ULQ2001A

Overview

The ULQ2001A is a high-voltage, high-current Darlington array manufactured by STMicroelectronics. It contains seven open-collector Darlington pairs with common emitters within a single package. Each channel is rated for an output current of 500 mA and can withstand peak currents of 600 mA. The device supports an output voltage of 50 V and features integrated suppression diodes for inductive load driving. Inputs are pinned opposite outputs to simplify board layout. It interfaces with TTL, CMOS, PMOS, and DTL logic families. The component is supplied in a 16-pin plastic DIP package with a copper lead-frame to reduce thermal resistance.

Feature Summary

• Seven Darlington pairs per package
• Integrated suppression diodes for inductive loads
• TTL/CMOS/PMOS/DTL compatible inputs
• Inputs pinned opposite outputs to simplify layout

Applications

• Driving solenoids
• Driving relays
• Driving DC motors
• LED displays
• Thermal print-heads

Procurement Notes

Verify the specific manufacturer source when sourcing this component, as multiple vendors distribute STMicroelectronics products. Confirm the package type matches design requirements, typically 16-pin DIP or SO16 variants depending on availability. Ensure the version aligns with intended operating temperature ranges and automotive qualification needs if applicable to the system design.

Selection Notes

Select the ULQ2001A for applications requiring multiple high-current switching channels driven by standard logic levels. Consider the parallel output capability if higher current than 500 mA per channel is needed. Evaluate thermal management requirements due to the copper lead-frame construction. Verify compatibility with the input logic family used in the control circuitry before finalizing the design.

Part Context

The ULQ2001A belongs to the ULQ200x series of Darlington arrays from STMicroelectronics. This series includes similar devices like the ULQ2003 and ULQ2004, which share core architectural features but may differ in pinout configurations or specific packaging options. The series is designed for versatile load driving tasks in embedded systems and industrial control environments.

Replacement Considerations

Compatible substitutes include other ULQ2001A variants from different manufacturers or equivalent Darlington arrays such as the ULN2001A. Verify pin compatibility and electrical ratings before substitution. Automotive grade versions may require specific AEC-Q100 qualified parts like the ULQ2003 in SO16 packages.