DTC143XUA-HF

Overview

The DTC143XUA-HF is a small signal NPN digital transistor manufactured by Comchip Technology. It integrates biasing resistors within an SOT-23 surface-mount package to simplify circuit design. The device features a maximum collector-emitter voltage (VCEO) of 50 V and a continuous collector current of 100 mA. Typical input resistance values include 1 kΩ, 2.2 kΩ, 4.7 kΩ, and 10 kΩ. The component supports a maximum operating frequency of 250 MHz with a power dissipation rating of 150 mW.

Feature Summary

• Built-in biasing resistors enable inverter circuit configuration without external input components.
• Epitaxial planar die construction ensures stable performance characteristics.
• SOT-23 molded plastic case provides compact surface-mount integration.

Applications

• General-purpose switching applications
• Inverter circuits requiring integrated biasing
• Digital logic interface buffering

Procurement Notes

Verify the specific suffix against official Comchip Technology documentation to confirm exact resistor ratios and electrical tolerances. Ensure compliance with RoHS directives as indicated by the HF designation. Confirm package dimensions match the target PCB footprint prior to procurement.

Selection Notes

Select this component for designs requiring an NPN digital transistor with a 50 V breakdown voltage. Verify that the required input resistance ratio aligns with available typical values such as 1 kΩ or 4.7 kΩ. Ensure the application operates within the 150 mW power dissipation limit and does not exceed the 100 mA collector current specification.

Part Context

This part belongs to the DTC143 series of digital transistors from Comchip Technology. These devices are designed to replace discrete resistor-transistor combinations, reducing board space and assembly complexity. The series typically includes various resistor configurations to suit different drive requirements.

Replacement Considerations

Cross-reference with standard equivalents like the DTC143XU if pinout compatibility is required. Verify that substitute parts maintain the same SOT-23 package and 50 V VCEO rating to ensure functional parity in existing designs.