ULN2003LVDR

Overview

The ULN2003LVDR is a seven-channel relay and inductive load sink driver manufactured by Texas Instruments. It integrates seven NPN Darlington pairs with common emitters, each rated for 500 mA continuous collector current and capable of withstanding peak currents up to 600 mA. The device features integrated suppression diodes across the outputs to handle inductive load flyback voltages. Designed for low-voltage operation, it interfaces directly with TTL, CMOS, PMOS, and DTL logic families. The component is supplied in a 16-pin TSSOP package with tape-and-reel packaging, suitable for surface-mount assembly.

Feature Summary

• Integrates seven independent high-current NPN Darlington transistor channels within a single package
• Includes built-in clamping diodes on all output channels to suppress voltage spikes from inductive loads
• Features input pins positioned opposite corresponding output pins to facilitate printed circuit board layout

Applications

• Driving stepper motors and DC brushed motors
• Actuating electromagnetic relays and solenoids
• Powering filament lamps and thermal printheads
• Serving as high-power buffers for logic signals

Procurement Notes

Verify that the specific orderable part number matches the required suffix configuration. Confirm the package type corresponds to the intended manufacturing process. Ensure the operating temperature range aligns with the system environment requirements before finalizing procurement.

Selection Notes

Select this component when driving multiple inductive loads from low-voltage digital logic sources. The internal diodes eliminate the need for external flyback protection components. Verify that the load current does not exceed the per-channel rating or total power dissipation limits under worst-case thermal conditions.

Part Context

This device belongs to the ULN2003A family of high-voltage, high-current Darlington arrays. While the standard ULN2003AN utilizes a PDIP package, the LVDR variant specifically denotes the low-voltage version housed in a TSSOP-16 surface-mount package. It shares functional compatibility with other members of the series but differs in physical form factor and specific voltage optimization.

Replacement Considerations

Direct pin-compatible alternatives include the ULN2003D1R in SOIC-16 packaging or the ULN2003V12 series for similar surface-mount applications. Cross-reference datasheets to confirm identical pinout assignments and electrical characteristics before substituting.