LM339LVDR

Overview

The LM339LVDR is a low-voltage quad analog comparator manufactured by Texas Instruments. It operates within a supply voltage range of 1.65 V to 5.5 V and features rail-to-rail input capability. The device provides four independent channels with open-drain outputs, suitable for interfacing with various logic families. It exhibits a typical propagation delay of 0.6 µs and an input offset voltage of 400 µV. Designed for surface-mount applications, it is housed in a SOIC-14 package and supports operation across an extended temperature range from -40°C to +125°C.

Feature Summary

• Low-voltage operation supporting single-supply systems down to 1.65 V
• Rail-to-rail input stage allows signal levels near ground or positive rail
• Open-drain output configuration enables flexible logic level translation
• Extended industrial temperature rating ensures reliability in harsh environments

Applications

• Battery-powered portable devices requiring low supply voltage
• Temperature sensing circuits utilizing thermistor bridges
• General-purpose voltage monitoring and threshold detection
• Level shifting interfaces between different logic voltage domains

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current datasheet to confirm package type and tape-and-reel specifications. Ensure compatibility with the target PCB footprint for the SOIC-14 narrow package. Confirm that the required operating temperature range aligns with the specified -40°C to +125°C limits for your application environment.

Selection Notes

Select this component when system power constraints require operation below standard 5 V rails while maintaining multiple comparator channels. The low input offset voltage improves accuracy in precision sensing applications compared to standard LM339 variants. Consider the open-drain output requirement for pull-up resistor selection in the final circuit design.

Part Context

This part belongs to the LM339LV family, which extends the functionality of the traditional LM339 series into lower voltage domains. While the standard LM339 operates up to 36 V, the LV variant is optimized for modern low-power electronics. It shares pinout compatibility with other quad comparators but differs significantly in electrical characteristics and supply voltage limitations.

Replacement Considerations

Direct substitutes include LM339M and LM339MX-NOPB, though these operate at higher voltages up to 36 V. Verify that the higher voltage ratings do not conflict with low-voltage logic interfaces in the target design.