MAX9117ESA+

Overview

The MAX9117ESA+ is a single-channel nanopower comparator housed in an 8-pin SO package. It operates on a supply voltage range of +1.6V to +5.5V with a typical supply current of 600nA. The device features a built-in 1.252V reference, Beyond-the-Rails inputs extending 200mV beyond the rails, and a push-pull output capable of ±5mA drive. It includes internal hysteresis for clean switching and guarantees operation from -40°C to +85°C.

Feature Summary

• Ultra-low power consumption with integrated 1.252V reference
• Beyond-the-Rails input voltage range extending 200mV past supply rails
• Push-pull output stage providing rail-to-rail swing with ±5mA drive capability
• Internal hysteresis ensures stable switching without external components

Applications

• Two-cell battery monitoring and management systems
• Ultra-low-power mobile communications devices
• Threshold detectors and discriminators
• Sensing applications at ground or supply lines
• Medical instruments and telemetry systems

Procurement Notes

Verify the specific suffix 'ESA+' corresponds to the 8-pin SO package variant rather than the SC70-5 version. Confirm RoHS compliance status as indicated by the '+' designation. Ensure the design accounts for the push-pull output configuration distinct from open-drain alternatives within the same family.

Selection Notes

Select this component when a fixed internal reference is required alongside ultra-low quiescent current. The push-pull output eliminates the need for external pull-up resistors compared to open-drain variants. Verify that the 600nA supply current meets strict battery life requirements for two-cell alkaline or lithium-ion configurations.

Part Context

This part belongs to the MAX9117–MAX9120 family of nanopower comparators designed for space-constrained applications. While other family members utilize the smaller SC70-5 package, the MAX9117ESA+ specifically utilizes the 8-pin SO footprint. It shares core electrical characteristics with the series but differs in physical dimensions and pinout availability.

Replacement Considerations

Direct substitutes include MAX9118ESA+ (open-drain output) and MAX9119ESA+ (no internal reference). Cross-family replacements require verification of supply voltage ranges and output drive capabilities.