digital switching circuits in consumer electronics.
• Interface driving for microcontrollers and logic gates.
• Level shifting between different voltage domains in embedded systems.

Procurement Notes

Verify the current lifecycle status before procurement, as this part is classified as Not Recommended for New Designs. Confirm that existing inventory or last-time buy options meet project requirements. Ensure compatibility with automated pick-and-place equipment due to the SOT-323 tape-and-reel packaging format. Validate RoHS compliance documentation if required for specific regional regulations.

Selection Notes

Select this component when a pre-biased NPN solution is needed to reduce external component count. The 2.2kΩ input resistance offers a balance between drive current and noise immunity. Consider the 200mW power dissipation limit during thermal analysis. Evaluate alternative packages like SOT-23 if higher power handling is required, though pinouts may differ.

Part Context

This part belongs to the DTC/DTA series of digital transistors from ROHM Semiconductor. It serves as the NPN counterpart to the PNP DTA123EUA. The series is designed to replace discrete resistor-transistor combinations, offering cost and board space savings. The 'U' suffix typically denotes the UMT3/SOT-323 package type within ROHM's nomenclature.

Replacement Considerations

Direct substitutes with identical pinout and package include DTC123EU3T106. For legacy designs requiring PNP polarity, DTA123EU3T106 is available. Verify that any replacement maintains the 2.2kΩ input resistance and 250MHz frequency response to ensure circuit performance parity.