LM339LVQDYYRQ1

Overview

The LM339LVQDYYRQ1 is an automotive-grade analog comparator from Texas Instruments, designed for low-voltage applications. It operates within a supply voltage range of 1.65 V to 5.5 V and features a single channel with rail-to-rail input capability. The device utilizes an open-drain output type and offers a propagation delay of 600 ns. Key electrical specifications include a maximum input offset voltage (Vos) of 400 µV, an input bias current (Ib) of 5 pA, and an input offset current (Ios) of 1 pA. It provides a common-mode rejection ratio (CMRR) of 65 dB and a power supply rejection ratio (PSRR) of 80 dB. The component functions reliably across an operating temperature range from -40°C to +125°C and is housed in a SOT-23-THIN-14 package.

Feature Summary

• Automotive qualification compliant with AEC-Q100 standards for reliability in vehicle environments.
• Low-voltage operation supporting systems powered by supplies as low as 1.65 V.
• Rail-to-rail input stage enables accurate signal comparison near ground and positive supply rails.

Applications

• Automotive sensor signal conditioning
• Battery management system monitoring
• Low-voltage industrial control circuits

Procurement Notes

Verify the specific suffix QDYYRQ1 against the manufacturer's official datasheet to confirm the exact package variant, tape-and-reel quantity, and automotive grade designation. Ensure the ordering part number matches the required pinout and thermal characteristics for the target PCB layout. Cross-reference the RoHS compliance status and material declarations with the latest product data sheet before finalizing procurement.

Selection Notes

Select this component when designing for automotive environments requiring high precision at low supply voltages. The ultra-low input bias current of 5 pA makes it suitable for high-impedance source applications where standard comparators might introduce significant error. Verify that the 600 ns propagation delay meets the timing requirements of the specific application, as faster alternatives exist within the family.

Part Context

This device belongs to the LM339LV series, which focuses on low-power and low-voltage performance compared to the standard LM339. The 'Q' prefix indicates automotive qualification, while 'Y' typically denotes the specific thin SOT-23 package style. This series is engineered to replace higher-voltage comparators in modern low-power automotive electronics, offering improved accuracy through reduced offset voltage.

Replacement Considerations

Direct replacements must match the SOT-23-THIN-14 package and automotive grade. Consider LM339LV variants with identical suffixes for pin-compatible swaps. Non-automotive equivalents like LM339LVDR lack the required Q100 certification and should not be used in certified automotive assemblies without explicit engineering approval.