ULN2003ADE4

Overview

The ULN2003ADE4 is a high-voltage, high-current Darlington transistor array manufactured by Texas Instruments. It comprises seven NPN Darlington pairs with common emitters and integrated cathode clamp diodes for inductive load suppression. The device features a PDIP-16 package suitable for through-hole mounting. Key electrical parameters include a maximum continuous collector current of 500 mA per channel, a collector-emitter voltage rating of 50 V, and a collector-emitter saturation voltage of 1.1 V. The operating temperature range spans from -20°C to 70°C.

Feature Summary

• Integrates seven independent NPN Darlington pairs within a single monolithic structure
• Includes built-in cathode clamp diodes across each output to suppress inductive kickback
• Features internal base resistors allowing direct interface with TTL and 5V CMOS logic families

Applications

• Relay driver circuits
• Stepper motor control systems
• High-current lamp and LED drivers

Procurement Notes

Verify the DE4 suffix indicates lead-free compliance against the official datasheet. Confirm the package type matches the required PCB footprint. Ensure the manufacturer source is authorized to guarantee component authenticity and traceability.

Selection Notes

Select this component when driving inductive loads requiring up to 500 mA at 50 V. Verify that the logic family operates within the specified input voltage thresholds. Consider thermal dissipation requirements if multiple channels are active simultaneously.

Part Context

This part belongs to the ULN2003A series of high-voltage Darlington arrays. It shares functional similarities with other members like the ULN2003AN but may differ in environmental compliance or specific manufacturing lot characteristics defined by the suffix.

Replacement Considerations

The ULN2003AN serves as a standard equivalent. Verify pin compatibility and electrical ratings before substitution.