DDTA144WUA-7-F

Overview

The DDTA144WUA-7-F is a PNP pre-biased small signal surface mount transistor from Diodes Incorporated, housed in an SOT-323 package. It features built-in biasing resistors with nominal values of R1 = 47 kΩ and R2 = 47 kΩ. The device supports a maximum supply voltage (VCC) of -50 V and a continuous collector current (IC) of -100 mA. Power dissipation is rated at 200 mW, with a thermal resistance (RθJA) of 625 °C/W. Operating and storage temperatures range from -55°C to +150°C. The component utilizes epitaxial planar die construction and is lead-free/RoHS compliant.

Feature Summary

• Integrates two internal biasing resistors (R1≠R2 series) to reduce printed circuit board space and simplify circuit design.
• Constructed using epitaxial planar die technology for reliable performance in surface mount applications.
• Manufactured with green molding compound and matte tin finish plating over an alloy 42 leadframe.

Applications

• General-purpose switching circuits requiring compact footprint solutions.
• Driver stages for logic interfaces where base current limiting is required.
• Low-power analog signal processing applications within specified temperature ranges.

Procurement Notes

Verify the specific ordering suffix against manufacturer documentation to confirm packaging details. Ensure that the requested quantity aligns with standard shipping configurations such as tape and reel counts. Confirm compliance requirements including RoHS status and moisture sensitivity levels prior to integration into final assemblies.

Selection Notes

Select this component when a PNP configuration with unequal or specific resistor ratios is needed in a minimal footprint. Compare electrical characteristics such as DC current gain and saturation voltage against alternative NPN types if polarity inversion is possible. Verify that the input voltage limits accommodate the specific logic levels used in the target application circuit.

Part Context

This part belongs to the DDTA144 series of pre-biased transistors from Diodes Incorporated. It serves as the PNP counterpart to the DDTC144 series NPN devices. The 'UA' designation indicates the SOT-323 package style. This family is designed to replace discrete resistor-transistor networks in digital switching applications.

Replacement Considerations

Direct functional equivalents include other PNP pre-biased transistors with similar resistor values and SOT-323 packaging. Verify pinout compatibility and electrical ratings before substitution. Cross-reference with DDTA144WCA or DDTA144WGE variants if different package styles are acceptable.