ULQ2004ADRG4

Overview

The ULQ2004ADRG4 is a high-voltage, high-current Darlington transistor array manufactured by Texas Instruments. It integrates seven independent NPN Darlington pairs within a single SOIC-16 surface-mount package. Each channel provides a maximum continuous collector current of 300 mA and supports a collector-emitter voltage of up to 50 V. The device features built-in clamp diodes across each output and common emitter connection, facilitating the direct driving of inductive loads such as relays and solenoids without external protection components. It operates within an ambient temperature range of -20°C to +70°C.

Feature Summary

• Integrates seven independent high-current switching channels for compact circuit design
• Includes internal flyback diodes to protect against inductive load voltage spikes
• Designed for direct interface with standard logic families including TTL and CMOS

Applications

• Driving electromagnetic relays and contactors
• Controlling DC solenoids and small motors
• General-purpose high-side switching in industrial control systems

Procurement Notes

Verify the specific suffix 'RG4' confirms the tape-and-reel packaging format required for automated assembly processes. Confirm RoHS compliance status and lead times directly with authorized distributors or Texas Instruments, as availability may vary based on production cycles and regional stock levels.

Selection Notes

Select this component when multiple high-current switching channels are required in a limited board area. Ensure the load current per channel does not exceed 300 mA and that the total power dissipation remains within thermal limits for the SOIC-16 package. Verify input voltage compatibility with the controlling logic family.

Part Context

This part belongs to the ULQ2004 series of Darlington arrays, which are variants of the widely used ULN2003 family. While the ULN2003 typically contains five channels, the ULQ2004 variant provides seven channels, offering higher integration density for applications requiring more simultaneous switching outputs.

Replacement Considerations

The ULN2003ADR is a functional substitute but contains only five channels instead of seven. Other compatible alternatives include the ULN2004A and ULN2004AN, though these may differ in packaging type (tube vs. reel) or pinout configuration.