DTA115EKAT146

Overview

The DTA115EKAT146 is a single PNP digital transistor manufactured by ROHM Semiconductor, designed for surface-mount applications. It integrates bias resistors within an SMT3 (SOT-346) package to simplify circuit design. Key electrical parameters include a collector-emitter voltage of 50 V and a continuous collector current of 20 mA. The device features built-in base resistor R1 and emitter-base resistor R2, both typically valued at 100 kOhms with a resistance ratio of 1. It offers a minimum DC current gain (hFE) of 82 at -5 mA and -5 V, with a maximum operating frequency of 250 MHz. Power dissipation is rated at 200 mW, and the saturation voltage is 100 mV.

Feature Summary

• Integrates dual bias resistors (R1 and R2) to eliminate external components
• Provides simplified inverter circuit configuration via internal pre-biasing
• Optimized for low-power switching and signal driving applications

Applications

• Microcontroller I/O port interface circuits
• Digital signal level shifting and logic inversion
• Low-current switching control in portable devices

Procurement Notes

Verify component authenticity through authorized distribution channels. Confirm RoHS compliance status using official manufacturer documentation. Ensure storage conditions adhere to specified humidity sensitivity levels. Validate package marking against datasheet specifications to prevent counterfeit substitution during assembly.

Selection Notes

Select this component for designs requiring compact PNP switching with integrated biasing. The 100 kOhm resistor values suit standard logic interfaces. Consider thermal constraints due to 200 mW power dissipation rating. Verify compatibility with target PCB footprint dimensions for the SMT3 package before finalizing schematic.

Part Context

This part belongs to the DTA115EKA series of digital transistors from ROHM. It serves as the PNP counterpart to NPN variants like the DTC115EKAT146. The series is characterized by standardized internal resistor ratios and small form-factor packaging suitable for high-density board layouts.

Replacement Considerations

Direct substitutes include other ROHM PNP digital transistors with identical 100 kOhm resistor ratios and SMT3 packaging, such as DTA115EKT146 if available. Cross-manufacturer replacements require matching VCEO, IC, and hFE specifications.