ULQ2003ADR2G

Overview

The ULQ2003ADR2G is a high voltage, high current Darlington transistor array manufactured by onsemi. It integrates seven NPN Darlington connected transistors in a single SOIC-16 package (Case 751B). The device features an internal suppression diode for each output and a 5.0 kΩ series input resistor, making it compatible with 5.0 V TTL or CMOS logic systems. Key electrical ratings include a maximum collector-emitter voltage of 50 V, continuous collector current of 500 mA, and an operating ambient temperature range of -40°C to +85°C. The DC current gain is typically 1000 at 350 mA.

Feature Summary

• Integrates seven NPN Darlington pairs with built-in suppression diodes to handle inductive loads safely.
• Includes 5.0 kΩ series input resistors designed for direct interfacing with 5.0 V TTL or CMOS logic.
• Capable of driving incandescent lamps and other high-current loads with peak inrush currents up to 500 mA.

Applications

• Driving relays in industrial control systems
• Operating printer hammers in consumer electronics
• Switching incandescent lamps

Procurement Notes

Verify the ordering suffix 'R2G' corresponds to the SOIC-16 package with lead-free construction and tape-and-reel shipping quantity of 2500 units. Confirm the component meets Pb-Free specifications as indicated in the datasheet documentation. Ensure the specific part number matches the ULQ variant rather than the ULN variant due to differences in input resistance values.

Selection Notes

Select this component when a 5.0 V logic interface is required, as the ULQ2003A includes 5.0 kΩ input resistors unlike the ULN2003A which uses 2.7 kΩ resistors. Consider the -40°C to +85°C operating temperature range for environmental suitability. Verify that the 50 V breakdown voltage and 500 mA current capacity meet the load requirements before finalizing the design.

Part Context

The ULQ2003ADR2G belongs to the ULx2003A family of high-voltage Darlington arrays from onsemi. This family is engineered for robust load driving applications requiring isolation between low-voltage logic controls and higher-voltage loads. The ULQ variant specifically targets 5.0 V logic compatibility through its distinct input resistor configuration.

Replacement Considerations

The ULN2003ADR2G is a related part within the same family but utilizes a 2.7 kΩ input resistor instead of 5.0 kΩ. Substitution requires verification of logic level compatibility and input current draw differences. No other direct substitutes are documented in the provided source material.