DTD543EMT2L

Overview

The DTD543EMT2L is an NPN digital transistor manufactured by ROHM Semiconductor, designed for use in digital circuits. It integrates biasing resistors to simplify circuit design. The device features a collector-emitter voltage (VCEO) of 50 V and a continuous collector current (Ic) of 100 mA. Typical input resistance (R1) is 4.7 kΩ, with emitter-base resistance (R2) also at 4.7 kΩ. Power dissipation is rated at 150 mW. It operates within a temperature range of -55°C to +150°C and is housed in a compact SOT-723 (SC-105AA) surface-mount package.

Feature Summary

• Integrates built-in biasing resistors to enable inverter circuit configuration without external input components.
• Simplifies circuit design by requiring only on/off condition settings for operation.
• Provides high-density mounting through a small SOT-723 surface-mount package.

Applications

• Digital logic interface circuits
• Inverter circuits
• General-purpose switching applications

Procurement Notes

Verify the specific suffix 'T2L' against the manufacturer's datasheet to confirm tape-and-reel packaging details and marking codes. Ensure compatibility with standard SMT reflow profiles for the SOT-723 package. Confirm RoHS compliance status as indicated in the official documentation before integration into regulated assemblies.

Selection Notes

Select this component when an NPN digital transistor with 50 V rating and 100 mA current capacity is required. The integrated 4.7 kΩ resistor ratio suits standard logic level driving. Consider thermal management for the 150 mW power dissipation limit in enclosed designs. Verify that the SOT-723 footprint matches the PCB layout constraints.

Part Context

This part belongs to the DTD543 series of NPN digital transistors from ROHM Semiconductor. It is categorized as a standard-grade product intended for general electronic equipment rather than automotive applications. The series offers complementary PNP types, such as the DTA543E series, for balanced design requirements.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Cross-reference with other NPN digital transistors featuring similar 50 V, 100 mA specifications and SOT-723 packaging if substitution is necessary.