DTB743ZETL

Overview

The DTB743ZETL is a PNP pre-biased digital transistor manufactured by ROHM Semiconductor. It integrates a single NPN bipolar junction transistor with built-in bias resistors in an SMD/SMT SC-75 (SOT-416/EMT3) package. Key electrical specifications include a maximum collector current of 200 mA, a collector-emitter breakdown voltage of 30 V, and a typical DC current gain (hFE) of 140 at 100 mA and 2 V. The device supports a maximum operating frequency of 260 MHz with a power dissipation rating of 150 mW.

Feature Summary

• Integrates a PNP BJT with built-in bias resistors for simplified circuit design
• Provides high-speed switching capability suitable for digital applications
• Features a compact surface-mount package for space-constrained designs

Applications

• General-purpose digital switching circuits
• Interface circuits between logic gates and loads
• Driver stages for small-signal applications

Procurement Notes

Verify the specific suffix 'TL' indicates tape-and-reel packaging configuration as per manufacturer documentation. Confirm RoHS compliance status through official datasheets prior to integration. Ensure supply chain sources are authorized distributors to guarantee component authenticity and traceability. Check for obsolescence notices or recommended new design alternatives if available from the manufacturer.

Selection Notes

Select this component when a PNP pre-biased transistor is required for digital switching applications. Consider the 30 V voltage rating and 200 mA current limit against load requirements. Evaluate the 260 MHz frequency response for signal integrity needs. Compare the integrated resistor values against external biasing alternatives to assess board space and component count benefits.

Part Context

This part belongs to ROHM's series of pre-biased transistors, which combine discrete transistors with internal resistors. These devices simplify circuit design by reducing the number of external components needed for biasing. The SC-75 package offers a small footprint suitable for modern consumer electronics and industrial control systems requiring reliable digital switching.

Replacement Considerations

Public confirmed substitute part numbers are not provided in the source material. Consult official ROHM documentation for direct replacements or cross-reference guides.