LM2903PSR

Overview

The LM2903PSR is a dual differential voltage comparator manufactured by Texas Instruments, housed in an 8-pin TSSOP surface-mount package. It operates on a single supply voltage ranging from 2V to 30V or dual supplies up to ±15V. The device features open-collector outputs compatible with CMOS and TTL logic families. Key electrical specifications include a typical response time of 1.3µs, a maximum input offset voltage of 7mV, and a quiescent current of 200µA. Each output channel can source up to 6mA. The component supports an extended industrial temperature range from -40°C to +125°C.

Feature Summary

• Dual differential inputs for precise signal comparison
• Open-collector outputs enabling wired-AND configurations
• Wide single-supply operating voltage range
• CMOS and TTL logic output compatibility

Applications

• Over-voltage and under-voltage detection circuits
• Window comparator designs
• Level shifting interfaces between different logic families
• Temperature sensing threshold monitoring

Procurement Notes

Verify the specific suffix PSR indicates the Tape and Reel packaging format when ordering. Confirm that the TSSOP-8 footprint matches your PCB layout requirements. Ensure the selected variant meets the required thermal dissipation standards for your enclosure. Cross-reference the manufacturer datasheet for exact pinout definitions before finalizing assembly processes.

Selection Notes

Select this component when a dual-channel solution is required within a compact surface-mount form factor. The wide supply voltage range makes it suitable for battery-powered applications where voltage levels fluctuate. Consider the open-collector output structure if interfacing with higher voltage logic systems than the comparator's supply rail. Evaluate the 1.3µs propagation delay against your system's switching speed requirements.

Part Context

This part belongs to the LMx93/LM2903 series of dual comparators from Texas Instruments. It shares functional similarities with the LM2903DR (SOIC-8) and LM2903P (DIP-8), differing primarily in the physical package type. The series is designed for general-purpose voltage comparison tasks requiring low power consumption and broad supply voltage tolerance.

Replacement Considerations

LM2903DR serves as a direct functional equivalent in SOIC-8 packaging. LM2903P offers the same functionality in a through-hole DIP-8 package. Verify pin-to-pin compatibility and ensure the replacement package fits the designated board space.