DDTA144EUA-7

Overview

The DDTA144EUA-7 is a PNP pre-biased small signal surface mount transistor manufactured by Diodes Incorporated. It features an epitaxial planar die construction housed in a SOT-323 case with molded plastic material. The device integrates built-in biasing resistors where R1 equals R2, nominally set to 47 kOhms. Key electrical ratings include a supply voltage of -50 V, a continuous collector current of -100 mA, and power dissipation of 200 mW at 25°C ambient temperature. The transition frequency is typically 250 MHz, and the operating temperature range spans from -55°C to +150°C.

Feature Summary

• Epitaxial planar die construction for reliable performance
• Integrated biasing resistors with equal nominal values (R1 = R2)
• Lead-free plating with matte tin finish over alloy 42 leadframe
• Moisture sensitivity rated Level 1 per J-STD-020C

Applications

• General-purpose switching applications requiring integrated biasing
• Driver circuits for low-power loads
• Logic interface circuits converting signals between different voltage levels

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm packaging details. The standard tape and reel quantity is 3000 units. Ensure compliance with RoHS requirements and check for green molding compound specifications if halogen-free status is required for the application environment.

Selection Notes

Select this component when a single PNP transistor with integrated base and emitter resistors is needed to simplify circuit design. The 47 kOhm resistor values are suitable for standard logic interfacing. Consider the SOT-323 package size constraints and the 200 mW power dissipation limit under your specific thermal conditions.

Part Context

This part belongs to the DDTA1xxEUA series of PNP pre-biased transistors. Variants within this series differ primarily in the nominal resistance values of the integrated resistors, ranging from 2.2 kOhms to 100 kOhms. All share the same SOT-323 package and general electrical characteristics regarding voltage and current ratings.

Replacement Considerations

Complementary NPN types such as DDTC144EUA are available from the same manufacturer. Other manufacturers offer equivalent pre-biased transistors, but pinout compatibility and exact resistor tolerance must be verified before substitution.