UMA8NTR

Overview

The UMA8NTR is a dual PNP digital transistor manufactured by ROHM Semiconductor, housed in a compact SOT-353 (UMT5) surface-mount package. It integrates two PNP transistors with built-in bias resistors to simplify circuit design and reduce component count. Key electrical specifications include a collector-emitter voltage of -50V, a continuous collector current of -100mA, and a power dissipation rating of 150mW. The device features typical input resistance values of 4.7kΩ for both channels, facilitating direct interfacing with logic outputs while maintaining low standby current consumption.

Feature Summary

• Integrates dual PNP transistors with embedded base resistors within a single ultra-small footprint
• Designed for high-density mounting on printed circuit boards using surface-mount technology
• Provides simplified switching applications by eliminating external biasing components

Applications

• Differential amplifier circuits requiring matched PNP pairs
• High-frequency crystal oscillator driver stages
• General-purpose signal switching and level shifting in portable electronics

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official datasheet to confirm pinout compatibility and electrical tolerances. Ensure that the selected variant meets the required thermal dissipation standards for the intended enclosure. Cross-reference the RoHS compliance status with current regulatory requirements for the target market before finalizing procurement orders.

Selection Notes

Select this component when space constraints necessitate a dual-transistor solution in an SOT-353 package. Compare the 4.7kΩ internal resistance against load requirements to ensure adequate drive capability. Consider the -50V voltage rating relative to the maximum supply voltage in the application circuit to prevent breakdown under transient conditions.

Part Context

This part belongs to the UMA series of complex transistors from ROHM Semiconductor, which are designed as replacements for discrete resistor-transistor networks. The UMA8NTR specifically offers a dual PNP configuration, serving as a functional equivalent to paired discrete devices like the DTA143E in a more compact form factor suitable for modern miniaturized electronic assemblies.

Replacement Considerations

Public documentation identifies the DTA143T as a comparable single-part equivalent for individual channels. Verify pin-to-pin compatibility and electrical parameter alignment with the original design specifications before substituting with alternative dual-transistor packages or discrete component combinations.