ULQ2003D1

Overview

The ULQ2003D1 is a high-voltage, high-current Darlington array manufactured by STMicroelectronics. It contains seven open-collector Darlington pairs with common emitters housed in a 16-pin Small Outline package (SO16). Each channel supports a continuous collector current of 500 mA and can withstand peak currents of 600 mA. The device operates with an output voltage rating of 50 V and includes integrated suppression diodes for driving inductive loads. It features TTL, CMOS, PMOS, and DTL compatible inputs, with input pins arranged opposite outputs to simplify board layout.

Feature Summary

• Seven integrated open-collector Darlington pairs within a single package
• Integrated suppression diodes designed for inductive load driving applications
• Input pins positioned opposite output pins to facilitate simplified circuit board layout

Applications

• Driving solenoids and relays
• Controlling DC motors
• Powering LED displays and filament lamps
• Operating thermal print-heads
• Functioning as high-power buffers

Procurement Notes

Verify the specific suffix D1 against official STMicroelectronics documentation to confirm it denotes the SO16 plastic small outline package variant. Ensure the component meets AEC-Q100 automotive qualification requirements if intended for automotive markets, as commercial versions may differ in temperature range or testing standards.

Selection Notes

Select this component when multiple high-current switching channels are required in a compact surface-mount footprint. The 500 mA per channel rating suits moderate power loads, while the built-in flyback diodes eliminate external components for inductive circuits. Verify that the logic family driving the inputs matches the specified TTL/CMOS compatibility levels.

Part Context

The ULQ2003D1 belongs to the ULQ200x series of Darlington arrays from STMicroelectronics. This series includes variants like the ULQ2001 and ULQ2004, which share similar internal architectures but may differ in pinout configurations or specific electrical characteristics. The D1 suffix specifically identifies the SO16 package version within this product line.

Replacement Considerations

Direct replacements include the ULQ2003ADR2G from onsemi and the ULN2003APWR from Texas Instruments. These alternatives offer identical functional specifications and pinouts, facilitating drop-in substitution in existing designs without requiring schematic modifications.