DTD743ZMT2L

Overview

The DTD743ZMT2L is an NPN digital transistor with built-in bias resistors, manufactured by ROHM Semiconductor. It operates with a supply voltage (VCC) of up to 30 V and supports a maximum collector current (IC) of 200 mA. The device features an input resistance (R1) of 4.7 kΩ and an emitter-base resistance (R2) of 47 kΩ. Key electrical characteristics include a DC current gain (GI) of at least 140 at 100 mA, a transition frequency (fT) of 260 MHz, and a power dissipation (PD) of 150 mW. It is housed in the VMT3 (SOT-723) surface-mount package.

Feature Summary

• Built-in thin-film bias resistors enable direct inverter circuit configuration without external input components.
• Complete isolation of internal resistors allows for negative input biasing while eliminating parasitic effects.
• Simplified circuit design through defined on/off operating conditions.

Applications

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

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm the exact package type and reel specifications. Confirm RoHS compliance status and ensure the component meets the required automotive or industrial reliability standards if applicable to the target application environment.

Selection Notes

Select this component when a compact NPN solution with integrated biasing is required for high-speed switching applications. Ensure the design accommodates the 30 V supply limit and 200 mA current capability. Consider the complementary DTB743Z series for PNP requirements within the same footprint constraints.

Part Context

This part belongs to the DTD743Z series of NPN digital transistors from ROHM. It is designed as a standard-level product for general-purpose electronic equipment, including audio-visual, office automation, and communication devices. It is not intended for radiation-tolerant or high-reliability safety-critical systems.

Replacement Considerations

The DTB743Z series serves as the complementary PNP type within the same family. Verify pinout compatibility and electrical ratings before substituting with other SOT-723 digital transistors from different manufacturers.

FAQ

What is the typical resistance ratio between R2 and R1?

The typical resistance ratio (R2/R1) is 10, with R1 being 4.7 kΩ and R2 being 47 kΩ.

Can this device handle negative input biasing?

Yes, the bias resistors consist of thin-film resistors with complete isolation, allowing for negative biasing of the input.

What is the maximum junction temperature?

The maximum junction temperature (Tj) is 150 °C.