ULQ2004ATDRQ1

Overview

The ULQ2004ATDRQ1 is an automotive-grade Darlington transistor array manufactured by Texas Instruments. It integrates seven open-collector Darlington pairs with common emitters, designed for high-voltage and high-current switching applications. The device supports a supply voltage up to 50 V and delivers a continuous output current of 500 mA per channel, with peak currents reaching 600 mA. It operates within an extended temperature range of -40°C to 105°C and features integrated suppression diodes for inductive load driving. Packaged in a 16-SOIC format, it ensures compatibility with TTL, CMOS, PMOS, and DTL logic families.

Feature Summary

• Integrates seven independent Darlington pairs with common emitters for multi-channel control
• Includes built-in suppression diodes to protect against inductive load back-EMF
• Features input-to-output pin mapping opposite each other to simplify printed circuit board layout

Applications

• Driving solenoids and relays in automotive systems
• Controlling DC motors and thermal print-heads
• Powering LED displays and filament lamps
• Acting as high-power buffers for logic signal amplification

Procurement Notes

Verify the specific suffix 'A' and 'Q1' to confirm the automotive grade qualification and SOIC package variant. Ensure the component meets AEC-Q100 standards for the required temperature range. Cross-reference the manufacturer part number with official Texas Instruments documentation to validate authenticity and avoid counterfeit components during sourcing.

Selection Notes

Select this component when multiple high-current switching channels are required in a compact form factor. It is suitable for designs needing direct interface with standard logic families without additional driver stages. Consider the 500 mA per-channel limit and the necessity for external heat dissipation if paralleling outputs or operating near maximum thermal limits.

Part Context

This part belongs to the ULQ200x series of Darlington arrays, which are widely used for driving inductive loads. The ULQ2004 variant specifically provides seven channels, distinguishing it from the ULQ2003 which typically offers eight. The automotive qualification ensures reliability in harsh vehicle environments, making it a standard choice for body control modules and lighting applications.

Replacement Considerations

Publicly confirmed substitutes include the ULQ2003ATDRQ1 and ULQ2004D1. Verify that alternative packages maintain the same pinout configuration, particularly the opposite input-output arrangement, to ensure direct compatibility without PCB redesign.