UMC4N-TP

Overview

The UMC4N-TP is a dual digital transistor manufactured by Micro Commercial Components (MCC), featuring one NPN and one PNP pre-biased transistor array in a surface-mount SOT-353 package. It supports a maximum collector-emitter voltage of 50V and a continuous collector current of 100mA, with a power dissipation rating of 150mW. The device includes integrated base resistors of 47kΩ and 10kΩ for the NPN section, and a 47kΩ resistor for the PNP section. Key electrical characteristics include a DC current gain (hFE) of at least 68 at 5mA/5V, a saturation voltage of 300mV max at 500µA/10mA, and a transition frequency of 250MHz.

Feature Summary

• Integrates complementary NPN and PNP transistors into a single compact unit to reduce component count and PCB space.
• Includes built-in biasing resistors to simplify circuit design and eliminate external resistor requirements.
• Optimized for high-speed switching applications with a transition frequency of 250MHz.

Applications

• Signal switching and level shifting in digital logic circuits
• Driver stages for small-signal loads in consumer electronics
• Interface circuits between microcontrollers and peripheral devices

Procurement Notes

This component is officially discontinued as per the EOL notification dated March 31, 2021. Verification of availability should focus on surplus or secondary market sources rather than direct manufacturer distribution. Buyers must confirm the specific lot date code and physical condition when sourcing from non-primary suppliers due to the end-of-life status.

Selection Notes

Designers requiring this specific dual configuration should verify pin compatibility with existing layouts before substituting. The SOT-353 package limits thermal dissipation to 150mW, necessitating adequate copper area for heat spreading if operating near maximum ratings. Ensure that the integrated resistor values (47kΩ/10kΩ) align with the target drive current and logic voltage levels of the application.

Part Context

The UMC4N-TP belongs to the UMC4 series of dual digital transistors from MCC. This series typically combines NPN and PNP elements in low-profile packages like SOT-353 to provide cost-effective solutions for signal inversion and buffering. The part is categorized under bipolar junction transistor arrays with pre-biasing, distinct from standard discrete transistors or MOSFETs.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Due to the discontinued status, engineers should evaluate alternative dual digital transistors from other manufacturers that offer compatible pinouts, voltage/current ratings, and package dimensions.