ULN2003ANSR

Overview

The ULN2003ANSR is a high-voltage, high-current Darlington transistor array manufactured by Texas Instruments. It integrates seven NPN Darlington pairs with common emitters and integrated clamp diodes for inductive load suppression. The device features a surface-mount TSSOP-16 package and operates within a temperature range of -40°C to +85°C. Key electrical parameters include a maximum continuous collector current of 500 mA per channel, a collector-emitter voltage rating of 50 V, and a collector-emitter saturation voltage of 1.1 V. The input stage includes internal base resistors, ensuring TTL/CMOS compatibility without external components.

Feature Summary

• Integrates seven independent high-voltage Darlington pairs with common cathode clamp diodes for efficient inductive load switching.
• Features internal base resistors that simplify interface connections to standard logic families such as TTL, CMOS, and PMOS.
• Designed for robust operation with high current gain and wide operating temperature range suitable for demanding industrial environments.

Applications

• Relay drivers
• Stepper motor controllers
• LED and gas discharge lamp drivers
• Line drivers and logic buffers

Procurement Notes

Verify the specific suffix ANSR confirms the TSSOP-16 surface mount package and tape-and-reel shipping format. Confirm the manufacturer is Texas Instruments to ensure compliance with specified electrical characteristics. Check for RoHS compliance status if required by assembly standards. Validate the date code against production lifecycle status to ensure availability.

Selection Notes

Select this component when driving multiple inductive loads from a single microcontroller or logic source. The integrated clamp diodes eliminate the need for external flyback protection circuits. Ensure the load current does not exceed 500 mA per channel and consider thermal dissipation requirements for the TSSOP-16 package under continuous operation.

Part Context

This part belongs to the ULN200xA series of high-voltage, high-current Darlington arrays. It is functionally similar to the through-hole ULN2003AN but utilizes a surface-mount TSSOP-16 package. The series is widely used in automation and control systems requiring isolated switching of high-power devices from low-power logic signals.

Replacement Considerations

Direct pin-compatible alternatives include the ULN2003A from other manufacturers such as ON Semiconductor or STMicroelectronics. Verify that substitute parts maintain the same 500 mA current rating and 50 V voltage tolerance. Ensure the replacement package matches the TSSOP-16 footprint and thermal characteristics.