DDTC144WKA-7-F

Overview

The DDTC144WKA-7-F is a pre-biased NPN digital transistor manufactured by Diodes Incorporated. It integrates a single NPN bipolar junction transistor with built-in bias resistors in an SC-59 (SOT-323) surface-mount package. The device features a collector-emitter voltage of 50 V and a continuous collector current of 100 mA, with a power dissipation rating of 200 mW. The internal resistor network consists of a base resistor (R1) of 47 kΩ and an emitter resistor (R2) of 22 kΩ, resulting in a typical resistance ratio of approximately 2.14. The minimum DC current gain (hFE) is specified at 56.

Feature Summary

• Integrates NPN transistor with dual bias resistors to reduce component count and PCB area
• Provides consistent switching performance through fixed internal resistance ratios
• Designed for high-density surface-mount applications with compact packaging

Applications

• General-purpose switching circuits
• Driver stages for logic interfaces
• Level shifting between different voltage domains

Procurement Notes

Verify the specific suffix 'WKA' against the manufacturer's latest datasheet to confirm pinout orientation and resistor values, as variations exist within the DDTC144 family. Confirm RoHS compliance status and lead-free designation directly from the production documentation. Check for End-of-Life notices or obsolescence warnings prior to final design approval.

Selection Notes

Select this component when a single NPN switch with integrated biasing is required in an SC-59 package. Ensure the 47k/22k resistor combination matches the input drive requirements. Verify that the 50V VCEO and 100mA IC ratings exceed the maximum circuit operating conditions. Compare against other DDTC144 variants if different resistor ratios or package types are needed.

Part Context

This part belongs to the DDTC144 series of pre-biased transistors from Diodes Incorporated. The series offers various configurations of NPN and PNP devices with different internal resistor values and packages. The DDTC144WKA-7-F specifically denotes the NPN type with 47k/22k resistors in the SC-59 footprint, distinguishing it from other suffixes like WCA or TKA which may have different electrical characteristics or pinouts.