ULN2003D1013TR

Overview

The ULN2003D1013TR is a seven-channel NPN Darlington transistor array manufactured by STMicroelectronics in a surface-mount SOIC-16 package. It features a maximum continuous collector current of 500 mA and a collector-emitter voltage rating of 50 V per channel. The device includes internal suppression diodes for driving inductive loads, with inputs and outputs arranged oppositely to simplify PCB layout. Key electrical parameters include a minimum DC current gain (hFE) of 1000 at 350 mA and a maximum collector-emitter saturation voltage of 1.6 V at 500 µA base current and 350 mA collector current. The operating temperature range extends from -40°C to +85°C.

Feature Summary

• Integrates seven independent NPN Darlington pairs within a single compact package.
• Includes built-in clamping diodes across each output to handle back EMF from inductive loads.
• Features inverted pinout configuration where input pins are opposite corresponding output pins.

Applications

• Relay driver circuits
• High-current switching applications
• Logic-to-power interface modules

Procurement Notes

Verify the specific suffix D1013TR against the manufacturer's official datasheet to confirm package dimensions and tape-and-reel specifications. Ensure compatibility with standard SOIC-16 footprint designs. Check for RoHS compliance status as indicated in the latest product documentation before finalizing procurement orders.

Selection Notes

Select this component when multiple high-current switches are required in a space-constrained design. The integrated diodes eliminate external components for inductive load protection. Compare hFE requirements against the minimum specification of 1000 to ensure adequate drive capability from logic-level inputs without excessive base current.

Part Context

This part belongs to the ULN200x series of seven-channel Darlington arrays. Variants such as ULN2001, ULN2002, and ULN2004 differ primarily in the presence or absence of specific input pull-down resistors or output configurations. The ULN2003 variant specifically omits these resistors, requiring external pull-ups if open-collector outputs need defined high states.

Replacement Considerations

Direct substitutes include ULN2003ADR from Texas Instruments and UTCULN2003 from Unisonic Technologies. Verify pinout compatibility and thermal characteristics before substitution. Other family members like ULN2004 may require circuit modifications due to differing internal resistor networks.