MAX9019EKA+T

Overview

The MAX9019EKA+T is a dual nanoPower comparator in an 8-pin SOT-23 package. It operates down to 1.8V with a supply current of 0.85µA at 1.8V and 1.7µA at 5.0V. Input offset voltage is max 5mV at +25°C and 10mV over temperature. The input common-mode range extends 200mV beyond the rails. It features a CMOS push-pull output stage capable of ±6mA drive, internal 4mV hysteresis, and crowbar-current-free switching. Operating temperature range is -40°C to +85°C.

Feature Summary

• Ultra-low power consumption suitable for battery monitoring
• Beyond-the-Rails inputs extending 200mV past supply rails
• Push-pull output stage with high drive capability
• Internal hysteresis prevents oscillation on slow signals

Applications

• 2-cell battery monitoring and management
• Ultra-low power systems
• Mobile communications devices
• Threshold detectors and discriminators
• Window detectors

Procurement Notes

Verify the specific suffix 'EKA+T' matches the required SOT-23-8 package and tape-and-reel format. Confirm A-grade or B-grade reference availability if applicable, though this part lacks an internal reference. Ensure RoHS compliance status aligns with project requirements. Check for obsolescence notices as Maxim Integrated products may transition to Analog Devices inventory protocols.

Selection Notes

Select this component when ultra-low quiescent current is critical alongside rail-to-rail input capabilities. The push-pull output eliminates the need for external pull-up resistors compared to open-drain variants. Verify that the 4mV internal hysteresis meets noise immunity requirements without external feedback networks. Consider thermal dissipation limits in dense PCB layouts due to the small SOT-23 footprint.

Part Context

Part of the MAX9015–MAX9020 family of nanoPower comparators. Unlike the MAX9017 (which includes a reference), the MAX9019 provides dual comparators without an internal voltage reference. It shares the same space-saving SOT-23 packaging and low-voltage operation characteristics as its siblings, focusing on minimal power draw and precision input stages.

Replacement Considerations

Direct functional substitutes within the same family include the MAX9020EKA+T, which offers identical electrical characteristics but utilizes an open-drain output stage instead of push-pull. Designers must adjust circuitry to accommodate the external pull-up requirement for the open-drain variant.