DTB743ZMT2L

Overview

The DTB743ZMT2L is a PNP digital transistor from the ROHM DTB743Z series, featuring built-in bias resistors. It operates with a supply voltage of -30V and a maximum collector current of -200mA. The device incorporates thin-film resistors for complete isolation, allowing negative input biasing while eliminating parasitic effects. Key electrical parameters include an input resistance (R1) of 4.7kΩ and an emitter-base resistance (R2) of 47kΩ. It provides a DC current gain (GI) of at least 140 and a transition frequency (fT) of 260MHz. The component is housed in a VMT3 (SC-105AA) surface-mount package.

Feature Summary

• Built-in bias resistors enable inverter circuit configuration without external input resistors.
• Thin-film resistor construction allows negative input biasing and eliminates parasitic effects.
• Simplified circuit design by requiring only on/off condition settings.

Applications

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

Procurement Notes

Verify the specific ordering suffix to confirm the packaging format. The T2L suffix indicates a tape-and-reel configuration with a basic ordering unit of 8,000 pieces. Confirm RoHS compliance status and ensure the procurement channel sources directly from authorized distributors or the manufacturer to guarantee authenticity and traceability.

Selection Notes

Select this component when a PNP digital transistor with integrated biasing is required for general-purpose electronic equipment. Ensure the application voltage does not exceed the -30V supply limit and that the load current remains within the -200mA collector current rating. Verify compatibility with the VMT3 footprint during PCB layout.

Part Context

This part belongs to the DTB743Z series of PNP digital transistors manufactured by ROHM Semiconductor. It serves as the complementary counterpart to the NPN DTD743Z series. The product is designed for use in standard consumer electronics and office automation equipment rather than automotive or high-reliability safety applications.

Replacement Considerations

Direct replacements must match the PNP polarity, -30V supply voltage, and SOT-723/VMT3 package dimensions. Verify that substitute components offer equivalent R1/R2 ratios and sufficient DC current gain for the specific interface requirements.

FAQ

What is the function of the built-in resistors?

The built-in bias resistors allow the configuration of an inverter circuit without connecting external input resistors, simplifying the overall circuit design.

Can this device handle negative input biasing?

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

What is the typical DC current gain?

The DC current gain (GI) has a minimum value of 140 under conditions where VO = -2V and IO = -100mA.