ULN2003ADYYR

Overview

The ULN2003ADYYR is a high-voltage, high-current Darlington transistor array manufactured by Texas Instruments. It integrates seven NPN Darlington pairs within a single SOT-16 package (DYY). Each channel provides a collector current rating of 500 mA and supports output voltages up to 50 V. The device includes integrated common-cathode clamp diodes for switching inductive loads. Input channels utilize a 2.7 kΩ series base resistor, enabling direct interface with TTL or 5 V CMOS logic families. The component operates across an extended temperature range from -40°C to 105°C.

Feature Summary

• Integrates seven independent NPN Darlington transistor pairs for multi-channel load control
• Features built-in suppression diodes connected to the common cathode node for inductive kickback protection
• Includes internal base resistors allowing direct connection to standard logic families without external components

Applications

• Relay Drivers
• Stepper and DC Brushed Motor Drivers
• Lamp Drivers
• Display Drivers (LED and Gas Discharge)
• Logic Buffers

Procurement Notes

Verify the specific DYY package variant against the official datasheet orderable addendum to ensure correct pinout and thermal characteristics. Confirm that the suffix 'R' corresponds to the required tape-and-reel packaging format for automated assembly processes. Cross-reference the manufacturer's latest documentation to validate availability status and any recent design changes.

Selection Notes

Select this component when driving multiple low-power logic signals into high-voltage or high-current loads simultaneously. The 2.7 kΩ input resistors make it suitable for 5 V logic systems. For applications requiring higher voltage tolerance, consider the SN75468 or SN75469 devices. Ensure the total power dissipation remains within limits defined by the junction-to-ambient thermal resistance for the SOT-16 package.

Part Context

This part belongs to the ULx200xA family of high-voltage Darlington arrays produced by Texas Instruments. The family includes variants like ULN2002A, ULN2003A, and ULN2004A, distinguished primarily by their input resistor values and logic compatibility. The ULN2003A specifically targets 5 V TTL and CMOS interfaces, offering a versatile solution for general-purpose digital-to-analog load interfacing tasks.

Replacement Considerations

ULN2003ADYR