MAX9120ESA+T

Overview

The MAX9120ESA+T is a nanopower comparator in an 8-pin SO package, operating from +1.6V to +5.5V with 350nA supply current. It features Beyond-the-Rails inputs extending 200mV beyond the supply rails and an open-drain output capable of pulling up to 6V above VEE. The device includes internal hysteresis for clean switching and guarantees operation over the -40°C to +85°C temperature range.

Feature Summary

• Ultra-low power consumption with 350nA supply current
• Beyond-the-Rails input voltage range extending 200mV past supply rails
• Open-drain output stage suitable for mixed-voltage logic translation
• Internal hysteresis prevents oscillation during slow signal transitions

Applications

• 2-cell battery monitoring and management systems
• Logic-level translation between different voltage domains
• Threshold detectors and discriminators
• Zero-crossing detection circuits

Procurement Notes

Verify the suffix 'ESA+T' corresponds to the 8-pin SO package with lead-free construction. Confirm the device is the non-reference variant (MAX9120) rather than the reference-equipped MAX9117/MAX9118. Ensure the ordering code matches the specific manufacturer's designation for this component family.

Selection Notes

Select the MAX9120 when an open-drain output is required for wire-OR configurations or mixed-voltage interfacing. Choose this part over the push-pull variants if the system design necessitates an external pullup resistor to a voltage higher than the supply rail. Verify that the 350nA quiescent current meets the ultra-low-power requirements of the application.

Part Context

This component belongs to the MAX9117–MAX9120 family of nanopower comparators designed for space-saving SC70 and SO packages. The family shares identical electrical characteristics regarding input range and power consumption, differing primarily in output stage configuration and the presence of an internal reference voltage.

Replacement Considerations

The MAX9119 is a pin-compatible alternative with a push-pull output stage instead of open-drain. The MAX9117 and MAX9118 are also pin-compatible but include an internal 1.252V reference and draw higher supply current.