ULN2004ANSR

Overview

The ULN2004ANSR is a high-voltage, high-current Darlington transistor array manufactured by Texas Instruments. It integrates seven NPN Darlington pairs within a single SOIC-16 surface-mount package. Each channel provides a collector current capability of up to 500 mA and supports a collector-emitter voltage rating of 50 V. The device includes built-in clamping flyback diodes across each output to suppress inductive kickback from external loads. Designed for robust operation, it functions reliably across an extended temperature range from -20 °C to +70 °C.

Feature Summary

• Integrates seven independent NPN Darlington transistor channels for multi-load control
• Includes internal clamping diodes on all outputs to protect against inductive load transients
• Supports direct interfacing with TTL, CMOS, or MOS logic families without additional drivers

Applications

• Relay driver circuits for industrial automation systems
• Stepper motor phase control in embedded devices
• High-current LED matrix addressing and display driving

Procurement Notes

Verify the specific suffix 'SR' indicates tape-and-reel packaging when sourcing components. Confirm the manufacturer designation as Texas Instruments to ensure compatibility with original design specifications. Validate that the component meets the required environmental operating standards for the intended application environment before finalizing procurement orders.

Selection Notes

Select this component when multiple high-current switching channels are required in a compact surface-mount footprint. Ensure the load current does not exceed the per-channel limit and consider thermal dissipation requirements for the SOIC-16 package. Verify that the input logic voltage levels are compatible with the integrated base resistors for proper saturation.

Part Context

This part belongs to the ULN2004 series of high-voltage Darlington arrays. It serves as a surface-mount alternative to through-hole variants like the ULN2004AN. The device is designed to simplify the interface between low-power digital logic controllers and high-power electromechanical loads such as relays and solenoids.

Replacement Considerations

The ULN2004AD is a pin-compatible SOIC-16 variant from the same manufacturer. Cross-reference with other ULN2004 series parts to verify package dimensions and electrical characteristics match the existing board layout constraints.