DTB543EE3TL

Overview

The DTB543EE3TL is a PNP digital transistor manufactured by Rohm Semiconductor, featuring built-in bias resistors in an EMT3 (SOT-416) surface-mount package. It operates with a supply voltage of 12V and supports a collector current of -0.5A. The device includes internal resistors R1 and R2, both valued at 4.7kΩ, configured for potential divider applications. Key electrical specifications include a DC current gain (hFE) ranging from 115 to 260 MHz transition frequency, power dissipation of 0.15W, and a collector-emitter saturation voltage of 300mV at specified test conditions.

Feature Summary

• Integrates dual bias resistors to simplify circuit design by eliminating external input components.
• Provides standardized logic interface capabilities through pre-configured resistor ratios.
• Utilizes compact SOT-416 packaging suitable for high-density surface mount applications.

Applications

• General-purpose inverter circuits requiring simplified biasing networks.
• Logic level translation between microcontrollers and peripheral devices.
• Switching applications in consumer electronics and industrial control systems.

Procurement Notes

Verify the specific ordering suffix against the manufacturer's latest datasheet to ensure correct packaging configuration. Confirm RoHS compliance status and long-term availability plans prior to finalizing procurement decisions. Cross-reference part markings with official documentation to prevent counterfeit component risks during assembly.

Selection Notes

Select this component when a PNP digital transistor with 4.7kΩ internal bias resistors is required. Ensure the application voltage does not exceed the 12V rating and that the load current remains within the 0.5A limit. Consider thermal management requirements given the 0.15W power dissipation capability in the small outline package.

Part Context

This component belongs to Rohm's standard digital transistor series designed for replacing discrete resistor-transistor combinations. It serves as a direct replacement for legacy discrete designs while reducing board space and assembly complexity. The EMT3 package variant offers a compact footprint compared to traditional through-hole alternatives.

Replacement Considerations

Direct pin-compatible substitutes may include other PNP digital transistors with identical 4.7kΩ resistor values and similar voltage/current ratings. Verify electrical parameters such as hFE and Vce(sat) match original design requirements before substitution.

FAQ

What is the function of the internal resistors in the DTB543EE3TL?

The internal resistors R1 and R2 are connected in a potential divider configuration to provide base biasing, allowing the transistor to switch on/off directly with logic signals without external resistors.

What is the maximum collector current for this device?

The maximum collector current (Ic) is rated at -0.5A, indicating it can handle up to 500mA of reverse current flow for PNP operation.

Which package type does the DTB543EE3TL use?

It utilizes the EMT3 package, which corresponds to the SOT-416 form factor, designed for surface mount technology.