DTB543ZMT2L

Overview

The DTB543ZMT2L is a PNP digital transistor manufactured by ROHM Semiconductor, featuring built-in bias resistors within a VMT-3 (SOT-723) surface-mount package. It supports a collector-emitter voltage of -12V and a continuous collector current of -0.5A with a power dissipation of 0.15W. The device offers a minimum DC current gain (hFE) of 140 and operates across a storage temperature range of -55°C to 150°C. Input resistance options include 1kΩ or 4.7kΩ, paired with emitter-base resistances of 1kΩ or 47kΩ respectively. This component is designated as Not Recommended for New Designs (NRND).

Feature Summary

• Integrates thin-film bias resistors directly with the transistor die to simplify circuit design.
• Provides complete isolation between bias resistors and the transistor base to eliminate parasitic effects.
• Enables straightforward inverter configuration without requiring external input components.

Applications

• General-purpose digital logic interface circuits
• Inverter configurations for microcontroller I/O expansion
• Level shifting applications in low-voltage systems

Procurement Notes

Verify the specific suffix ZMT2L against the manufacturer's official documentation to confirm the exact resistor ratio and packaging details. Confirm that the NRND status aligns with long-term supply requirements for existing production lines before finalizing procurement plans.

Selection Notes

Select this component only for maintaining existing designs due to its NRND status. Ensure the required input resistance matches the available 1kΩ or 4.7kΩ options. Verify that the SOT-723 package dimensions fit the target PCB layout constraints.

Part Context

This part belongs to the DTB series of PNP digital transistors from ROHM Semiconductor. It shares functional similarities with other models in the family but differs in package type and specific resistor values. The VMT-3 package provides a compact footprint suitable for space-constrained applications.

Replacement Considerations

No direct public substitute part numbers are confirmed for this specific model. Designers should consult the manufacturer's cross-reference tools for potential alternatives with similar electrical characteristics and pinouts.