DTC143TUAT106

Overview

The DTA143TUAT106 is a single PNP digital transistor manufactured by ROHM Semiconductor, designed for surface-mount applications in the SOT-323-3 package. It integrates a bias resistor network with a typical input resistance of 4.7 kOhms. The device supports a collector-emitter voltage (VCEO) of -50 V and a continuous collector current of -100 mA. Key electrical characteristics include a minimum DC current gain (hFE) of 100 at -1 mA and -5 V, and a maximum operating frequency of 250 MHz. Power dissipation is rated at 200 mW, with a maximum operating temperature of +150 C. The emitter-base voltage (VEBO) is specified at -5 V.

Feature Summary

• Integrates a built-in bias resistor to simplify circuit design and reduce component count.
• Provides high-speed switching capabilities suitable for digital logic interfaces.
• Features a compact SOT-323-3 surface-mount package for space-constrained layouts.

Applications

• General-purpose digital switching circuits
• Logic level translation interfaces
• Driver stages for small-signal loads

Procurement Notes

Verify the obsolete status carefully before procurement. This component carries an NRND (Not Recommended for New Designs) lifecycle designation from ROHM Semiconductor. While existing production may continue to support legacy systems, new designs should consider alternative active parts. Confirm availability through authorized distributors as supply continuity is not guaranteed for future manufacturing cycles.

Selection Notes

Select this part only for retrofitting or maintaining existing hardware where the specific PNP configuration and -50 V rating are required. Ensure the circuit design accommodates the negative polarity inherent to PNP devices. Verify that the 4.7 kOhm internal resistance aligns with the driving source impedance requirements. Due to the NRND status, evaluate long-term supply risks against potential redesign costs.

Part Context

This component belongs to the DTA143TUA series of pre-biased transistors. It shares pinout compatibility with the DTA143TU3 variant, which remains recommended for new designs. The 'AT' suffix typically denotes specific taping and packaging configurations within the manufacturer's catalog. Understanding this family hierarchy aids in identifying functional equivalents if substitution becomes necessary due to obsolescence.

Replacement Considerations

The DTA143TU3 is a direct pin-compatible replacement within the same series that is recommended for new designs. Other NPN variants like DTC143TU3 offer similar performance but require polarity inversion in the circuit layout. Verify that any substitute maintains the 4.7 kOhm base resistance and -50 V voltage rating to ensure circuit integrity.