LP239D

Overview

The LP239D is a low-power quad differential comparator manufactured by Texas Instruments. It features four independent voltage comparators designed for general-purpose applications. The device operates within a wide supply voltage range of 3 V to 30 V and draws a typical supply current of 500 µA. It utilizes an open-collector output configuration, allowing flexible interfacing with various logic families. The component is housed in a 14-SOIC package and supports operation across an industrial temperature range of -25°C to +85°C.

Feature Summary

• Quad differential comparator architecture providing four independent comparison channels
• Low-power design optimized for energy-efficient systems
• Wide single-supply voltage operational range
• Open-collector outputs compatible with multiple logic standards

Applications

• General-purpose voltage monitoring circuits
• Threshold detection systems
• Power supply supervision
• Over-voltage protection circuits

Procurement Notes

Verify the specific suffix 'D' corresponds to the 14-SOIC package and industrial temperature grade (-25°C to +85°C). Confirm RoHS compliance status as datasheets may vary by revision. Ensure the open-collector output requirement matches the target circuit design, as pull-up resistors are necessary for proper logic level translation.

Selection Notes

Select this component when a low-quiescent-current quad comparator is required for cost-sensitive designs. The open-collector output necessitates external pull-up resistors, which must be accounted for in the schematic. Compare against the LM239 series if rail-to-rail output swing or higher drive current is needed instead of the standard open-collector configuration found in the LP239.

Part Context

The LP239 belongs to the LPx39 family of low-power comparators from Texas Instruments. It serves as a lower-power alternative to the standard LM239 series, offering reduced quiescent current while maintaining similar functional pinouts. This family is widely used in battery-powered devices and portable electronics where power conservation is critical compared to higher-performance comparator alternatives.

Replacement Considerations

The LM239D is a direct functional substitute with identical pinout but higher power consumption. The LMV339 offers rail-to-rail output capabilities. Verify that the replacement part meets the specific temperature range and package requirements of the original design.