DTD743XETL

Overview

The DTD743XETL is an NPN digital transistor from the ROHM DTD743X series, featuring built-in bias resistors within a compact EMT3 (SOT-416) surface-mount package. It supports a maximum collector current of 200 mA and a supply voltage of 30 V. The device incorporates thin-film resistors with R1 at 4.7 kΩ and R2 at 10 kΩ, providing a resistance ratio of approximately 2.1. Key electrical characteristics include a DC current gain of 140 at 100 mA output, a transition frequency of 260 MHz, and a power dissipation rating of 150 mW.

Feature Summary

• Built-in biasing resistors enable inverter circuit configuration without external input resistors.
• Thin-film resistors provide complete isolation to allow negative input biasing and eliminate parasitic effects.
• Simplified circuit design by requiring only on/off condition settings for operation.

Applications

• Switching circuits
• Inverter circuits
• Interface circuits
• Driver circuits

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and check for obsolescence notices, as the product may be designated for non-new designs. Ensure packaging specifications match project requirements before procurement.

Selection Notes

Select this component for applications requiring compact NPN switching with integrated biasing. Verify that the 30 V supply voltage and 200 mA current limits accommodate system demands. Consider the EMT3 package dimensions for PCB layout constraints and ensure thermal management aligns with the 150 mW power dissipation rating.

Part Context

This part belongs to the ROHM DTD743X series of NPN digital transistors. It is functionally complementary to the DTB743X series PNP types. The device is designed for general-use electronic equipment, including audio-visual, office automation, and communication devices, but is not intended for automotive or high-reliability safety applications.

Replacement Considerations

DTC143XE3TL is listed as a substitute option by distributors.

FAQ

What is the internal structure of the bias resistors?

The bias resistors consist of thin-film resistors with complete isolation to the transistor, allowing for negative biasing of the input and eliminating parasitic effects.

Can this component be used for negative input biasing?

Yes, the isolated thin-film resistor structure allows for negative biasing of the input terminal.

Is this component suitable for automotive applications?

No, ROHM specifies that this product is not designed for use in automotive equipment or systems requiring extremely high reliability.