LM2903VQDR

Overview

The LM2903VQDR is a dual differential voltage comparator manufactured by Texas Instruments. It operates on a single supply voltage ranging from 2 V to 36 V, or dual supplies of ±1 V to ±18 V. The device features an open-collector output capable of sinking up to 20 mA and supports CMOS and TTL logic levels. Key electrical parameters include a maximum input offset voltage of 7 mV at 32 V, a typical response time of 1.3 µs, and a maximum quiescent current of 2.5 mA. It is housed in an 8-SOIC package with a width of 3.90 mm and functions within a temperature range of -40°C to +125°C.

Feature Summary

• Dual-channel differential voltage comparison with rail-to-rail input capability including ground reference.
• Open-collector outputs compatible with various logic families for flexible interfacing.
• Designed for operation across a wide single-supply voltage range without requiring dual supplies.

Applications

• Overvoltage and undervoltage detection circuits
• Window comparator configurations
• Level shifting between different logic families

Procurement Notes

Verify the specific suffix 'VQDR' against the manufacturer's official datasheet to confirm the exact package variant and automotive qualification status. Ensure the ordering part number matches the required tape-and-reel quantity specifications. Cross-reference the RoHS compliance status and moisture sensitivity level with the latest production data sheet before finalizing procurement orders.

Selection Notes

Select this component when a dual comparator with wide common-mode input range extending to ground is required. The open-collector output allows for wired-AND connections and easy interface with higher voltage logic systems. Consider the 1.3 µs propagation delay for applications where moderate switching speed is sufficient, and verify that the 20 mA sink current meets the load requirements.

Part Context

This device belongs to the LMx93/LM2903 family of dual differential voltage comparers. It shares functional similarities with the LM2903 but includes specific packaging and qualification designators. The series is widely used in industrial and consumer electronics for basic voltage monitoring tasks due to its low cost and broad operating voltage range.

Replacement Considerations

LM2903QDRQ1 is a confirmed automotive-grade substitute within the same family. LM2903VQDrg4q1 is listed as a backup manufacturing part number. Verify pinout compatibility and electrical parameter tolerances before substituting with generic LM2903 variants.