DDTC122LU-7-F

Overview

The DDTC122LU-7-F is an obsolete NPN pre-biased surface mount transistor manufactured by Diodes Incorporated. It features built-in biasing resistors with nominal values of R1 = 0.22 kΩ and R2 = 10 kΩ. The device is housed in a SOT-323 package and supports a maximum collector-emitter voltage (BVCEO) of 40 V and a continuous collector current of 100 mA. Power dissipation is rated at 200 mW, with an operating temperature range from -55°C to +150°C. The component utilizes epitaxial planar die construction and is fully RoHS compliant.

Feature Summary

• Integrated dual biasing resistors simplify circuit design by reducing external component count.
• Epitaxial planar die construction ensures stable performance characteristics.
• Compliant with environmental standards including RoHS and halogen-free requirements.

Applications

• General-purpose switching applications
• Driver circuits for low-power loads
• Logic level translation interfaces

Procurement Notes

This component is officially marked as obsolete and discontinued by the manufacturer. Verification of availability should focus on surplus or secondary market sources rather than direct production channels. Engineering teams must initiate replacement strategies immediately due to the confirmed end-of-life status. Validate any acquired units against original datasheet specifications to ensure compatibility with existing designs.

Selection Notes

Designers should identify equivalent active components that match the required electrical parameters, specifically the 40V breakdown voltage and 100mA current rating. Verify that alternative devices offer compatible resistor ratios if the internal biasing network is critical to the application. Package footprint compatibility with the SOT-323 form factor should be prioritized to minimize board layout changes during migration.

Part Context

The DDTC122LU-7-F belongs to the DDTC series of NPN pre-biased transistors produced by Diodes Incorporated. This series integrates specific resistor networks directly onto the silicon die to facilitate easy interfacing with digital logic outputs. The 'LU' suffix denotes the specific resistance configuration within this product family.

Replacement Considerations

Direct substitutes include DDC122LU-7-F and DCX122LU-7-F. These parts share similar configurations but may differ in polarity or voltage ratings. Verify pinout compatibility and electrical limits before substitution.

FAQ

What are the nominal values of the built-in resistors?

The typical input resistor R1 is 0.22 kΩ, and the emitter resistor R2 is 10 kΩ.

What is the maximum power dissipation rating?

The maximum power dissipation is 200 mW at an ambient temperature of 25°C.

Is this component suitable for automotive applications?

Standard versions are not qualified for automotive use. Automotive-grade parts require specific AEC-Q100 qualification and IATF 16949 manufacturing certification.