DDTA144WE-7-F

Overview

The DDTA144WE-7-F is a PNP pre-biased small signal surface mount transistor from Diodes Incorporated, housed in an SOT-523 package. It integrates internal biasing resistors with nominal values of R1 = 47 kΩ and R2 = 22 kΩ. The device supports a maximum collector current of -100 mA and a supply voltage of -50 V. Power dissipation is rated at 150 mW, with an operating temperature range spanning from -55°C to +150°C. It features a minimum DC current gain (hFE) of 56 and complies with AEC-Q101 standards for high reliability.

Feature Summary

• Integrates two distinct biasing resistors (R1 ≠ R2) within a single compact surface-mount package to simplify circuit design.
• Constructed using epitaxial planar die technology for robust performance.
• Qualified to AEC-Q101 automotive standards to ensure high reliability in demanding environments.
• Manufactured as a totally lead-free, halogen-free, and antimony-free 'Green' device compliant with RoHS directives.

Applications

• Switching applications requiring integrated base drive resistance.
• Automotive electronic systems meeting AEC-Q101 reliability requirements.
• General-purpose digital logic interfacing and level shifting.
• Power management circuits utilizing low-power PNP switching.

Procurement Notes

Verify the specific ordering suffix '-7-F' corresponds to the standard 3,000-unit reel packaging configuration. Confirm that the component meets the required AEC-Q101 qualification status if deployed in automotive contexts. Ensure the SOT-523 footprint matches the target PCB layout dimensions precisely. Check for compliance with current RoHS and REACH regulations before finalizing procurement orders.

Selection Notes

Select this component when a PNP transistor with unequal biasing resistors (47k/22k) is required. The SOT-523 package offers a smaller footprint compared to SOT-23 alternatives. Consider the 150 mW power dissipation limit and thermal resistance characteristics for heat management. Verify that the -100 mA continuous current rating aligns with the load requirements of the intended application circuit.

Part Context

This part belongs to the DDTA1x4xE series, which groups PNP pre-biased transistors by their specific resistor ratios. The 'WE' designation specifically identifies the 47 kΩ input resistor and 22 kΩ emitter resistor combination. It serves as a complementary counterpart to NPN types within the DDTC family, maintaining consistent mechanical and electrical form factors across the series.

Replacement Considerations

Direct substitutes include other DDTA144 variants with different resistor ratios, such as DDTA144VE-7-F or DDTA144VCA-7-F, provided the resistor values match the circuit design. Complementary NPN equivalents like DDTC144EE-7 are available but require polarity reversal in the schematic. Ensure any replacement maintains the SOT-523 package and AEC-Q101 qualification if automotive use is specified.

FAQ

What are the nominal values of the internal biasing resistors?

The internal biasing resistors have nominal values of R1 = 47 kΩ and R2 = 22 kΩ.

Is this component qualified for automotive applications?

Yes, the DDTA144WE-7-F is qualified to AEC-Q101 standards for high reliability.

What is the maximum power dissipation rating?

The maximum power dissipation is 150 mW when mounted on an FR4 PC board with the minimum recommended pad layout.