DTB543ZETL

Overview

The DTB543ZETL is a PNP digital transistor manufactured by ROHM Semiconductor, featuring built-in bias resistors within an SOT-416 (EMT3) surface-mount package. It operates with a collector-emitter voltage of -12 V and a continuous collector current of -500 mA. The device includes a typical input resistance of 4.7 kOhms and an emitter-base resistance of 47 kOhms. Key electrical parameters include a minimum DC current gain of 140 at -100 mA and -2 V, a maximum operating frequency of 260 MHz, and a power dissipation rating of 150 mW. The component supports a maximum operating temperature of +150 C.

Feature Summary

• Integrates a PNP bipolar junction transistor with dual internal bias resistors to simplify circuit design.
• Provides high-speed switching capabilities suitable for applications requiring frequencies up to 260 MHz.
• Offers robust current handling with a maximum collector current of 500 mA in a compact three-terminal package.

Applications

• General-purpose digital logic interface circuits
• Switching applications in consumer electronics
• Driver stages for small-signal loads

Procurement Notes

Verify the specific suffix 'ETL' against the manufacturer's official datasheet to confirm the reel packaging quantity and tape specifications. Ensure that the ordering part number matches the exact electrical characteristics required for the target application, as suffix variations may indicate different packaging or testing criteria without altering the core semiconductor function.

Selection Notes

Select this component when a PNP configuration with a 4.7 kOhm base resistor is required for digital switching. Compare the 12 V breakdown voltage and 500 mA current limit against load requirements. Consider the SOT-416 footprint constraints and thermal dissipation limits relative to the ambient operating environment and duty cycle of the intended signal processing task.

Part Context

This part belongs to the DTB543ZE series of standard digital transistors from ROHM Semiconductor. It is designed as a replacement for discrete resistor-transistor networks, offering space savings and improved consistency in mass-produced electronic assemblies. The series is widely utilized in general-purpose semiconductor applications where reliable digital switching is necessary.

Replacement Considerations

The DTB543ZM is listed as a similar level replacement with the same pinout but utilizes a VMT3 package. Verify mechanical compatibility before substitution. Other parts in the DTB543 family may share electrical specs but differ in packaging or resistance values.