E-ULN2001A

Overview

The ULN2001A is a high-voltage, high-current Darlington array manufactured by STMicroelectronics. It contains seven open collector Darlington pairs with common emitters. Each channel supports a continuous collector current of 500 mA and withstands peak currents up to 600 mA. The output voltage rating is 50 V. Integrated suppression diodes are included for inductive load driving. Inputs are pinned opposite outputs to simplify board layout. The device interfaces with general purpose logic, DTL, TTL, PMOS, and CMOS families. It is supplied in a 16-pin DIP package with a copper leadframe.

Feature Summary

• Seven Darlington pairs per package
• Integrated suppression diodes for inductive loads
• TTL/CMOS/PMOS/DTL compatible inputs
• Input pins placed opposite to output pins

Applications

• Solenoids
• Relay DC motors
• LED display filament lamps
• Thermal printheads
• High-power buffers

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package type and tape/reel specifications. Ensure the component matches the required logic family compatibility and thermal resistance characteristics for the intended application environment.

Selection Notes

Select this component when driving inductive loads requiring high voltage and current switching capabilities. Verify that the input logic levels align with the general purpose, DTL, TTL, PMOS, or CMOS requirements. Consider the 16-pin DIP package constraints for board layout and thermal management.

Part Context

The ULN2001A belongs to the ULN200x series of high-voltage Darlington arrays. This series includes variants like ULN2002, ULN2003, and ULN2004, which differ primarily in input threshold voltages for specific logic families. The ULN2001A serves as the general-purpose option within this lineup.

Replacement Considerations

Check for ULN2001D1 for SO-16 package equivalents. Verify pinout compatibility with ULN2003 if TTL logic is used exclusively.