DTD543EETL

Overview

The DTD543EETL is a single NPN digital transistor manufactured by ROHM Semiconductor, housed in an SOT-416 (EMT3) surface-mount package. It integrates built-in bias resistors with a typical input resistance of 4.7 kOhms and a resistor ratio of 1. Key electrical parameters include a maximum collector-emitter voltage of 300 mV, a continuous collector current of 500 mA, and a power dissipation rating of 150 mW. The device features a minimum DC current gain (hfe) of 115 at 100 mA and 2 V, with a maximum operating frequency of 260 MHz. It operates within a temperature range up to +150°C.

Feature Summary

• Integrates NPN bipolar junction transistor with built-in bias resistors for simplified circuit design
• Optimized for high-speed switching applications with a transition frequency of 260 MHz
• Compact SOT-416 surface-mount package suitable for space-constrained PCB layouts

Applications

• General-purpose switching circuits in consumer electronics
• Driver stages for logic interfaces requiring pre-biased transistors
• Signal processing circuits utilizing low-voltage operation

Procurement Notes

Verify the specific ordering suffix to ensure compatibility with required packaging formats such as cut tape or reel quantities. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Cross-reference the component marking with the datasheet to authenticate the source and prevent counterfeit components during procurement.

Selection Notes

Select this component when a single NPN digital transistor with integrated 4.7 kOhm base resistance is required. Ensure the application voltage does not exceed the 300 mV collector-emitter limit and that the load current remains within the 500 mA continuous rating. Consider the SOT-416 footprint constraints and thermal dissipation capabilities relative to the 150 mW power rating.

Part Context

This part belongs to the DTD543EE series of digital transistors from ROHM Semiconductor. It is specifically designed as an NPN type with built-in resistors, distinguishing it from PNP variants like the DTB543EETL or other resistance configurations within the same family. The EMT3 package designation corresponds to the SOT-416 standard.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify pinout compatibility and electrical specifications before considering any alternative components from different manufacturers.