DTB143ECT116

Overview

The DTB143ECT116 is a PNP digital transistor manufactured by ROHM Semiconductor, featuring built-in bias resistors to simplify circuit design. It operates with a collector-emitter voltage of -50 V and a continuous collector current of -500 mA. The device includes an internal base resistor (R1) of 4.7 kOhms and an emitter-base resistor (R2) of 4.7 kOhms, resulting in a typical resistance ratio of 1. Packaged in an SOT-23-3 (SST3) surface-mount format, it supports a maximum power dissipation of 200 mW and functions within a temperature range of -55°C to +150°C.

Feature Summary

• Integrates dual bias resistors to eliminate external components for inverter circuits
• Provides high-speed switching capability suitable for digital logic applications
• Offers low saturation voltage for efficient power handling

Applications

• Digital inverter circuits
• Logic level shifting interfaces
• Switching applications in portable devices

Procurement Notes

Verify the specific suffix 'T116' to confirm the tape-and-reel packaging quantity of 3000 units per reel. Ensure compatibility with SOT-23-3 footprint requirements during PCB layout. Confirm RoHS compliance status through official manufacturer documentation prior to integration into regulated products.

Selection Notes

Select this component when a PNP configuration with integrated biasing is required for space-constrained designs. The 4.7 kOhm input resistance provides a standard drive interface. Consider the -500 mA current limit and 200 mW thermal dissipation constraints for load management. Verify that the SOT-23-3 package dimensions fit the designated board area.

Part Context

This part belongs to the ROHM DTx series of digital transistors, which combine bipolar junction transistors with on-chip resistors. The DTB prefix indicates a PNP polarity variant within this family. The T116 suffix specifically denotes the SOT-23-3 package type and the associated taping specifications for automated assembly processes.

Replacement Considerations

Cross-reference with DTC143ECAT116 only if NPN polarity is acceptable and circuit topology allows inversion. Verify pinout compatibility between SOT-23 variants before substitution. Electrical parameters such as hFE and saturation voltage differ significantly between PNP and NPN types.