DTA124TETL

Overview

The DTA124TETL is a PNP digital transistor manufactured by Rohm Semiconductor, featuring built-in biasing resistors to simplify circuit design. It operates with a collector-emitter voltage of -50V and a maximum collector current of -0.1A. The internal resistor configuration consists of an input resistance (R1) of 22kΩ and an emitter-base resistance (R2) of 22kΩ. Key electrical characteristics include a DC current gain (hFE) ranging from 56 to higher values and a power dissipation capacity of 0.2W. The device is housed in a compact SOT-363 surface-mount package, suitable for space-constrained applications requiring integrated switching functionality.

Feature Summary

• Integrated biasing resistors eliminate the need for external components, reducing board space and assembly complexity.
• Designed as a plug-in replacement for discrete transistor configurations, simplifying logic interface circuits.
• Surface-mount construction supports automated manufacturing processes and high-density PCB layouts.

Applications

• Logic level shifting and interface circuits between microcontrollers and peripheral devices.
• Inverter circuits for driving small loads or signaling stages.
• Switching applications in consumer electronics and industrial control systems.

Procurement Notes

Verify the specific suffix 'TETL' against official Rohm documentation to confirm tape-and-reel packaging quantities and marking codes. Ensure compatibility with existing BOM specifications regarding package dimensions and thermal requirements. Cross-reference with authorized distributors to confirm current supply status and lead times for production runs.

Selection Notes

Select this component when a PNP digital transistor with equal 22kΩ biasing resistors is required. Compare hFE ranges and power dissipation limits against load requirements. Consider the SOT-363 footprint constraints relative to available PCB real estate. Verify that the -50V rating meets the system's voltage headroom needs.

Part Context

This part belongs to Rohm's DTA series of pre-biased transistors, which integrate base and emitter resistors directly onto the silicon die. The series offers various packages and resistor combinations to replace multiple discrete components. The DTA124 variant specifically denotes the PNP polarity with standard 22kΩ/22kΩ resistor values.

Replacement Considerations

Check for direct pin-compatible alternatives such as the DTA124EUB or DTA124EU3 if package availability differs. Verify that substitute parts maintain identical R1/R2 ratios and hFE minimums to ensure circuit performance parity without redesign.